diff --git a/lib/src/test/resources/example-union-types-ning-client.txt b/lib/src/test/resources/example-union-types-ning-client.txt
index f6fa69815..5525b6853 100644
--- a/lib/src/test/resources/example-union-types-ning-client.txt
+++ b/lib/src/test/resources/example-union-types-ning-client.txt
@@ -373,9 +373,10 @@ package io.apibuilder.example.union.types.v0 {
 
     object Users extends Users {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.example.union.types.v0.models.User]] = {
-        _executeRequest("GET", s"/users", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.example.union.types.v0.Client.parseJson("Seq[io.apibuilder.example.union.types.v0.models.User]", r, _.validate[Seq[io.apibuilder.example.union.types.v0.models.User]])
           case r => throw io.apibuilder.example.union.types.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -383,9 +384,10 @@ package io.apibuilder.example.union.types.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.v0.models.User] = {
-        _executeRequest("GET", s"/users/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.example.union.types.v0.Client.parseJson("io.apibuilder.example.union.types.v0.models.User", r, _.validate[io.apibuilder.example.union.types.v0.models.User])
           case r if r.getStatusCode == 404 => throw io.apibuilder.example.union.types.v0.errors.UnitResponse(r.getStatusCode)
           case r => throw io.apibuilder.example.union.types.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200, 404", requestUri = Some(r.getUri))
@@ -394,11 +396,12 @@ package io.apibuilder.example.union.types.v0 {
 
       override def post(
         user: io.apibuilder.example.union.types.v0.models.User,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(user)
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.io.apibuilder.example.union.types.v0.Client.parseJson("io.apibuilder.example.union.types.v0.models.User", r, _.validate[io.apibuilder.example.union.types.v0.models.User])
           case r => throw io.apibuilder.example.union.types.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201", requestUri = Some(r.getUri))
         }
@@ -417,8 +420,8 @@ package io.apibuilder.example.union.types.v0 {
       }
     }
 
-    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): RequestBuilder = {
-      val builder = new RequestBuilder(method)
+    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): _root_.com.ning.http.client.RequestBuilder = {
+      val builder = new _root_.com.ning.http.client.RequestBuilder(method)
         .setUrl(baseUrl + path)
         .addHeader("User-Agent", Constants.UserAgent)
         .addHeader("X-Apidoc-Version", Constants.Version)
@@ -447,7 +450,8 @@ package io.apibuilder.example.union.types.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.ning.http.client.Response] = {
       val allHeaders = body match {
         case None => requestHeaders
@@ -465,7 +469,7 @@ package io.apibuilder.example.union.types.v0 {
         request.setBody(serialized)
       }
 
-      val finalRequest = requestWithParamsAndBody.build()
+      val finalRequest = requestModifier(requestWithParamsAndBody).build()
       _logRequest(finalRequest)
 
       val result = scala.concurrent.Promise[com.ning.http.client.Response]()
@@ -535,17 +539,20 @@ package io.apibuilder.example.union.types.v0 {
 
   trait Users {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.example.union.types.v0.models.User]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.v0.models.User]
 
     def post(
       user: io.apibuilder.example.union.types.v0.models.User,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.v0.models.User]
   }
 
diff --git a/lib/src/test/resources/example-union-types-play-23.txt b/lib/src/test/resources/example-union-types-play-23.txt
index ec6899c1f..48b8cfd99 100644
--- a/lib/src/test/resources/example-union-types-play-23.txt
+++ b/lib/src/test/resources/example-union-types-play-23.txt
@@ -488,9 +488,10 @@ package io.apibuilder.example.union.types.v0 {
 
     object Users extends Users {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.example.union.types.v0.models.User]] = {
-        _executeRequest("GET", s"/users", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.example.union.types.v0.Client.parseJson("Seq[io.apibuilder.example.union.types.v0.models.User]", r, _.validate[Seq[io.apibuilder.example.union.types.v0.models.User]])
           case r => throw io.apibuilder.example.union.types.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -498,9 +499,10 @@ package io.apibuilder.example.union.types.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.v0.models.User] = {
-        _executeRequest("GET", s"/users/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.example.union.types.v0.Client.parseJson("io.apibuilder.example.union.types.v0.models.User", r, _.validate[io.apibuilder.example.union.types.v0.models.User])
           case r if r.status == 404 => throw io.apibuilder.example.union.types.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.example.union.types.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -509,11 +511,12 @@ package io.apibuilder.example.union.types.v0 {
 
       override def post(
         user: io.apibuilder.example.union.types.v0.models.User,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(user)
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.example.union.types.v0.Client.parseJson("io.apibuilder.example.union.types.v0.models.User", r, _.validate[io.apibuilder.example.union.types.v0.models.User])
           case r => throw io.apibuilder.example.union.types.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201")
         }
@@ -553,32 +556,41 @@ package io.apibuilder.example.union.types.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -630,17 +642,20 @@ package io.apibuilder.example.union.types.v0 {
 
   trait Users {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.example.union.types.v0.models.User]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.v0.models.User]
 
     def post(
       user: io.apibuilder.example.union.types.v0.models.User,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.v0.models.User]
   }
 
diff --git a/lib/src/test/resources/generators/collection-json-defaults-ahc-client.txt b/lib/src/test/resources/generators/collection-json-defaults-ahc-client.txt
index d8db6f841..ee84dfd87 100644
--- a/lib/src/test/resources/generators/collection-json-defaults-ahc-client.txt
+++ b/lib/src/test/resources/generators/collection-json-defaults-ahc-client.txt
@@ -146,11 +146,12 @@ package com.gilt.test.v0 {
     object Users extends Users {
       override def post(
         user: com.gilt.test.v0.models.User,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(user)
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201", requestUri = Some(r.getUri.toJavaNetURI))
         }
@@ -159,9 +160,10 @@ package com.gilt.test.v0 {
       @deprecated("to be removed")
       override def getByEmail(
         @deprecated email: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
-        _executeRequest("GET", s"/users/${_root_.com.gilt.test.v0.PathSegment.encode(email, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${_root_.com.gilt.test.v0.PathSegment.encode(email, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri.toJavaNetURI))
         }
@@ -169,11 +171,12 @@ package com.gilt.test.v0 {
 
       override def patch(
         userPatch: com.gilt.test.v0.models.UserPatch,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(userPatch)
 
-        _executeRequest("PATCH", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PATCH", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri.toJavaNetURI))
         }
@@ -192,8 +195,8 @@ package com.gilt.test.v0 {
       }
     }
 
-    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): RequestBuilder = {
-      val builder = new RequestBuilder(method)
+    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): _root_.com.ning.http.client.RequestBuilder = {
+      val builder = new _root_.com.ning.http.client.RequestBuilder(method)
         .setUrl(baseUrl + path)
         .addHeader("User-Agent", Constants.UserAgent)
         .addHeader("X-Apidoc-Version", Constants.Version)
@@ -220,7 +223,8 @@ package com.gilt.test.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[org.asynchttpclient.Response] = {
       val allHeaders = body match {
         case None => requestHeaders
@@ -238,7 +242,7 @@ package com.gilt.test.v0 {
         request.setBody(serialized)
       }
 
-      val finalRequest = requestWithParamsAndBody.build()
+      val finalRequest = requestModifier(requestWithParamsAndBody).build()
       _logRequest(finalRequest)
 
       val result = scala.concurrent.Promise[org.asynchttpclient.Response]()
@@ -307,18 +311,21 @@ package com.gilt.test.v0 {
   trait Users {
     def post(
       user: com.gilt.test.v0.models.User,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
 
     @deprecated("to be removed")
     def getByEmail(
       @deprecated email: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
 
     def patch(
       userPatch: com.gilt.test.v0.models.UserPatch,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
   }
 
diff --git a/lib/src/test/resources/generators/collection-json-defaults-ning-client.txt b/lib/src/test/resources/generators/collection-json-defaults-ning-client.txt
index a374b8f8b..d4a6b2705 100644
--- a/lib/src/test/resources/generators/collection-json-defaults-ning-client.txt
+++ b/lib/src/test/resources/generators/collection-json-defaults-ning-client.txt
@@ -146,11 +146,12 @@ package com.gilt.test.v0 {
     object Users extends Users {
       override def post(
         user: com.gilt.test.v0.models.User,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(user)
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201", requestUri = Some(r.getUri))
         }
@@ -159,9 +160,10 @@ package com.gilt.test.v0 {
       @deprecated("to be removed")
       override def getByEmail(
         @deprecated email: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
-        _executeRequest("GET", s"/users/${_root_.com.gilt.test.v0.PathSegment.encode(email, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${_root_.com.gilt.test.v0.PathSegment.encode(email, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -169,11 +171,12 @@ package com.gilt.test.v0 {
 
       override def patch(
         userPatch: com.gilt.test.v0.models.UserPatch,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(userPatch)
 
-        _executeRequest("PATCH", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PATCH", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -192,8 +195,8 @@ package com.gilt.test.v0 {
       }
     }
 
-    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): RequestBuilder = {
-      val builder = new RequestBuilder(method)
+    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): _root_.com.ning.http.client.RequestBuilder = {
+      val builder = new _root_.com.ning.http.client.RequestBuilder(method)
         .setUrl(baseUrl + path)
         .addHeader("User-Agent", Constants.UserAgent)
         .addHeader("X-Apidoc-Version", Constants.Version)
@@ -222,7 +225,8 @@ package com.gilt.test.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.ning.http.client.Response] = {
       val allHeaders = body match {
         case None => requestHeaders
@@ -240,7 +244,7 @@ package com.gilt.test.v0 {
         request.setBody(serialized)
       }
 
-      val finalRequest = requestWithParamsAndBody.build()
+      val finalRequest = requestModifier(requestWithParamsAndBody).build()
       _logRequest(finalRequest)
 
       val result = scala.concurrent.Promise[com.ning.http.client.Response]()
@@ -311,18 +315,21 @@ package com.gilt.test.v0 {
   trait Users {
     def post(
       user: com.gilt.test.v0.models.User,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
 
     @deprecated("to be removed")
     def getByEmail(
       @deprecated email: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
 
     def patch(
       userPatch: com.gilt.test.v0.models.UserPatch,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
   }
 
diff --git a/lib/src/test/resources/generators/collection-json-defaults-play-23.txt b/lib/src/test/resources/generators/collection-json-defaults-play-23.txt
index 8eb574516..bf5a6a15e 100644
--- a/lib/src/test/resources/generators/collection-json-defaults-play-23.txt
+++ b/lib/src/test/resources/generators/collection-json-defaults-play-23.txt
@@ -238,11 +238,12 @@ package com.gilt.test.v0 {
     object Users extends Users {
       override def post(
         user: com.gilt.test.v0.models.User,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(user)
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201")
         }
@@ -251,9 +252,10 @@ package com.gilt.test.v0 {
       @deprecated("to be removed")
       override def getByEmail(
         @deprecated email: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
-        _executeRequest("GET", s"/users/${play.utils.UriEncoding.encodePathSegment(email, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${play.utils.UriEncoding.encodePathSegment(email, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -261,11 +263,12 @@ package com.gilt.test.v0 {
 
       override def patch(
         userPatch: com.gilt.test.v0.models.UserPatch,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(userPatch)
 
-        _executeRequest("PATCH", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PATCH", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.com.gilt.test.v0.Client.parseJson("com.gilt.test.v0.models.User", r, _.validate[com.gilt.test.v0.models.User])
           case r => throw com.gilt.test.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -305,32 +308,41 @@ package com.gilt.test.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -383,18 +395,21 @@ package com.gilt.test.v0 {
   trait Users {
     def post(
       user: com.gilt.test.v0.models.User,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
 
     @deprecated("to be removed")
     def getByEmail(
       @deprecated email: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
 
     def patch(
       userPatch: com.gilt.test.v0.models.UserPatch,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.gilt.test.v0.models.User]
   }
 
diff --git a/lib/src/test/resources/generators/play-22-built-in-types.txt b/lib/src/test/resources/generators/play-22-built-in-types.txt
index fe7f4f017..cfe65069e 100644
--- a/lib/src/test/resources/generators/play-22-built-in-types.txt
+++ b/lib/src/test/resources/generators/play-22-built-in-types.txt
@@ -454,9 +454,10 @@ package apibuilder {
 
     object Arrays extends Arrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array] = {
-        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Array", r, _.validate[apibuilder.models.Array])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200", requestUri = Some(r.ahcResponse.getUri))
         }
@@ -465,9 +466,10 @@ package apibuilder {
 
     object Optarrays extends Optarrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray] = {
-        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optarray", r, _.validate[apibuilder.models.Optarray])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200", requestUri = Some(r.ahcResponse.getUri))
         }
@@ -476,9 +478,10 @@ package apibuilder {
 
     object Optionals extends Optionals {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional] = {
-        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optional", r, _.validate[apibuilder.models.Optional])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200", requestUri = Some(r.ahcResponse.getUri))
         }
@@ -487,9 +490,10 @@ package apibuilder {
 
     object Requireds extends Requireds {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required] = {
-        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Required", r, _.validate[apibuilder.models.Required])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200", requestUri = Some(r.ahcResponse.getUri))
         }
@@ -529,32 +533,40 @@ package apibuilder {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
     ): scala.concurrent.Future[play.api.libs.ws.Response] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
           sys.error("PATCH method is not supported in Play Framework Version 2.2.x")
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -609,25 +621,29 @@ package apibuilder {
 
   trait Arrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array]
   }
 
   trait Optarrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray]
   }
 
   trait Optionals {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional]
   }
 
   trait Requireds {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WS.WSRequestHolder => play.api.libs.ws.WS.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required]
   }
 
diff --git a/lib/src/test/resources/generators/play-23-built-in-types.txt b/lib/src/test/resources/generators/play-23-built-in-types.txt
index 90d9d852a..1d0b1a961 100644
--- a/lib/src/test/resources/generators/play-23-built-in-types.txt
+++ b/lib/src/test/resources/generators/play-23-built-in-types.txt
@@ -454,9 +454,10 @@ package apibuilder {
 
     object Arrays extends Arrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array] = {
-        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Array", r, _.validate[apibuilder.models.Array])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -465,9 +466,10 @@ package apibuilder {
 
     object Optarrays extends Optarrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray] = {
-        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optarray", r, _.validate[apibuilder.models.Optarray])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -476,9 +478,10 @@ package apibuilder {
 
     object Optionals extends Optionals {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional] = {
-        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optional", r, _.validate[apibuilder.models.Optional])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -487,9 +490,10 @@ package apibuilder {
 
     object Requireds extends Requireds {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required] = {
-        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Required", r, _.validate[apibuilder.models.Required])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -529,32 +533,41 @@ package apibuilder {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -609,25 +622,29 @@ package apibuilder {
 
   trait Arrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array]
   }
 
   trait Optarrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray]
   }
 
   trait Optionals {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional]
   }
 
   trait Requireds {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required]
   }
 
diff --git a/lib/src/test/resources/generators/play-24-built-in-types.txt b/lib/src/test/resources/generators/play-24-built-in-types.txt
index fa12cd8f1..8ef8392e6 100644
--- a/lib/src/test/resources/generators/play-24-built-in-types.txt
+++ b/lib/src/test/resources/generators/play-24-built-in-types.txt
@@ -454,9 +454,10 @@ package apibuilder {
 
     object Arrays extends Arrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array] = {
-        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Array", r, _.validate[apibuilder.models.Array])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -465,9 +466,10 @@ package apibuilder {
 
     object Optarrays extends Optarrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray] = {
-        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optarray", r, _.validate[apibuilder.models.Optarray])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -476,9 +478,10 @@ package apibuilder {
 
     object Optionals extends Optionals {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional] = {
-        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optional", r, _.validate[apibuilder.models.Optional])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -487,9 +490,10 @@ package apibuilder {
 
     object Requireds extends Requireds {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required] = {
-        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Required", r, _.validate[apibuilder.models.Required])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -529,32 +533,41 @@ package apibuilder {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -609,25 +622,29 @@ package apibuilder {
 
   trait Arrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array]
   }
 
   trait Optarrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray]
   }
 
   trait Optionals {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional]
   }
 
   trait Requireds {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required]
   }
 
diff --git a/lib/src/test/resources/generators/play-25-built-in-types.txt b/lib/src/test/resources/generators/play-25-built-in-types.txt
index bb7fbe37e..68bc44953 100644
--- a/lib/src/test/resources/generators/play-25-built-in-types.txt
+++ b/lib/src/test/resources/generators/play-25-built-in-types.txt
@@ -455,9 +455,10 @@ package apibuilder {
 
     object Arrays extends Arrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array] = {
-        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Array", r, _.validate[apibuilder.models.Array])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -466,9 +467,10 @@ package apibuilder {
 
     object Optarrays extends Optarrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray] = {
-        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optarray", r, _.validate[apibuilder.models.Optarray])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -477,9 +479,10 @@ package apibuilder {
 
     object Optionals extends Optionals {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional] = {
-        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optional", r, _.validate[apibuilder.models.Optional])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -488,9 +491,10 @@ package apibuilder {
 
     object Requireds extends Requireds {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required] = {
-        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Required", r, _.validate[apibuilder.models.Required])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -529,32 +533,41 @@ package apibuilder {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -609,25 +622,29 @@ package apibuilder {
 
   trait Arrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array]
   }
 
   trait Optarrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray]
   }
 
   trait Optionals {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional]
   }
 
   trait Requireds {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required]
   }
 
diff --git a/lib/src/test/resources/generators/play-26-apidoc-api.txt b/lib/src/test/resources/generators/play-26-apidoc-api.txt
index 402f379e5..c837bc10f 100644
--- a/lib/src/test/resources/generators/play-26-apidoc-api.txt
+++ b/lib/src/test/resources/generators/play-26-apidoc-api.txt
@@ -2195,7 +2195,8 @@ package io.apibuilder.api.v0 {
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Application]] = {
         val queryParameters = Seq(
           name.map("name" -> _),
@@ -2206,7 +2207,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Application]", r, _.validate[Seq[io.apibuilder.api.v0.models.Application]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2215,11 +2216,12 @@ package io.apibuilder.api.v0 {
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application] = {
         val payload = play.api.libs.json.Json.toJson(applicationForm)
 
-        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Application", r, _.validate[io.apibuilder.api.v0.models.Application])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2230,11 +2232,12 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application] = {
         val payload = play.api.libs.json.Json.toJson(applicationForm)
 
-        _executeRequest("PUT", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Application", r, _.validate[io.apibuilder.api.v0.models.Application])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2244,9 +2247,10 @@ package io.apibuilder.api.v0 {
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2256,11 +2260,12 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application] = {
         val payload = play.api.libs.json.Json.toJson(moveForm)
 
-        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/move", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/move", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Application", r, _.validate[io.apibuilder.api.v0.models.Application])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2274,7 +2279,8 @@ package io.apibuilder.api.v0 {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2283,7 +2289,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/attributes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/attributes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Attribute]", r, _.validate[Seq[io.apibuilder.api.v0.models.Attribute]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2291,9 +2297,10 @@ package io.apibuilder.api.v0 {
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Attribute] = {
-        _executeRequest("GET", s"/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Attribute", r, _.validate[io.apibuilder.api.v0.models.Attribute])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2302,11 +2309,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Attribute] = {
         val payload = play.api.libs.json.Json.toJson(attributeForm)
 
-        _executeRequest("POST", s"/attributes", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/attributes", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Attribute", r, _.validate[io.apibuilder.api.v0.models.Attribute])
           case r if r.status == 401 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
@@ -2316,9 +2324,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 401 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
@@ -2333,7 +2342,8 @@ package io.apibuilder.api.v0 {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Change]] = {
         val queryParameters = Seq(
           orgKey.map("org_key" -> _),
@@ -2342,7 +2352,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/changes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/changes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Change]", r, _.validate[Seq[io.apibuilder.api.v0.models.Change]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2355,9 +2365,10 @@ package io.apibuilder.api.v0 {
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Code] = {
-        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(generatorKey, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(generatorKey, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Code", r, _.validate[io.apibuilder.api.v0.models.Code])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
@@ -2370,11 +2381,12 @@ package io.apibuilder.api.v0 {
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Domain] = {
         val payload = play.api.libs.json.Json.toJson(domain)
 
-        _executeRequest("POST", s"/domains/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/domains/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Domain", r, _.validate[io.apibuilder.api.v0.models.Domain])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2384,9 +2396,10 @@ package io.apibuilder.api.v0 {
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/domains/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/domains/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2396,11 +2409,12 @@ package io.apibuilder.api.v0 {
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val payload = play.api.libs.json.Json.toJson(emailVerificationConfirmationForm)
 
-        _executeRequest("POST", s"/email_verification_confirmations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/email_verification_confirmations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204, 409")
@@ -2415,7 +2429,8 @@ package io.apibuilder.api.v0 {
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2425,7 +2440,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/generator_services", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/generator_services", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.GeneratorService]", r, _.validate[Seq[io.apibuilder.api.v0.models.GeneratorService]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2433,9 +2448,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorService] = {
-        _executeRequest("GET", s"/generator_services/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/generator_services/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.GeneratorService", r, _.validate[io.apibuilder.api.v0.models.GeneratorService])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2444,11 +2460,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorService] = {
         val payload = play.api.libs.json.Json.toJson(generatorServiceForm)
 
-        _executeRequest("POST", s"/generator_services", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/generator_services", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.GeneratorService", r, _.validate[io.apibuilder.api.v0.models.GeneratorService])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2457,9 +2474,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/generator_services/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/generator_services/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 403 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
@@ -2477,7 +2495,8 @@ package io.apibuilder.api.v0 {
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2489,7 +2508,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/generators", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/generators", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r, _.validate[Seq[io.apibuilder.api.v0.models.GeneratorWithService]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2497,9 +2516,10 @@ package io.apibuilder.api.v0 {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorWithService] = {
-        _executeRequest("GET", s"/generators/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/generators/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.GeneratorWithService", r, _.validate[io.apibuilder.api.v0.models.GeneratorWithService])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2509,18 +2529,20 @@ package io.apibuilder.api.v0 {
 
     object Healthchecks extends Healthchecks {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.generator.v0.models.Healthcheck] = {
-        _executeRequest("GET", s"/_internal_/healthcheck", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/_internal_/healthcheck", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.generator.v0.models.Healthcheck", r, _.validate[io.apibuilder.generator.v0.models.Healthcheck])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, String]] = {
-        _executeRequest("GET", s"/_internal_/migrate", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/_internal_/migrate", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Map[String, String]", r, _.validate[Map[String, String]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2532,7 +2554,8 @@ package io.apibuilder.api.v0 {
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Item]] = {
         val queryParameters = Seq(
           q.map("q" -> _),
@@ -2540,7 +2563,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/items", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/items", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Item]", r, _.validate[Seq[io.apibuilder.api.v0.models.Item]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2548,9 +2571,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Item] = {
-        _executeRequest("GET", s"/items/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/items/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Item", r, _.validate[io.apibuilder.api.v0.models.Item])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2566,7 +2590,8 @@ package io.apibuilder.api.v0 {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val queryParameters = Seq(
           orgGuid.map("org_guid" -> _.toString),
@@ -2577,7 +2602,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/membership_requests", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/membership_requests", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r, _.validate[Seq[io.apibuilder.api.v0.models.MembershipRequest]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2587,7 +2612,8 @@ package io.apibuilder.api.v0 {
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.MembershipRequest] = {
         val payload = play.api.libs.json.Json.obj(
           "org_guid" -> play.api.libs.json.Json.toJson(orgGuid),
@@ -2595,7 +2621,7 @@ package io.apibuilder.api.v0 {
           "role" -> play.api.libs.json.Json.toJson(role)
         )
 
-        _executeRequest("POST", s"/membership_requests", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/membership_requests", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.MembershipRequest", r, _.validate[io.apibuilder.api.v0.models.MembershipRequest])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2604,9 +2630,10 @@ package io.apibuilder.api.v0 {
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("POST", s"/membership_requests/${guid}/accept", requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/membership_requests/${guid}/accept", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204, 409")
@@ -2615,9 +2642,10 @@ package io.apibuilder.api.v0 {
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("POST", s"/membership_requests/${guid}/decline", requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/membership_requests/${guid}/decline", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204, 409")
@@ -2633,7 +2661,8 @@ package io.apibuilder.api.v0 {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val queryParameters = Seq(
           orgGuid.map("org_guid" -> _.toString),
@@ -2644,7 +2673,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/memberships", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/memberships", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Membership]", r, _.validate[Seq[io.apibuilder.api.v0.models.Membership]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2652,9 +2681,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Membership] = {
-        _executeRequest("GET", s"/memberships/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/memberships/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Membership", r, _.validate[io.apibuilder.api.v0.models.Membership])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2663,9 +2693,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/memberships/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/memberships/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2681,7 +2712,8 @@ package io.apibuilder.api.v0 {
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2693,7 +2725,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Organization]", r, _.validate[Seq[io.apibuilder.api.v0.models.Organization]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2701,9 +2733,10 @@ package io.apibuilder.api.v0 {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization] = {
-        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Organization", r, _.validate[io.apibuilder.api.v0.models.Organization])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2712,11 +2745,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization] = {
         val payload = play.api.libs.json.Json.toJson(organizationForm)
 
-        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Organization", r, _.validate[io.apibuilder.api.v0.models.Organization])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2726,11 +2760,12 @@ package io.apibuilder.api.v0 {
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization] = {
         val payload = play.api.libs.json.Json.toJson(organizationForm)
 
-        _executeRequest("PUT", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Organization", r, _.validate[io.apibuilder.api.v0.models.Organization])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2739,9 +2774,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2752,7 +2788,8 @@ package io.apibuilder.api.v0 {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val queryParameters = Seq(
           name.map("name" -> _),
@@ -2760,7 +2797,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.AttributeValue]", r, _.validate[Seq[io.apibuilder.api.v0.models.AttributeValue]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2769,9 +2806,10 @@ package io.apibuilder.api.v0 {
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.AttributeValue] = {
-        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.AttributeValue", r, _.validate[io.apibuilder.api.v0.models.AttributeValue])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2782,11 +2820,12 @@ package io.apibuilder.api.v0 {
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.AttributeValue] = {
         val payload = play.api.libs.json.Json.toJson(attributeValueForm)
 
-        _executeRequest("PUT", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.AttributeValue", r, _.validate[io.apibuilder.api.v0.models.AttributeValue])
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.AttributeValue", r, _.validate[io.apibuilder.api.v0.models.AttributeValue])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
@@ -2798,9 +2837,10 @@ package io.apibuilder.api.v0 {
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 401 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
@@ -2812,11 +2852,12 @@ package io.apibuilder.api.v0 {
     object PasswordResetRequests extends PasswordResetRequests {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val payload = play.api.libs.json.Json.toJson(passwordResetRequest)
 
-        _executeRequest("POST", s"/password_reset_requests", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/password_reset_requests", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204, 409")
@@ -2827,11 +2868,12 @@ package io.apibuilder.api.v0 {
     object PasswordResets extends PasswordResets {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val payload = play.api.libs.json.Json.toJson(passwordReset)
 
-        _executeRequest("POST", s"/password_resets", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/password_resets", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.PasswordResetSuccess", r, _.validate[io.apibuilder.api.v0.models.PasswordResetSuccess])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2847,7 +2889,8 @@ package io.apibuilder.api.v0 {
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2858,7 +2901,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/subscriptions", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/subscriptions", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Subscription]", r, _.validate[Seq[io.apibuilder.api.v0.models.Subscription]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2866,9 +2909,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Subscription] = {
-        _executeRequest("GET", s"/subscriptions/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/subscriptions/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Subscription", r, _.validate[io.apibuilder.api.v0.models.Subscription])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2877,11 +2921,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Subscription] = {
         val payload = play.api.libs.json.Json.toJson(subscriptionForm)
 
-        _executeRequest("POST", s"/subscriptions", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/subscriptions", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Subscription", r, _.validate[io.apibuilder.api.v0.models.Subscription])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -2890,9 +2935,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/subscriptions/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/subscriptions/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2905,7 +2951,8 @@ package io.apibuilder.api.v0 {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Token]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2913,7 +2960,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/tokens/users/${userGuid}", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/tokens/users/${userGuid}", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Token]", r, _.validate[Seq[io.apibuilder.api.v0.models.Token]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2921,9 +2968,10 @@ package io.apibuilder.api.v0 {
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.CleartextToken] = {
-        _executeRequest("GET", s"/tokens/${guid}/cleartext", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/tokens/${guid}/cleartext", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.CleartextToken", r, _.validate[io.apibuilder.api.v0.models.CleartextToken])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2932,11 +2980,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Token] = {
         val payload = play.api.libs.json.Json.toJson(tokenForm)
 
-        _executeRequest("POST", s"/tokens", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/tokens", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Token", r, _.validate[io.apibuilder.api.v0.models.Token])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -2945,9 +2994,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/tokens/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/tokens/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2959,7 +3009,8 @@ package io.apibuilder.api.v0 {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.User]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2967,7 +3018,7 @@ package io.apibuilder.api.v0 {
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.api.v0.models.User]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2975,9 +3026,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User] = {
-        _executeRequest("GET", s"/users/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.User", r, _.validate[io.apibuilder.api.v0.models.User])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2987,14 +3039,15 @@ package io.apibuilder.api.v0 {
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.obj(
           "email" -> play.api.libs.json.Json.toJson(email),
           "password" -> play.api.libs.json.Json.toJson(password)
         )
 
-        _executeRequest("POST", s"/users/authenticate", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users/authenticate", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.User", r, _.validate[io.apibuilder.api.v0.models.User])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3003,11 +3056,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(userForm)
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.User", r, _.validate[io.apibuilder.api.v0.models.User])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3017,11 +3071,12 @@ package io.apibuilder.api.v0 {
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(userUpdateForm)
 
-        _executeRequest("PUT", s"/users/${guid}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/users/${guid}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.User", r, _.validate[io.apibuilder.api.v0.models.User])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3032,11 +3087,12 @@ package io.apibuilder.api.v0 {
     object Validations extends Validations {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Validation] = {
         val payload = play.api.libs.json.Json.toJson(value)
 
-        _executeRequest("POST", s"/validations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/validations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Validation", r, _.validate[io.apibuilder.api.v0.models.Validation])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -3049,14 +3105,15 @@ package io.apibuilder.api.v0 {
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Version]] = {
         val queryParameters = Seq(
           Some("limit" -> limit.toString),
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Version]", r, _.validate[Seq[io.apibuilder.api.v0.models.Version]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -3066,9 +3123,10 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version] = {
-        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Version", r, _.validate[io.apibuilder.api.v0.models.Version])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -3079,11 +3137,12 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version] = {
         val payload = play.api.libs.json.Json.toJson(versionForm)
 
-        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Version", r, _.validate[io.apibuilder.api.v0.models.Version])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3095,11 +3154,12 @@ package io.apibuilder.api.v0 {
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version] = {
         val payload = play.api.libs.json.Json.toJson(versionForm)
 
-        _executeRequest("PUT", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Version", r, _.validate[io.apibuilder.api.v0.models.Version])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3110,9 +3170,10 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -3127,7 +3188,8 @@ package io.apibuilder.api.v0 {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -3138,7 +3200,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/watches", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/watches", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Watch]", r, _.validate[Seq[io.apibuilder.api.v0.models.Watch]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -3146,9 +3208,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Watch] = {
-        _executeRequest("GET", s"/watches/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/watches/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Watch", r, _.validate[io.apibuilder.api.v0.models.Watch])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -3159,7 +3222,8 @@ package io.apibuilder.api.v0 {
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Boolean] = {
         val queryParameters = Seq(
           userGuid.map("user_guid" -> _.toString),
@@ -3167,7 +3231,7 @@ package io.apibuilder.api.v0 {
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest("GET", s"/watches/check", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/watches/check", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Boolean", r, _.validate[Boolean])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -3175,11 +3239,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Watch] = {
         val payload = play.api.libs.json.Json.toJson(watchForm)
 
-        _executeRequest("POST", s"/watches", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/watches", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Watch", r, _.validate[io.apibuilder.api.v0.models.Watch])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -3188,9 +3253,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/watches/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/watches/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -3229,32 +3295,41 @@ package io.apibuilder.api.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -3345,7 +3420,8 @@ package io.apibuilder.api.v0 {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -3354,7 +3430,8 @@ package io.apibuilder.api.v0 {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3364,7 +3441,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3373,7 +3451,8 @@ package io.apibuilder.api.v0 {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     /**
@@ -3383,7 +3462,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application]
   }
 
@@ -3401,7 +3481,8 @@ package io.apibuilder.api.v0 {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -3409,7 +3490,8 @@ package io.apibuilder.api.v0 {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3417,7 +3499,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3426,7 +3509,8 @@ package io.apibuilder.api.v0 {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3442,7 +3526,8 @@ package io.apibuilder.api.v0 {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -3460,7 +3545,8 @@ package io.apibuilder.api.v0 {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Code]
   }
 
@@ -3471,7 +3557,8 @@ package io.apibuilder.api.v0 {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -3480,7 +3567,8 @@ package io.apibuilder.api.v0 {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3490,7 +3578,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3507,17 +3596,20 @@ package io.apibuilder.api.v0 {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -3525,7 +3617,8 @@ package io.apibuilder.api.v0 {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3549,22 +3642,26 @@ package io.apibuilder.api.v0 {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, String]]
   }
 
@@ -3578,12 +3675,14 @@ package io.apibuilder.api.v0 {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Item]
   }
 
@@ -3601,7 +3700,8 @@ package io.apibuilder.api.v0 {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -3611,7 +3711,8 @@ package io.apibuilder.api.v0 {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -3620,7 +3721,8 @@ package io.apibuilder.api.v0 {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     /**
@@ -3629,7 +3731,8 @@ package io.apibuilder.api.v0 {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3647,17 +3750,20 @@ package io.apibuilder.api.v0 {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3683,7 +3789,8 @@ package io.apibuilder.api.v0 {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -3691,7 +3798,8 @@ package io.apibuilder.api.v0 {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3699,7 +3807,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3708,7 +3817,8 @@ package io.apibuilder.api.v0 {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3716,7 +3826,8 @@ package io.apibuilder.api.v0 {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     /**
@@ -3732,7 +3843,8 @@ package io.apibuilder.api.v0 {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -3741,7 +3853,8 @@ package io.apibuilder.api.v0 {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3751,7 +3864,8 @@ package io.apibuilder.api.v0 {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3761,7 +3875,8 @@ package io.apibuilder.api.v0 {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3772,7 +3887,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3784,7 +3900,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -3806,7 +3923,8 @@ package io.apibuilder.api.v0 {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -3814,7 +3932,8 @@ package io.apibuilder.api.v0 {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -3822,12 +3941,14 @@ package io.apibuilder.api.v0 {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3841,7 +3962,8 @@ package io.apibuilder.api.v0 {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -3849,7 +3971,8 @@ package io.apibuilder.api.v0 {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -3857,12 +3980,14 @@ package io.apibuilder.api.v0 {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3879,7 +4004,8 @@ package io.apibuilder.api.v0 {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -3887,7 +4013,8 @@ package io.apibuilder.api.v0 {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3898,7 +4025,8 @@ package io.apibuilder.api.v0 {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3906,7 +4034,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3915,14 +4044,16 @@ package io.apibuilder.api.v0 {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -3940,7 +4071,8 @@ package io.apibuilder.api.v0 {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -3953,7 +4085,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3963,7 +4096,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3974,7 +4108,8 @@ package io.apibuilder.api.v0 {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3984,7 +4119,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -4006,7 +4142,8 @@ package io.apibuilder.api.v0 {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -4014,7 +4151,8 @@ package io.apibuilder.api.v0 {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -4027,7 +4165,8 @@ package io.apibuilder.api.v0 {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Boolean]
 
     /**
@@ -4035,12 +4174,14 @@ package io.apibuilder.api.v0 {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
diff --git a/lib/src/test/resources/generators/play-26-built-in-types.txt b/lib/src/test/resources/generators/play-26-built-in-types.txt
index 7ef64819a..361de69f9 100644
--- a/lib/src/test/resources/generators/play-26-built-in-types.txt
+++ b/lib/src/test/resources/generators/play-26-built-in-types.txt
@@ -455,9 +455,10 @@ package apibuilder {
 
     object Arrays extends Arrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array] = {
-        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Array", r, _.validate[apibuilder.models.Array])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -466,9 +467,10 @@ package apibuilder {
 
     object Optarrays extends Optarrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray] = {
-        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optarray", r, _.validate[apibuilder.models.Optarray])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -477,9 +479,10 @@ package apibuilder {
 
     object Optionals extends Optionals {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional] = {
-        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optional", r, _.validate[apibuilder.models.Optional])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -488,9 +491,10 @@ package apibuilder {
 
     object Requireds extends Requireds {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required] = {
-        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Required", r, _.validate[apibuilder.models.Required])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -529,32 +533,41 @@ package apibuilder {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -609,25 +622,29 @@ package apibuilder {
 
   trait Arrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array]
   }
 
   trait Optarrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray]
   }
 
   trait Optionals {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional]
   }
 
   trait Requireds {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required]
   }
 
diff --git a/lib/src/test/resources/generators/play-26-envelope.txt b/lib/src/test/resources/generators/play-26-envelope.txt
index 2ad5140e4..a9935f135 100644
--- a/lib/src/test/resources/generators/play-26-envelope.txt
+++ b/lib/src/test/resources/generators/play-26-envelope.txt
@@ -308,7 +308,8 @@ package io.gregor.time.types.v0 {
         queryDate: _root_.org.joda.time.LocalDate,
         queryTime: _root_.org.joda.time.DateTime,
         dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.Response[io.gregor.time.types.v0.models.DateTimeModel]] = {
         val payload = play.api.libs.json.Json.toJson(dateTimeModel)
 
@@ -317,7 +318,7 @@ package io.gregor.time.types.v0 {
           Some("query_time" -> _root_.org.joda.time.format.ISODateTimeFormat.dateTime.print(queryTime))
         ).flatten
 
-        _executeRequest("POST", s"/date_time_models/${play.utils.UriEncoding.encodePathSegment(_root_.org.joda.time.format.ISODateTimeFormat.date.print(pathDate), "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(_root_.org.joda.time.format.ISODateTimeFormat.dateTime.print(pathTime), "UTF-8")}", body = Some(payload), queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/date_time_models/${play.utils.UriEncoding.encodePathSegment(_root_.org.joda.time.format.ISODateTimeFormat.date.print(pathDate), "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(_root_.org.joda.time.format.ISODateTimeFormat.dateTime.print(pathTime), "UTF-8")}", body = Some(payload), queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.gregor.time.types.v0.Client.buildResponse("io.gregor.time.types.v0.models.DateTimeModel", r, _.validate[io.gregor.time.types.v0.models.DateTimeModel])
           case r => throw io.gregor.time.types.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -356,32 +357,41 @@ package io.gregor.time.types.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -451,7 +461,8 @@ package io.gregor.time.types.v0 {
       queryDate: _root_.org.joda.time.LocalDate,
       queryTime: _root_.org.joda.time.DateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.Response[io.gregor.time.types.v0.models.DateTimeModel]]
   }
 
diff --git a/lib/src/test/resources/generators/play-27-apidoc-api.txt b/lib/src/test/resources/generators/play-27-apidoc-api.txt
index 402f379e5..c837bc10f 100644
--- a/lib/src/test/resources/generators/play-27-apidoc-api.txt
+++ b/lib/src/test/resources/generators/play-27-apidoc-api.txt
@@ -2195,7 +2195,8 @@ package io.apibuilder.api.v0 {
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Application]] = {
         val queryParameters = Seq(
           name.map("name" -> _),
@@ -2206,7 +2207,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Application]", r, _.validate[Seq[io.apibuilder.api.v0.models.Application]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2215,11 +2216,12 @@ package io.apibuilder.api.v0 {
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application] = {
         val payload = play.api.libs.json.Json.toJson(applicationForm)
 
-        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Application", r, _.validate[io.apibuilder.api.v0.models.Application])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2230,11 +2232,12 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application] = {
         val payload = play.api.libs.json.Json.toJson(applicationForm)
 
-        _executeRequest("PUT", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Application", r, _.validate[io.apibuilder.api.v0.models.Application])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2244,9 +2247,10 @@ package io.apibuilder.api.v0 {
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2256,11 +2260,12 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application] = {
         val payload = play.api.libs.json.Json.toJson(moveForm)
 
-        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/move", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/move", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Application", r, _.validate[io.apibuilder.api.v0.models.Application])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2274,7 +2279,8 @@ package io.apibuilder.api.v0 {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2283,7 +2289,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/attributes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/attributes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Attribute]", r, _.validate[Seq[io.apibuilder.api.v0.models.Attribute]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2291,9 +2297,10 @@ package io.apibuilder.api.v0 {
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Attribute] = {
-        _executeRequest("GET", s"/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Attribute", r, _.validate[io.apibuilder.api.v0.models.Attribute])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2302,11 +2309,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Attribute] = {
         val payload = play.api.libs.json.Json.toJson(attributeForm)
 
-        _executeRequest("POST", s"/attributes", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/attributes", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Attribute", r, _.validate[io.apibuilder.api.v0.models.Attribute])
           case r if r.status == 401 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
@@ -2316,9 +2324,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 401 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
@@ -2333,7 +2342,8 @@ package io.apibuilder.api.v0 {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Change]] = {
         val queryParameters = Seq(
           orgKey.map("org_key" -> _),
@@ -2342,7 +2352,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/changes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/changes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Change]", r, _.validate[Seq[io.apibuilder.api.v0.models.Change]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2355,9 +2365,10 @@ package io.apibuilder.api.v0 {
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Code] = {
-        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(generatorKey, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(generatorKey, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Code", r, _.validate[io.apibuilder.api.v0.models.Code])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
@@ -2370,11 +2381,12 @@ package io.apibuilder.api.v0 {
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Domain] = {
         val payload = play.api.libs.json.Json.toJson(domain)
 
-        _executeRequest("POST", s"/domains/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/domains/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Domain", r, _.validate[io.apibuilder.api.v0.models.Domain])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2384,9 +2396,10 @@ package io.apibuilder.api.v0 {
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/domains/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/domains/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2396,11 +2409,12 @@ package io.apibuilder.api.v0 {
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val payload = play.api.libs.json.Json.toJson(emailVerificationConfirmationForm)
 
-        _executeRequest("POST", s"/email_verification_confirmations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/email_verification_confirmations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204, 409")
@@ -2415,7 +2429,8 @@ package io.apibuilder.api.v0 {
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2425,7 +2440,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/generator_services", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/generator_services", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.GeneratorService]", r, _.validate[Seq[io.apibuilder.api.v0.models.GeneratorService]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2433,9 +2448,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorService] = {
-        _executeRequest("GET", s"/generator_services/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/generator_services/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.GeneratorService", r, _.validate[io.apibuilder.api.v0.models.GeneratorService])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2444,11 +2460,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorService] = {
         val payload = play.api.libs.json.Json.toJson(generatorServiceForm)
 
-        _executeRequest("POST", s"/generator_services", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/generator_services", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.GeneratorService", r, _.validate[io.apibuilder.api.v0.models.GeneratorService])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2457,9 +2474,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/generator_services/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/generator_services/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 403 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
@@ -2477,7 +2495,8 @@ package io.apibuilder.api.v0 {
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2489,7 +2508,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/generators", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/generators", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r, _.validate[Seq[io.apibuilder.api.v0.models.GeneratorWithService]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2497,9 +2516,10 @@ package io.apibuilder.api.v0 {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorWithService] = {
-        _executeRequest("GET", s"/generators/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/generators/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.GeneratorWithService", r, _.validate[io.apibuilder.api.v0.models.GeneratorWithService])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2509,18 +2529,20 @@ package io.apibuilder.api.v0 {
 
     object Healthchecks extends Healthchecks {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.generator.v0.models.Healthcheck] = {
-        _executeRequest("GET", s"/_internal_/healthcheck", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/_internal_/healthcheck", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.generator.v0.models.Healthcheck", r, _.validate[io.apibuilder.generator.v0.models.Healthcheck])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, String]] = {
-        _executeRequest("GET", s"/_internal_/migrate", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/_internal_/migrate", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Map[String, String]", r, _.validate[Map[String, String]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2532,7 +2554,8 @@ package io.apibuilder.api.v0 {
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Item]] = {
         val queryParameters = Seq(
           q.map("q" -> _),
@@ -2540,7 +2563,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/items", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/items", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Item]", r, _.validate[Seq[io.apibuilder.api.v0.models.Item]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2548,9 +2571,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Item] = {
-        _executeRequest("GET", s"/items/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/items/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Item", r, _.validate[io.apibuilder.api.v0.models.Item])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2566,7 +2590,8 @@ package io.apibuilder.api.v0 {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val queryParameters = Seq(
           orgGuid.map("org_guid" -> _.toString),
@@ -2577,7 +2602,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/membership_requests", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/membership_requests", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r, _.validate[Seq[io.apibuilder.api.v0.models.MembershipRequest]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2587,7 +2612,8 @@ package io.apibuilder.api.v0 {
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.MembershipRequest] = {
         val payload = play.api.libs.json.Json.obj(
           "org_guid" -> play.api.libs.json.Json.toJson(orgGuid),
@@ -2595,7 +2621,7 @@ package io.apibuilder.api.v0 {
           "role" -> play.api.libs.json.Json.toJson(role)
         )
 
-        _executeRequest("POST", s"/membership_requests", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/membership_requests", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.MembershipRequest", r, _.validate[io.apibuilder.api.v0.models.MembershipRequest])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2604,9 +2630,10 @@ package io.apibuilder.api.v0 {
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("POST", s"/membership_requests/${guid}/accept", requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/membership_requests/${guid}/accept", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204, 409")
@@ -2615,9 +2642,10 @@ package io.apibuilder.api.v0 {
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("POST", s"/membership_requests/${guid}/decline", requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/membership_requests/${guid}/decline", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204, 409")
@@ -2633,7 +2661,8 @@ package io.apibuilder.api.v0 {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val queryParameters = Seq(
           orgGuid.map("org_guid" -> _.toString),
@@ -2644,7 +2673,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/memberships", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/memberships", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Membership]", r, _.validate[Seq[io.apibuilder.api.v0.models.Membership]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2652,9 +2681,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Membership] = {
-        _executeRequest("GET", s"/memberships/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/memberships/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Membership", r, _.validate[io.apibuilder.api.v0.models.Membership])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2663,9 +2693,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/memberships/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/memberships/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2681,7 +2712,8 @@ package io.apibuilder.api.v0 {
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2693,7 +2725,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Organization]", r, _.validate[Seq[io.apibuilder.api.v0.models.Organization]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2701,9 +2733,10 @@ package io.apibuilder.api.v0 {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization] = {
-        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Organization", r, _.validate[io.apibuilder.api.v0.models.Organization])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2712,11 +2745,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization] = {
         val payload = play.api.libs.json.Json.toJson(organizationForm)
 
-        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Organization", r, _.validate[io.apibuilder.api.v0.models.Organization])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2726,11 +2760,12 @@ package io.apibuilder.api.v0 {
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization] = {
         val payload = play.api.libs.json.Json.toJson(organizationForm)
 
-        _executeRequest("PUT", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Organization", r, _.validate[io.apibuilder.api.v0.models.Organization])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2739,9 +2774,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2752,7 +2788,8 @@ package io.apibuilder.api.v0 {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val queryParameters = Seq(
           name.map("name" -> _),
@@ -2760,7 +2797,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.AttributeValue]", r, _.validate[Seq[io.apibuilder.api.v0.models.AttributeValue]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2769,9 +2806,10 @@ package io.apibuilder.api.v0 {
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.AttributeValue] = {
-        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.AttributeValue", r, _.validate[io.apibuilder.api.v0.models.AttributeValue])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2782,11 +2820,12 @@ package io.apibuilder.api.v0 {
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.AttributeValue] = {
         val payload = play.api.libs.json.Json.toJson(attributeValueForm)
 
-        _executeRequest("PUT", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.AttributeValue", r, _.validate[io.apibuilder.api.v0.models.AttributeValue])
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.AttributeValue", r, _.validate[io.apibuilder.api.v0.models.AttributeValue])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
@@ -2798,9 +2837,10 @@ package io.apibuilder.api.v0 {
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/organizations/${play.utils.UriEncoding.encodePathSegment(key, "UTF-8")}/attributes/${play.utils.UriEncoding.encodePathSegment(name, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 401 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
@@ -2812,11 +2852,12 @@ package io.apibuilder.api.v0 {
     object PasswordResetRequests extends PasswordResetRequests {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val payload = play.api.libs.json.Json.toJson(passwordResetRequest)
 
-        _executeRequest("POST", s"/password_reset_requests", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/password_reset_requests", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204, 409")
@@ -2827,11 +2868,12 @@ package io.apibuilder.api.v0 {
     object PasswordResets extends PasswordResets {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val payload = play.api.libs.json.Json.toJson(passwordReset)
 
-        _executeRequest("POST", s"/password_resets", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/password_resets", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.PasswordResetSuccess", r, _.validate[io.apibuilder.api.v0.models.PasswordResetSuccess])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -2847,7 +2889,8 @@ package io.apibuilder.api.v0 {
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2858,7 +2901,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/subscriptions", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/subscriptions", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Subscription]", r, _.validate[Seq[io.apibuilder.api.v0.models.Subscription]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2866,9 +2909,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Subscription] = {
-        _executeRequest("GET", s"/subscriptions/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/subscriptions/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Subscription", r, _.validate[io.apibuilder.api.v0.models.Subscription])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2877,11 +2921,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Subscription] = {
         val payload = play.api.libs.json.Json.toJson(subscriptionForm)
 
-        _executeRequest("POST", s"/subscriptions", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/subscriptions", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Subscription", r, _.validate[io.apibuilder.api.v0.models.Subscription])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -2890,9 +2935,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/subscriptions/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/subscriptions/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2905,7 +2951,8 @@ package io.apibuilder.api.v0 {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Token]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2913,7 +2960,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/tokens/users/${userGuid}", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/tokens/users/${userGuid}", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Token]", r, _.validate[Seq[io.apibuilder.api.v0.models.Token]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2921,9 +2968,10 @@ package io.apibuilder.api.v0 {
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.CleartextToken] = {
-        _executeRequest("GET", s"/tokens/${guid}/cleartext", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/tokens/${guid}/cleartext", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.CleartextToken", r, _.validate[io.apibuilder.api.v0.models.CleartextToken])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2932,11 +2980,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Token] = {
         val payload = play.api.libs.json.Json.toJson(tokenForm)
 
-        _executeRequest("POST", s"/tokens", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/tokens", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Token", r, _.validate[io.apibuilder.api.v0.models.Token])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -2945,9 +2994,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/tokens/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/tokens/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -2959,7 +3009,8 @@ package io.apibuilder.api.v0 {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.User]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -2967,7 +3018,7 @@ package io.apibuilder.api.v0 {
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.api.v0.models.User]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -2975,9 +3026,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User] = {
-        _executeRequest("GET", s"/users/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.User", r, _.validate[io.apibuilder.api.v0.models.User])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -2987,14 +3039,15 @@ package io.apibuilder.api.v0 {
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.obj(
           "email" -> play.api.libs.json.Json.toJson(email),
           "password" -> play.api.libs.json.Json.toJson(password)
         )
 
-        _executeRequest("POST", s"/users/authenticate", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users/authenticate", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.User", r, _.validate[io.apibuilder.api.v0.models.User])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3003,11 +3056,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(userForm)
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.User", r, _.validate[io.apibuilder.api.v0.models.User])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3017,11 +3071,12 @@ package io.apibuilder.api.v0 {
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(userUpdateForm)
 
-        _executeRequest("PUT", s"/users/${guid}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/users/${guid}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.User", r, _.validate[io.apibuilder.api.v0.models.User])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3032,11 +3087,12 @@ package io.apibuilder.api.v0 {
     object Validations extends Validations {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Validation] = {
         val payload = play.api.libs.json.Json.toJson(value)
 
-        _executeRequest("POST", s"/validations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/validations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Validation", r, _.validate[io.apibuilder.api.v0.models.Validation])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -3049,14 +3105,15 @@ package io.apibuilder.api.v0 {
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Version]] = {
         val queryParameters = Seq(
           Some("limit" -> limit.toString),
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Version]", r, _.validate[Seq[io.apibuilder.api.v0.models.Version]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -3066,9 +3123,10 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version] = {
-        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Version", r, _.validate[io.apibuilder.api.v0.models.Version])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -3079,11 +3137,12 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version] = {
         val payload = play.api.libs.json.Json.toJson(versionForm)
 
-        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Version", r, _.validate[io.apibuilder.api.v0.models.Version])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3095,11 +3154,12 @@ package io.apibuilder.api.v0 {
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version] = {
         val payload = play.api.libs.json.Json.toJson(versionForm)
 
-        _executeRequest("PUT", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("PUT", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Version", r, _.validate[io.apibuilder.api.v0.models.Version])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 409")
@@ -3110,9 +3170,10 @@ package io.apibuilder.api.v0 {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/${play.utils.UriEncoding.encodePathSegment(orgKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(applicationKey, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(version, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -3127,7 +3188,8 @@ package io.apibuilder.api.v0 {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -3138,7 +3200,7 @@ package io.apibuilder.api.v0 {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest("GET", s"/watches", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/watches", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Seq[io.apibuilder.api.v0.models.Watch]", r, _.validate[Seq[io.apibuilder.api.v0.models.Watch]])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -3146,9 +3208,10 @@ package io.apibuilder.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Watch] = {
-        _executeRequest("GET", s"/watches/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/watches/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Watch", r, _.validate[io.apibuilder.api.v0.models.Watch])
           case r if r.status == 404 => throw io.apibuilder.api.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -3159,7 +3222,8 @@ package io.apibuilder.api.v0 {
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Boolean] = {
         val queryParameters = Seq(
           userGuid.map("user_guid" -> _.toString),
@@ -3167,7 +3231,7 @@ package io.apibuilder.api.v0 {
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest("GET", s"/watches/check", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/watches/check", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.api.v0.Client.parseJson("Boolean", r, _.validate[Boolean])
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -3175,11 +3239,12 @@ package io.apibuilder.api.v0 {
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Watch] = {
         val payload = play.api.libs.json.Json.toJson(watchForm)
 
-        _executeRequest("POST", s"/watches", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/watches", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.api.v0.Client.parseJson("io.apibuilder.api.v0.models.Watch", r, _.validate[io.apibuilder.api.v0.models.Watch])
           case r if r.status == 409 => throw io.apibuilder.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -3188,9 +3253,10 @@ package io.apibuilder.api.v0 {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("DELETE", s"/watches/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("DELETE", s"/watches/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -3229,32 +3295,41 @@ package io.apibuilder.api.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -3345,7 +3420,8 @@ package io.apibuilder.api.v0 {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -3354,7 +3430,8 @@ package io.apibuilder.api.v0 {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3364,7 +3441,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3373,7 +3451,8 @@ package io.apibuilder.api.v0 {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     /**
@@ -3383,7 +3462,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Application]
   }
 
@@ -3401,7 +3481,8 @@ package io.apibuilder.api.v0 {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -3409,7 +3490,8 @@ package io.apibuilder.api.v0 {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3417,7 +3499,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3426,7 +3509,8 @@ package io.apibuilder.api.v0 {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3442,7 +3526,8 @@ package io.apibuilder.api.v0 {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -3460,7 +3545,8 @@ package io.apibuilder.api.v0 {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Code]
   }
 
@@ -3471,7 +3557,8 @@ package io.apibuilder.api.v0 {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -3480,7 +3567,8 @@ package io.apibuilder.api.v0 {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3490,7 +3578,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3507,17 +3596,20 @@ package io.apibuilder.api.v0 {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -3525,7 +3617,8 @@ package io.apibuilder.api.v0 {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3549,22 +3642,26 @@ package io.apibuilder.api.v0 {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, String]]
   }
 
@@ -3578,12 +3675,14 @@ package io.apibuilder.api.v0 {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Item]
   }
 
@@ -3601,7 +3700,8 @@ package io.apibuilder.api.v0 {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -3611,7 +3711,8 @@ package io.apibuilder.api.v0 {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -3620,7 +3721,8 @@ package io.apibuilder.api.v0 {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     /**
@@ -3629,7 +3731,8 @@ package io.apibuilder.api.v0 {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3647,17 +3750,20 @@ package io.apibuilder.api.v0 {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3683,7 +3789,8 @@ package io.apibuilder.api.v0 {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -3691,7 +3798,8 @@ package io.apibuilder.api.v0 {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3699,7 +3807,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3708,7 +3817,8 @@ package io.apibuilder.api.v0 {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3716,7 +3826,8 @@ package io.apibuilder.api.v0 {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     /**
@@ -3732,7 +3843,8 @@ package io.apibuilder.api.v0 {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -3741,7 +3853,8 @@ package io.apibuilder.api.v0 {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3751,7 +3864,8 @@ package io.apibuilder.api.v0 {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3761,7 +3875,8 @@ package io.apibuilder.api.v0 {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3772,7 +3887,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3784,7 +3900,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -3806,7 +3923,8 @@ package io.apibuilder.api.v0 {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -3814,7 +3932,8 @@ package io.apibuilder.api.v0 {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -3822,12 +3941,14 @@ package io.apibuilder.api.v0 {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3841,7 +3962,8 @@ package io.apibuilder.api.v0 {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -3849,7 +3971,8 @@ package io.apibuilder.api.v0 {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -3857,12 +3980,14 @@ package io.apibuilder.api.v0 {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -3879,7 +4004,8 @@ package io.apibuilder.api.v0 {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -3887,7 +4013,8 @@ package io.apibuilder.api.v0 {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3898,7 +4025,8 @@ package io.apibuilder.api.v0 {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3906,7 +4034,8 @@ package io.apibuilder.api.v0 {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3915,14 +4044,16 @@ package io.apibuilder.api.v0 {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -3940,7 +4071,8 @@ package io.apibuilder.api.v0 {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -3953,7 +4085,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3963,7 +4096,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3974,7 +4108,8 @@ package io.apibuilder.api.v0 {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3984,7 +4119,8 @@ package io.apibuilder.api.v0 {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
@@ -4006,7 +4142,8 @@ package io.apibuilder.api.v0 {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -4014,7 +4151,8 @@ package io.apibuilder.api.v0 {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -4027,7 +4165,8 @@ package io.apibuilder.api.v0 {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Boolean]
 
     /**
@@ -4035,12 +4174,14 @@ package io.apibuilder.api.v0 {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
diff --git a/lib/src/test/resources/generators/play-27-built-in-types.txt b/lib/src/test/resources/generators/play-27-built-in-types.txt
index 7ef64819a..361de69f9 100644
--- a/lib/src/test/resources/generators/play-27-built-in-types.txt
+++ b/lib/src/test/resources/generators/play-27-built-in-types.txt
@@ -455,9 +455,10 @@ package apibuilder {
 
     object Arrays extends Arrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array] = {
-        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/arrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Array", r, _.validate[apibuilder.models.Array])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -466,9 +467,10 @@ package apibuilder {
 
     object Optarrays extends Optarrays {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray] = {
-        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optarrays", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optarray", r, _.validate[apibuilder.models.Optarray])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -477,9 +479,10 @@ package apibuilder {
 
     object Optionals extends Optionals {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional] = {
-        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/optionals", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Optional", r, _.validate[apibuilder.models.Optional])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -488,9 +491,10 @@ package apibuilder {
 
     object Requireds extends Requireds {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required] = {
-        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/requireds", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.apibuilder.Client.parseJson("apibuilder.models.Required", r, _.validate[apibuilder.models.Required])
           case r => throw apibuilder.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -529,32 +533,41 @@ package apibuilder {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -609,25 +622,29 @@ package apibuilder {
 
   trait Arrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Array]
   }
 
   trait Optarrays {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optarray]
   }
 
   trait Optionals {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Optional]
   }
 
   trait Requireds {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[apibuilder.models.Required]
   }
 
diff --git a/lib/src/test/resources/generators/play-27-java-instant.txt b/lib/src/test/resources/generators/play-27-java-instant.txt
index b465f8eef..2f37c976f 100644
--- a/lib/src/test/resources/generators/play-27-java-instant.txt
+++ b/lib/src/test/resources/generators/play-27-java-instant.txt
@@ -265,7 +265,8 @@ package io.gregor.time.types.v0 {
         queryDate: _root_.java.time.LocalDate,
         queryTime: _root_.java.time.Instant,
         dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel] = {
         val payload = play.api.libs.json.Json.toJson(dateTimeModel)
 
@@ -274,7 +275,7 @@ package io.gregor.time.types.v0 {
           Some("query_time" -> queryTime.toString)
         ).flatten
 
-        _executeRequest("POST", s"/date_time_models/${play.utils.UriEncoding.encodePathSegment(pathDate.toString, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(pathTime.toString, "UTF-8")}", body = Some(payload), queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/date_time_models/${play.utils.UriEncoding.encodePathSegment(pathDate.toString, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(pathTime.toString, "UTF-8")}", body = Some(payload), queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.gregor.time.types.v0.Client.parseJson("io.gregor.time.types.v0.models.DateTimeModel", r, _.validate[io.gregor.time.types.v0.models.DateTimeModel])
           case r => throw io.gregor.time.types.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -313,32 +314,41 @@ package io.gregor.time.types.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -395,7 +405,8 @@ package io.gregor.time.types.v0 {
       queryDate: _root_.java.time.LocalDate,
       queryTime: _root_.java.time.Instant,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel]
   }
 
diff --git a/lib/src/test/resources/generators/play-27-java-offsetdatetime.txt b/lib/src/test/resources/generators/play-27-java-offsetdatetime.txt
index 73fe376d3..8354a1722 100644
--- a/lib/src/test/resources/generators/play-27-java-offsetdatetime.txt
+++ b/lib/src/test/resources/generators/play-27-java-offsetdatetime.txt
@@ -265,7 +265,8 @@ package io.gregor.time.types.v0 {
         queryDate: _root_.java.time.LocalDate,
         queryTime: _root_.java.time.OffsetDateTime,
         dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel] = {
         val payload = play.api.libs.json.Json.toJson(dateTimeModel)
 
@@ -274,7 +275,7 @@ package io.gregor.time.types.v0 {
           Some("query_time" -> queryTime.toString)
         ).flatten
 
-        _executeRequest("POST", s"/date_time_models/${play.utils.UriEncoding.encodePathSegment(pathDate.toString, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(pathTime.toString, "UTF-8")}", body = Some(payload), queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/date_time_models/${play.utils.UriEncoding.encodePathSegment(pathDate.toString, "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(pathTime.toString, "UTF-8")}", body = Some(payload), queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.gregor.time.types.v0.Client.parseJson("io.gregor.time.types.v0.models.DateTimeModel", r, _.validate[io.gregor.time.types.v0.models.DateTimeModel])
           case r => throw io.gregor.time.types.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -313,32 +314,41 @@ package io.gregor.time.types.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -395,7 +405,8 @@ package io.gregor.time.types.v0 {
       queryDate: _root_.java.time.LocalDate,
       queryTime: _root_.java.time.OffsetDateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel]
   }
 
diff --git a/lib/src/test/resources/generators/play-27-joda-date-time.txt b/lib/src/test/resources/generators/play-27-joda-date-time.txt
index 03979ef68..33d900dba 100644
--- a/lib/src/test/resources/generators/play-27-joda-date-time.txt
+++ b/lib/src/test/resources/generators/play-27-joda-date-time.txt
@@ -291,7 +291,8 @@ package io.gregor.time.types.v0 {
         queryDate: _root_.org.joda.time.LocalDate,
         queryTime: _root_.org.joda.time.DateTime,
         dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel] = {
         val payload = play.api.libs.json.Json.toJson(dateTimeModel)
 
@@ -300,7 +301,7 @@ package io.gregor.time.types.v0 {
           Some("query_time" -> _root_.org.joda.time.format.ISODateTimeFormat.dateTime.print(queryTime))
         ).flatten
 
-        _executeRequest("POST", s"/date_time_models/${play.utils.UriEncoding.encodePathSegment(_root_.org.joda.time.format.ISODateTimeFormat.date.print(pathDate), "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(_root_.org.joda.time.format.ISODateTimeFormat.dateTime.print(pathTime), "UTF-8")}", body = Some(payload), queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/date_time_models/${play.utils.UriEncoding.encodePathSegment(_root_.org.joda.time.format.ISODateTimeFormat.date.print(pathDate), "UTF-8")}/${play.utils.UriEncoding.encodePathSegment(_root_.org.joda.time.format.ISODateTimeFormat.dateTime.print(pathTime), "UTF-8")}", body = Some(payload), queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.gregor.time.types.v0.Client.parseJson("io.gregor.time.types.v0.models.DateTimeModel", r, _.validate[io.gregor.time.types.v0.models.DateTimeModel])
           case r => throw io.gregor.time.types.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -339,32 +340,41 @@ package io.gregor.time.types.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(_withJsonContentType(requestHeaders):_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).addHttpHeaders(requestHeaders:_*).addQueryStringParameters(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -421,7 +431,8 @@ package io.gregor.time.types.v0 {
       queryDate: _root_.org.joda.time.LocalDate,
       queryTime: _root_.org.joda.time.DateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel]
   }
 
diff --git a/lib/src/test/resources/generators/reference-spec-ning-client.txt b/lib/src/test/resources/generators/reference-spec-ning-client.txt
index 3f1a61e5c..bfede5e1a 100644
--- a/lib/src/test/resources/generators/reference-spec-ning-client.txt
+++ b/lib/src/test/resources/generators/reference-spec-ning-client.txt
@@ -456,7 +456,8 @@ package io.apibuilder.reference.api.v0 {
         foo: _root_.scala.Option[String] = None,
         optionalMessages: _root_.scala.Option[Seq[String]] = None,
         requiredMessages: Seq[String],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val queryParameters = Seq(
           foo.map("foo" -> _)
@@ -464,7 +465,7 @@ package io.apibuilder.reference.api.v0 {
           optionalMessages.getOrElse(Nil).map("optional_messages" -> _) ++
           requiredMessages.map("required_messages" -> _)
 
-        _executeRequest("GET", s"/echoes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/echoes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 204 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 204", requestUri = Some(r.getUri))
         }
@@ -473,12 +474,13 @@ package io.apibuilder.reference.api.v0 {
       override def getArraysOnly(
         optionalMessages: _root_.scala.Option[Seq[String]] = None,
         requiredMessages: Seq[String],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val queryParameters = optionalMessages.getOrElse(Nil).map("optional_messages" -> _) ++
           requiredMessages.map("required_messages" -> _)
 
-        _executeRequest("GET", s"/echoes/arrays-only", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/echoes/arrays-only", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 204 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 204", requestUri = Some(r.getUri))
         }
@@ -488,9 +490,10 @@ package io.apibuilder.reference.api.v0 {
     object Groups extends Groups {
       override def getByOrganization(
         organization: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]] = {
-        _executeRequest("GET", s"/groups/${organization}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/groups/${organization}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]", r, _.validate[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -503,7 +506,8 @@ package io.apibuilder.reference.api.v0 {
         organization: _root_.java.util.UUID,
         user: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Member] = {
         val payload = play.api.libs.json.Json.obj(
           "guid" -> play.api.libs.json.Json.toJson(guid),
@@ -512,7 +516,7 @@ package io.apibuilder.reference.api.v0 {
           "role" -> play.api.libs.json.Json.toJson(role)
         )
 
-        _executeRequest("POST", s"/members", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/members", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Member", r, _.validate[io.apibuilder.reference.api.v0.models.Member])
           case r if r.getStatusCode == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201, 409", requestUri = Some(r.getUri))
@@ -524,7 +528,8 @@ package io.apibuilder.reference.api.v0 {
         organizationGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         role: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -533,7 +538,7 @@ package io.apibuilder.reference.api.v0 {
           role.map("role" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/members", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/members", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -541,9 +546,10 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByOrganization(
         organization: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
-        _executeRequest("GET", s"/members/${organization}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/members/${organization}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -552,11 +558,12 @@ package io.apibuilder.reference.api.v0 {
       override def postMembersBulkByOrganization(
         organization: _root_.java.util.UUID,
         members: Seq[io.apibuilder.reference.api.v0.models.Member],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
         val payload = play.api.libs.json.Json.toJson(members)
 
-        _executeRequest("POST", s"/members/${organization}/members_bulk", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/members/${organization}/members_bulk", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -566,13 +573,14 @@ package io.apibuilder.reference.api.v0 {
     object Organizations extends Organizations {
       override def post(
         organization: io.apibuilder.reference.api.v0.models.Organization,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization] = {
         val payload = play.api.libs.json.Json.obj(
           "organization" -> play.api.libs.json.Json.toJson(organization)
         )
 
-        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Organization", r, _.validate[io.apibuilder.reference.api.v0.models.Organization])
           case r if r.getStatusCode == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201, 409", requestUri = Some(r.getUri))
@@ -582,14 +590,15 @@ package io.apibuilder.reference.api.v0 {
       override def get(
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         name: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Organization]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
           name.map("name" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Organization]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Organization]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -597,9 +606,10 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization] = {
-        _executeRequest("GET", s"/organizations/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Organization", r, _.validate[io.apibuilder.reference.api.v0.models.Organization])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -611,7 +621,8 @@ package io.apibuilder.reference.api.v0 {
         guid: _root_.java.util.UUID,
         email: String,
         active: Boolean,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.obj(
           "guid" -> play.api.libs.json.Json.toJson(guid),
@@ -619,7 +630,7 @@ package io.apibuilder.reference.api.v0 {
           "active" -> play.api.libs.json.Json.toJson(active)
         )
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.User", r, _.validate[io.apibuilder.reference.api.v0.models.User])
           case r if r.getStatusCode == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201, 409", requestUri = Some(r.getUri))
@@ -632,7 +643,8 @@ package io.apibuilder.reference.api.v0 {
         ageGroup: _root_.scala.Option[io.apibuilder.reference.api.v0.models.AgeGroup] = None,
         email: _root_.scala.Option[String] = None,
         active: Boolean = true,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -642,7 +654,7 @@ package io.apibuilder.reference.api.v0 {
         ).flatten ++
           organizationGuids.getOrElse(Nil).map("organization_guids" -> _.toString)
 
-        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.User]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -650,18 +662,20 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByAgeGroup(
         ageGroup: io.apibuilder.reference.api.v0.models.AgeGroup,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]] = {
-        _executeRequest("GET", s"/users/${_root_.io.apibuilder.reference.api.v0.PathSegment.encode(ageGroup.toString, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${_root_.io.apibuilder.reference.api.v0.PathSegment.encode(ageGroup.toString, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.User]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
       }
 
       override def postNoop(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("POST", s"/users/noop", requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users/noop", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -680,8 +694,8 @@ package io.apibuilder.reference.api.v0 {
       }
     }
 
-    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): RequestBuilder = {
-      val builder = new RequestBuilder(method)
+    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): _root_.com.ning.http.client.RequestBuilder = {
+      val builder = new _root_.com.ning.http.client.RequestBuilder(method)
         .setUrl(baseUrl + path)
         .addHeader("User-Agent", Constants.UserAgent)
         .addHeader("X-Apidoc-Version", Constants.Version)
@@ -710,7 +724,8 @@ package io.apibuilder.reference.api.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.ning.http.client.Response] = {
       val allHeaders = body match {
         case None => requestHeaders
@@ -728,7 +743,7 @@ package io.apibuilder.reference.api.v0 {
         request.setBody(serialized)
       }
 
-      val finalRequest = requestWithParamsAndBody.build()
+      val finalRequest = requestModifier(requestWithParamsAndBody).build()
       _logRequest(finalRequest)
 
       val result = scala.concurrent.Promise[com.ning.http.client.Response]()
@@ -805,20 +820,23 @@ package io.apibuilder.reference.api.v0 {
       foo: _root_.scala.Option[String] = None,
       optionalMessages: _root_.scala.Option[Seq[String]] = None,
       requiredMessages: Seq[String],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     def getArraysOnly(
       optionalMessages: _root_.scala.Option[Seq[String]] = None,
       requiredMessages: Seq[String],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
   trait Groups {
     def getByOrganization(
       organization: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]]
   }
 
@@ -828,7 +846,8 @@ package io.apibuilder.reference.api.v0 {
       organization: _root_.java.util.UUID,
       user: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Member]
 
     def get(
@@ -836,36 +855,42 @@ package io.apibuilder.reference.api.v0 {
       organizationGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       role: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
 
     def getByOrganization(
       organization: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
 
     def postMembersBulkByOrganization(
       organization: _root_.java.util.UUID,
       members: Seq[io.apibuilder.reference.api.v0.models.Member],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
   }
 
   trait Organizations {
     def post(
       organization: io.apibuilder.reference.api.v0.models.Organization,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization]
 
     def get(
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       name: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Organization]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization]
   }
 
@@ -874,7 +899,8 @@ package io.apibuilder.reference.api.v0 {
       guid: _root_.java.util.UUID,
       email: String,
       active: Boolean,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.User]
 
     /**
@@ -887,16 +913,19 @@ package io.apibuilder.reference.api.v0 {
       ageGroup: _root_.scala.Option[io.apibuilder.reference.api.v0.models.AgeGroup] = None,
       email: _root_.scala.Option[String] = None,
       active: Boolean = true,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]]
 
     def getByAgeGroup(
       ageGroup: io.apibuilder.reference.api.v0.models.AgeGroup,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]]
 
     def postNoop(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
diff --git a/lib/src/test/resources/generators/reference-spec-play-23.txt b/lib/src/test/resources/generators/reference-spec-play-23.txt
index 7c2b72903..3bc895fe7 100644
--- a/lib/src/test/resources/generators/reference-spec-play-23.txt
+++ b/lib/src/test/resources/generators/reference-spec-play-23.txt
@@ -562,7 +562,8 @@ package io.apibuilder.reference.api.v0 {
         foo: _root_.scala.Option[String] = None,
         optionalMessages: _root_.scala.Option[Seq[String]] = None,
         requiredMessages: Seq[String],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val queryParameters = Seq(
           foo.map("foo" -> _)
@@ -570,7 +571,7 @@ package io.apibuilder.reference.api.v0 {
           optionalMessages.getOrElse(Nil).map("optional_messages" -> _) ++
           requiredMessages.map("required_messages" -> _)
 
-        _executeRequest("GET", s"/echoes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/echoes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -579,12 +580,13 @@ package io.apibuilder.reference.api.v0 {
       override def getArraysOnly(
         optionalMessages: _root_.scala.Option[Seq[String]] = None,
         requiredMessages: Seq[String],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val queryParameters = optionalMessages.getOrElse(Nil).map("optional_messages" -> _) ++
           requiredMessages.map("required_messages" -> _)
 
-        _executeRequest("GET", s"/echoes/arrays-only", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/echoes/arrays-only", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -594,9 +596,10 @@ package io.apibuilder.reference.api.v0 {
     object Groups extends Groups {
       override def getByOrganization(
         organization: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]] = {
-        _executeRequest("GET", s"/groups/${organization}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/groups/${organization}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]", r, _.validate[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -609,7 +612,8 @@ package io.apibuilder.reference.api.v0 {
         organization: _root_.java.util.UUID,
         user: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Member] = {
         val payload = play.api.libs.json.Json.obj(
           "guid" -> play.api.libs.json.Json.toJson(guid),
@@ -618,7 +622,7 @@ package io.apibuilder.reference.api.v0 {
           "role" -> play.api.libs.json.Json.toJson(role)
         )
 
-        _executeRequest("POST", s"/members", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/members", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Member", r, _.validate[io.apibuilder.reference.api.v0.models.Member])
           case r if r.status == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -630,7 +634,8 @@ package io.apibuilder.reference.api.v0 {
         organizationGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         role: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -639,7 +644,7 @@ package io.apibuilder.reference.api.v0 {
           role.map("role" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/members", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/members", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -647,9 +652,10 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByOrganization(
         organization: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
-        _executeRequest("GET", s"/members/${organization}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/members/${organization}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -658,11 +664,12 @@ package io.apibuilder.reference.api.v0 {
       override def postMembersBulkByOrganization(
         organization: _root_.java.util.UUID,
         members: Seq[io.apibuilder.reference.api.v0.models.Member],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
         val payload = play.api.libs.json.Json.toJson(members)
 
-        _executeRequest("POST", s"/members/${organization}/members_bulk", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/members/${organization}/members_bulk", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -672,13 +679,14 @@ package io.apibuilder.reference.api.v0 {
     object Organizations extends Organizations {
       override def post(
         organization: io.apibuilder.reference.api.v0.models.Organization,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization] = {
         val payload = play.api.libs.json.Json.obj(
           "organization" -> play.api.libs.json.Json.toJson(organization)
         )
 
-        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Organization", r, _.validate[io.apibuilder.reference.api.v0.models.Organization])
           case r if r.status == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -688,14 +696,15 @@ package io.apibuilder.reference.api.v0 {
       override def get(
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         name: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Organization]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
           name.map("name" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Organization]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Organization]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -703,9 +712,10 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization] = {
-        _executeRequest("GET", s"/organizations/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Organization", r, _.validate[io.apibuilder.reference.api.v0.models.Organization])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -717,7 +727,8 @@ package io.apibuilder.reference.api.v0 {
         guid: _root_.java.util.UUID,
         email: String,
         active: Boolean,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.obj(
           "guid" -> play.api.libs.json.Json.toJson(guid),
@@ -725,7 +736,7 @@ package io.apibuilder.reference.api.v0 {
           "active" -> play.api.libs.json.Json.toJson(active)
         )
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.User", r, _.validate[io.apibuilder.reference.api.v0.models.User])
           case r if r.status == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -738,7 +749,8 @@ package io.apibuilder.reference.api.v0 {
         ageGroup: _root_.scala.Option[io.apibuilder.reference.api.v0.models.AgeGroup] = None,
         email: _root_.scala.Option[String] = None,
         active: Boolean = true,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -748,7 +760,7 @@ package io.apibuilder.reference.api.v0 {
         ).flatten ++
           organizationGuids.getOrElse(Nil).map("organization_guids" -> _.toString)
 
-        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.User]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -756,18 +768,20 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByAgeGroup(
         ageGroup: io.apibuilder.reference.api.v0.models.AgeGroup,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]] = {
-        _executeRequest("GET", s"/users/${play.utils.UriEncoding.encodePathSegment(ageGroup.toString, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${play.utils.UriEncoding.encodePathSegment(ageGroup.toString, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.User]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
       }
 
       override def postNoop(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("POST", s"/users/noop", requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users/noop", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -807,32 +821,41 @@ package io.apibuilder.reference.api.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -891,20 +914,23 @@ package io.apibuilder.reference.api.v0 {
       foo: _root_.scala.Option[String] = None,
       optionalMessages: _root_.scala.Option[Seq[String]] = None,
       requiredMessages: Seq[String],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     def getArraysOnly(
       optionalMessages: _root_.scala.Option[Seq[String]] = None,
       requiredMessages: Seq[String],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
   trait Groups {
     def getByOrganization(
       organization: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]]
   }
 
@@ -914,7 +940,8 @@ package io.apibuilder.reference.api.v0 {
       organization: _root_.java.util.UUID,
       user: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Member]
 
     def get(
@@ -922,36 +949,42 @@ package io.apibuilder.reference.api.v0 {
       organizationGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       role: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
 
     def getByOrganization(
       organization: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
 
     def postMembersBulkByOrganization(
       organization: _root_.java.util.UUID,
       members: Seq[io.apibuilder.reference.api.v0.models.Member],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
   }
 
   trait Organizations {
     def post(
       organization: io.apibuilder.reference.api.v0.models.Organization,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization]
 
     def get(
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       name: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Organization]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization]
   }
 
@@ -960,7 +993,8 @@ package io.apibuilder.reference.api.v0 {
       guid: _root_.java.util.UUID,
       email: String,
       active: Boolean,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.User]
 
     /**
@@ -973,16 +1007,19 @@ package io.apibuilder.reference.api.v0 {
       ageGroup: _root_.scala.Option[io.apibuilder.reference.api.v0.models.AgeGroup] = None,
       email: _root_.scala.Option[String] = None,
       active: Boolean = true,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]]
 
     def getByAgeGroup(
       ageGroup: io.apibuilder.reference.api.v0.models.AgeGroup,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]]
 
     def postNoop(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
diff --git a/lib/src/test/resources/generators/reference-with-imports-spec-ning-client.txt b/lib/src/test/resources/generators/reference-with-imports-spec-ning-client.txt
index e08be8b8e..9e008966f 100644
--- a/lib/src/test/resources/generators/reference-with-imports-spec-ning-client.txt
+++ b/lib/src/test/resources/generators/reference-with-imports-spec-ning-client.txt
@@ -458,7 +458,8 @@ package io.apibuilder.reference.api.v0 {
         foo: _root_.scala.Option[String] = None,
         optionalMessages: _root_.scala.Option[Seq[String]] = None,
         requiredMessages: Seq[String],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val queryParameters = Seq(
           foo.map("foo" -> _)
@@ -466,7 +467,7 @@ package io.apibuilder.reference.api.v0 {
           optionalMessages.getOrElse(Nil).map("optional_messages" -> _) ++
           requiredMessages.map("required_messages" -> _)
 
-        _executeRequest("GET", s"/echoes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/echoes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 204 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 204", requestUri = Some(r.getUri))
         }
@@ -475,12 +476,13 @@ package io.apibuilder.reference.api.v0 {
       override def getArraysOnly(
         optionalMessages: _root_.scala.Option[Seq[String]] = None,
         requiredMessages: Seq[String],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val queryParameters = optionalMessages.getOrElse(Nil).map("optional_messages" -> _) ++
           requiredMessages.map("required_messages" -> _)
 
-        _executeRequest("GET", s"/echoes/arrays-only", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/echoes/arrays-only", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 204 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 204", requestUri = Some(r.getUri))
         }
@@ -490,9 +492,10 @@ package io.apibuilder.reference.api.v0 {
     object Groups extends Groups {
       override def getByOrganization(
         organization: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]] = {
-        _executeRequest("GET", s"/groups/${organization}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/groups/${organization}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]", r, _.validate[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -505,7 +508,8 @@ package io.apibuilder.reference.api.v0 {
         organization: _root_.java.util.UUID,
         user: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Member] = {
         val payload = play.api.libs.json.Json.obj(
           "guid" -> play.api.libs.json.Json.toJson(guid),
@@ -514,7 +518,7 @@ package io.apibuilder.reference.api.v0 {
           "role" -> play.api.libs.json.Json.toJson(role)
         )
 
-        _executeRequest("POST", s"/members", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/members", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Member", r, _.validate[io.apibuilder.reference.api.v0.models.Member])
           case r if r.getStatusCode == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201, 409", requestUri = Some(r.getUri))
@@ -526,7 +530,8 @@ package io.apibuilder.reference.api.v0 {
         organizationGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         role: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -535,7 +540,7 @@ package io.apibuilder.reference.api.v0 {
           role.map("role" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/members", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/members", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -543,9 +548,10 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByOrganization(
         organization: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
-        _executeRequest("GET", s"/members/${organization}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/members/${organization}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -554,11 +560,12 @@ package io.apibuilder.reference.api.v0 {
       override def postMembersBulkByOrganization(
         organization: _root_.java.util.UUID,
         members: Seq[io.apibuilder.reference.api.v0.models.Member],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
         val payload = play.api.libs.json.Json.toJson(members)
 
-        _executeRequest("POST", s"/members/${organization}/members_bulk", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/members/${organization}/members_bulk", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -568,13 +575,14 @@ package io.apibuilder.reference.api.v0 {
     object Organizations extends Organizations {
       override def postOrganizations(
         organization: io.apibuilder.reference.api.v0.models.Organization,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization] = {
         val payload = play.api.libs.json.Json.obj(
           "organization" -> play.api.libs.json.Json.toJson(organization)
         )
 
-        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Organization", r, _.validate[io.apibuilder.reference.api.v0.models.Organization])
           case r if r.getStatusCode == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201, 409", requestUri = Some(r.getUri))
@@ -584,14 +592,15 @@ package io.apibuilder.reference.api.v0 {
       override def getOrganizations(
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         name: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Organization]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
           name.map("name" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Organization]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Organization]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -599,9 +608,10 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization] = {
-        _executeRequest("GET", s"/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Organization", r, _.validate[io.apibuilder.reference.api.v0.models.Organization])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -613,7 +623,8 @@ package io.apibuilder.reference.api.v0 {
         guid: _root_.java.util.UUID,
         email: String,
         active: Boolean,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.obj(
           "guid" -> play.api.libs.json.Json.toJson(guid),
@@ -621,7 +632,7 @@ package io.apibuilder.reference.api.v0 {
           "active" -> play.api.libs.json.Json.toJson(active)
         )
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.User", r, _.validate[io.apibuilder.reference.api.v0.models.User])
           case r if r.getStatusCode == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 201, 409", requestUri = Some(r.getUri))
@@ -634,7 +645,8 @@ package io.apibuilder.reference.api.v0 {
         ageGroup: _root_.scala.Option[io.apibuilder.reference.api.v0.models.AgeGroup] = None,
         email: _root_.scala.Option[String] = None,
         active: Boolean = true,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -644,7 +656,7 @@ package io.apibuilder.reference.api.v0 {
         ).flatten ++
           organizationGuids.getOrElse(Nil).map("organization_guids" -> _.toString)
 
-        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.User]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -652,18 +664,20 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByAgeGroup(
         ageGroup: io.apibuilder.reference.api.v0.models.AgeGroup,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]] = {
-        _executeRequest("GET", s"/users/${_root_.io.apibuilder.reference.api.v0.PathSegment.encode(ageGroup.toString, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${_root_.io.apibuilder.reference.api.v0.PathSegment.encode(ageGroup.toString, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.User]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
       }
 
       override def postNoop(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("POST", s"/users/noop", requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users/noop", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.getStatusCode == 200 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.getStatusCode, s"Unsupported response code[${r.getStatusCode}]. Expected: 200", requestUri = Some(r.getUri))
         }
@@ -682,8 +696,8 @@ package io.apibuilder.reference.api.v0 {
       }
     }
 
-    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): RequestBuilder = {
-      val builder = new RequestBuilder(method)
+    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): _root_.com.ning.http.client.RequestBuilder = {
+      val builder = new _root_.com.ning.http.client.RequestBuilder(method)
         .setUrl(baseUrl + path)
         .addHeader("User-Agent", Constants.UserAgent)
         .addHeader("X-Apidoc-Version", Constants.Version)
@@ -712,7 +726,8 @@ package io.apibuilder.reference.api.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[com.ning.http.client.Response] = {
       val allHeaders = body match {
         case None => requestHeaders
@@ -730,7 +745,7 @@ package io.apibuilder.reference.api.v0 {
         request.setBody(serialized)
       }
 
-      val finalRequest = requestWithParamsAndBody.build()
+      val finalRequest = requestModifier(requestWithParamsAndBody).build()
       _logRequest(finalRequest)
 
       val result = scala.concurrent.Promise[com.ning.http.client.Response]()
@@ -807,20 +822,23 @@ package io.apibuilder.reference.api.v0 {
       foo: _root_.scala.Option[String] = None,
       optionalMessages: _root_.scala.Option[Seq[String]] = None,
       requiredMessages: Seq[String],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     def getArraysOnly(
       optionalMessages: _root_.scala.Option[Seq[String]] = None,
       requiredMessages: Seq[String],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
   trait Groups {
     def getByOrganization(
       organization: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]]
   }
 
@@ -830,7 +848,8 @@ package io.apibuilder.reference.api.v0 {
       organization: _root_.java.util.UUID,
       user: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Member]
 
     def get(
@@ -838,36 +857,42 @@ package io.apibuilder.reference.api.v0 {
       organizationGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       role: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
 
     def getByOrganization(
       organization: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
 
     def postMembersBulkByOrganization(
       organization: _root_.java.util.UUID,
       members: Seq[io.apibuilder.reference.api.v0.models.Member],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
   }
 
   trait Organizations {
     def postOrganizations(
       organization: io.apibuilder.reference.api.v0.models.Organization,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization]
 
     def getOrganizations(
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       name: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Organization]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization]
   }
 
@@ -876,7 +901,8 @@ package io.apibuilder.reference.api.v0 {
       guid: _root_.java.util.UUID,
       email: String,
       active: Boolean,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.User]
 
     /**
@@ -889,16 +915,19 @@ package io.apibuilder.reference.api.v0 {
       ageGroup: _root_.scala.Option[io.apibuilder.reference.api.v0.models.AgeGroup] = None,
       email: _root_.scala.Option[String] = None,
       active: Boolean = true,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]]
 
     def getByAgeGroup(
       ageGroup: io.apibuilder.reference.api.v0.models.AgeGroup,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]]
 
     def postNoop(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: _root_.com.ning.http.client.RequestBuilder => _root_.com.ning.http.client.RequestBuilder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
diff --git a/lib/src/test/resources/generators/reference-with-imports-spec-play-23.txt b/lib/src/test/resources/generators/reference-with-imports-spec-play-23.txt
index de357da47..d9a735385 100644
--- a/lib/src/test/resources/generators/reference-with-imports-spec-play-23.txt
+++ b/lib/src/test/resources/generators/reference-with-imports-spec-play-23.txt
@@ -564,7 +564,8 @@ package io.apibuilder.reference.api.v0 {
         foo: _root_.scala.Option[String] = None,
         optionalMessages: _root_.scala.Option[Seq[String]] = None,
         requiredMessages: Seq[String],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val queryParameters = Seq(
           foo.map("foo" -> _)
@@ -572,7 +573,7 @@ package io.apibuilder.reference.api.v0 {
           optionalMessages.getOrElse(Nil).map("optional_messages" -> _) ++
           requiredMessages.map("required_messages" -> _)
 
-        _executeRequest("GET", s"/echoes", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/echoes", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -581,12 +582,13 @@ package io.apibuilder.reference.api.v0 {
       override def getArraysOnly(
         optionalMessages: _root_.scala.Option[Seq[String]] = None,
         requiredMessages: Seq[String],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
         val queryParameters = optionalMessages.getOrElse(Nil).map("optional_messages" -> _) ++
           requiredMessages.map("required_messages" -> _)
 
-        _executeRequest("GET", s"/echoes/arrays-only", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/echoes/arrays-only", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 204 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 204")
         }
@@ -596,9 +598,10 @@ package io.apibuilder.reference.api.v0 {
     object Groups extends Groups {
       override def getByOrganization(
         organization: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]] = {
-        _executeRequest("GET", s"/groups/${organization}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/groups/${organization}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]", r, _.validate[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -611,7 +614,8 @@ package io.apibuilder.reference.api.v0 {
         organization: _root_.java.util.UUID,
         user: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Member] = {
         val payload = play.api.libs.json.Json.obj(
           "guid" -> play.api.libs.json.Json.toJson(guid),
@@ -620,7 +624,7 @@ package io.apibuilder.reference.api.v0 {
           "role" -> play.api.libs.json.Json.toJson(role)
         )
 
-        _executeRequest("POST", s"/members", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/members", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Member", r, _.validate[io.apibuilder.reference.api.v0.models.Member])
           case r if r.status == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -632,7 +636,8 @@ package io.apibuilder.reference.api.v0 {
         organizationGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         role: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -641,7 +646,7 @@ package io.apibuilder.reference.api.v0 {
           role.map("role" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/members", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/members", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -649,9 +654,10 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByOrganization(
         organization: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
-        _executeRequest("GET", s"/members/${organization}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/members/${organization}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -660,11 +666,12 @@ package io.apibuilder.reference.api.v0 {
       override def postMembersBulkByOrganization(
         organization: _root_.java.util.UUID,
         members: Seq[io.apibuilder.reference.api.v0.models.Member],
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]] = {
         val payload = play.api.libs.json.Json.toJson(members)
 
-        _executeRequest("POST", s"/members/${organization}/members_bulk", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/members/${organization}/members_bulk", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Member]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Member]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -674,13 +681,14 @@ package io.apibuilder.reference.api.v0 {
     object Organizations extends Organizations {
       override def postOrganizations(
         organization: io.apibuilder.reference.api.v0.models.Organization,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization] = {
         val payload = play.api.libs.json.Json.obj(
           "organization" -> play.api.libs.json.Json.toJson(organization)
         )
 
-        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/organizations", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Organization", r, _.validate[io.apibuilder.reference.api.v0.models.Organization])
           case r if r.status == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -690,14 +698,15 @@ package io.apibuilder.reference.api.v0 {
       override def getOrganizations(
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         name: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Organization]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
           name.map("name" -> _)
         ).flatten
 
-        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/organizations", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.Organization]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.Organization]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -705,9 +714,10 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization] = {
-        _executeRequest("GET", s"/${guid}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/${guid}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.Organization", r, _.validate[io.apibuilder.reference.api.v0.models.Organization])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -719,7 +729,8 @@ package io.apibuilder.reference.api.v0 {
         guid: _root_.java.util.UUID,
         email: String,
         active: Boolean,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.User] = {
         val payload = play.api.libs.json.Json.obj(
           "guid" -> play.api.libs.json.Json.toJson(guid),
@@ -727,7 +738,7 @@ package io.apibuilder.reference.api.v0 {
           "active" -> play.api.libs.json.Json.toJson(active)
         )
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("io.apibuilder.reference.api.v0.models.User", r, _.validate[io.apibuilder.reference.api.v0.models.User])
           case r if r.status == 409 => throw io.apibuilder.reference.api.v0.errors.ErrorsResponse(r)
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201, 409")
@@ -740,7 +751,8 @@ package io.apibuilder.reference.api.v0 {
         ageGroup: _root_.scala.Option[io.apibuilder.reference.api.v0.models.AgeGroup] = None,
         email: _root_.scala.Option[String] = None,
         active: Boolean = true,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]] = {
         val queryParameters = Seq(
           guid.map("guid" -> _.toString),
@@ -750,7 +762,7 @@ package io.apibuilder.reference.api.v0 {
         ).flatten ++
           organizationGuids.getOrElse(Nil).map("organization_guids" -> _.toString)
 
-        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.User]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -758,18 +770,20 @@ package io.apibuilder.reference.api.v0 {
 
       override def getByAgeGroup(
         ageGroup: io.apibuilder.reference.api.v0.models.AgeGroup,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]] = {
-        _executeRequest("GET", s"/users/${play.utils.UriEncoding.encodePathSegment(ageGroup.toString, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${play.utils.UriEncoding.encodePathSegment(ageGroup.toString, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.reference.api.v0.Client.parseJson("Seq[io.apibuilder.reference.api.v0.models.User]", r, _.validate[Seq[io.apibuilder.reference.api.v0.models.User]])
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
       }
 
       override def postNoop(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit] = {
-        _executeRequest("POST", s"/users/noop", requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users/noop", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => ()
           case r => throw io.apibuilder.reference.api.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -809,32 +823,41 @@ package io.apibuilder.reference.api.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -893,20 +916,23 @@ package io.apibuilder.reference.api.v0 {
       foo: _root_.scala.Option[String] = None,
       optionalMessages: _root_.scala.Option[Seq[String]] = None,
       requiredMessages: Seq[String],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
 
     def getArraysOnly(
       optionalMessages: _root_.scala.Option[Seq[String]] = None,
       requiredMessages: Seq[String],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
   trait Groups {
     def getByOrganization(
       organization: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, Seq[io.apibuilder.reference.api.v0.models.User]]]
   }
 
@@ -916,7 +942,8 @@ package io.apibuilder.reference.api.v0 {
       organization: _root_.java.util.UUID,
       user: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Member]
 
     def get(
@@ -924,36 +951,42 @@ package io.apibuilder.reference.api.v0 {
       organizationGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       role: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
 
     def getByOrganization(
       organization: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
 
     def postMembersBulkByOrganization(
       organization: _root_.java.util.UUID,
       members: Seq[io.apibuilder.reference.api.v0.models.Member],
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Member]]
   }
 
   trait Organizations {
     def postOrganizations(
       organization: io.apibuilder.reference.api.v0.models.Organization,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization]
 
     def getOrganizations(
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       name: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.Organization]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.Organization]
   }
 
@@ -962,7 +995,8 @@ package io.apibuilder.reference.api.v0 {
       guid: _root_.java.util.UUID,
       email: String,
       active: Boolean,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.reference.api.v0.models.User]
 
     /**
@@ -975,16 +1009,19 @@ package io.apibuilder.reference.api.v0 {
       ageGroup: _root_.scala.Option[io.apibuilder.reference.api.v0.models.AgeGroup] = None,
       email: _root_.scala.Option[String] = None,
       active: Boolean = true,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]]
 
     def getByAgeGroup(
       ageGroup: io.apibuilder.reference.api.v0.models.AgeGroup,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.reference.api.v0.models.User]]
 
     def postNoop(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Unit]
   }
 
diff --git a/lib/src/test/resources/generators/scala-primitive-object-response-list.txt b/lib/src/test/resources/generators/scala-primitive-object-response-list.txt
index ff8b7b040..5b916007c 100644
--- a/lib/src/test/resources/generators/scala-primitive-object-response-list.txt
+++ b/lib/src/test/resources/generators/scala-primitive-object-response-list.txt
@@ -1,8 +1,9 @@
 object Contents extends Contents {
   override def get(
-    requestHeaders: Seq[(String, String)] = Nil
+    requestHeaders: Seq[(String, String)] = Nil,
+    requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
   )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[_root_.play.api.libs.json.JsObject]] = {
-    _executeRequest("GET", s"/contents/data", requestHeaders = requestHeaders).map {
+    _executeRequest("GET", s"/contents/data", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
       case r if r.status == 200 => _root_.test.apidoc.Client.parseJson("Seq[_root_.play.api.libs.json.JsObject]", r, _.validate[Seq[_root_.play.api.libs.json.JsObject]])
       case r => throw test.apidoc.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
     }
diff --git a/lib/src/test/resources/generators/scala-primitive-object-response-map.txt b/lib/src/test/resources/generators/scala-primitive-object-response-map.txt
index 4eac39383..c72524fda 100644
--- a/lib/src/test/resources/generators/scala-primitive-object-response-map.txt
+++ b/lib/src/test/resources/generators/scala-primitive-object-response-map.txt
@@ -1,8 +1,9 @@
 object Contents extends Contents {
   override def get(
-    requestHeaders: Seq[(String, String)] = Nil
+    requestHeaders: Seq[(String, String)] = Nil,
+    requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
   )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Map[String, _root_.play.api.libs.json.JsObject]] = {
-    _executeRequest("GET", s"/contents/data", requestHeaders = requestHeaders).map {
+    _executeRequest("GET", s"/contents/data", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
       case r if r.status == 200 => _root_.test.apidoc.Client.parseJson("Map[String, _root_.play.api.libs.json.JsObject]", r, _.validate[Map[String, _root_.play.api.libs.json.JsObject]])
       case r => throw test.apidoc.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
     }
diff --git a/lib/src/test/resources/generators/scala-primitive-object-response-singleton.txt b/lib/src/test/resources/generators/scala-primitive-object-response-singleton.txt
index 563c4af53..ed1b1f534 100644
--- a/lib/src/test/resources/generators/scala-primitive-object-response-singleton.txt
+++ b/lib/src/test/resources/generators/scala-primitive-object-response-singleton.txt
@@ -1,8 +1,9 @@
 object Contents extends Contents {
   override def get(
-    requestHeaders: Seq[(String, String)] = Nil
+    requestHeaders: Seq[(String, String)] = Nil,
+    requestModifier: play.api.libs.ws.WSRequestHolder => play.api.libs.ws.WSRequestHolder = identity
   )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[_root_.play.api.libs.json.JsObject] = {
-    _executeRequest("GET", s"/contents/data", requestHeaders = requestHeaders).map {
+    _executeRequest("GET", s"/contents/data", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
       case r if r.status == 200 => _root_.test.apidoc.Client.parseJson("_root_.play.api.libs.json.JsObject", r, _.validate[_root_.play.api.libs.json.JsObject])
       case r => throw test.apidoc.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
     }
diff --git a/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0Client.scala.txt b/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0Client.scala.txt
index 8a0279756..2af722b7a 100644
--- a/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0Client.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0Client.scala.txt
@@ -1885,7 +1885,8 @@ def closeAsyncHttpClient(): Unit = {
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Application]] = {
         val urlPath = Seq(orgKey)
 
@@ -1898,7 +1899,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Application]]("Seq[io.apibuilder.api.v0.models.Application]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1907,13 +1908,14 @@ def closeAsyncHttpClient(): Unit = {
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1924,13 +1926,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1940,11 +1943,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq(orgKey, applicationKey)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1954,13 +1958,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey, "move")
 
         val (payload, formPayload) = (Some(moveForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1974,7 +1979,8 @@ def closeAsyncHttpClient(): Unit = {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val urlPath = Seq("attributes")
 
@@ -1985,7 +1991,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Attribute]]("Seq[io.apibuilder.api.v0.models.Attribute]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1993,11 +1999,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2006,13 +2013,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes")
 
         val (payload, formPayload) = (Some(attributeForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 401 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
@@ -2022,11 +2030,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 401 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2041,7 +2050,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Change]] = {
         val urlPath = Seq("changes")
 
@@ -2052,7 +2062,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Change]]("Seq[io.apibuilder.api.v0.models.Change]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2065,11 +2075,12 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Code] = {
         val urlPath = Seq(orgKey, applicationKey, version, generatorKey)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Code]("io.apibuilder.api.v0.models.Code", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
@@ -2082,13 +2093,14 @@ def closeAsyncHttpClient(): Unit = {
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Domain] = {
         val urlPath = Seq("domains", orgKey)
 
         val (payload, formPayload) = (Some(domain), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Domain]("io.apibuilder.api.v0.models.Domain", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2098,11 +2110,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("domains", orgKey, name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2112,13 +2125,14 @@ def closeAsyncHttpClient(): Unit = {
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("email_verification_confirmations")
 
         val (payload, formPayload) = (Some(emailVerificationConfirmationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2133,7 +2147,8 @@ def closeAsyncHttpClient(): Unit = {
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val urlPath = Seq("generator_services")
 
@@ -2145,7 +2160,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.GeneratorService]]("Seq[io.apibuilder.api.v0.models.GeneratorService]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2153,11 +2168,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2166,13 +2182,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services")
 
         val (payload, formPayload) = (Some(generatorServiceForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2181,11 +2198,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 403 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2203,7 +2221,8 @@ def closeAsyncHttpClient(): Unit = {
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val urlPath = Seq("generators")
 
@@ -2217,7 +2236,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2225,11 +2244,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorWithService] = {
         val urlPath = Seq("generators", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorWithService]("io.apibuilder.api.v0.models.GeneratorWithService", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2239,22 +2259,24 @@ def closeAsyncHttpClient(): Unit = {
 
     object Healthchecks extends Healthchecks {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.generator.v0.models.Healthcheck] = {
         val urlPath = Seq("_internal_", "healthcheck")
 
-        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.generator.v0.models.Healthcheck]("io.apibuilder.generator.v0.models.Healthcheck", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Map[String, String]] = {
         val urlPath = Seq("_internal_", "migrate")
 
-        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Map[String, String]]("Map[String, String]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2266,7 +2288,8 @@ def closeAsyncHttpClient(): Unit = {
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Item]] = {
         val urlPath = Seq("items")
 
@@ -2276,7 +2299,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Item]]("Seq[io.apibuilder.api.v0.models.Item]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2284,11 +2307,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Item] = {
         val urlPath = Seq("items", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Item]("io.apibuilder.api.v0.models.Item", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2304,7 +2328,8 @@ def closeAsyncHttpClient(): Unit = {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val urlPath = Seq("membership_requests")
 
@@ -2317,7 +2342,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.MembershipRequest]]("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2327,7 +2352,8 @@ def closeAsyncHttpClient(): Unit = {
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.MembershipRequest] = {
         val urlPath = Seq("membership_requests")
 
@@ -2338,7 +2364,7 @@ def closeAsyncHttpClient(): Unit = {
           "role" -> role
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.MembershipRequest]("io.apibuilder.api.v0.models.MembershipRequest", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2347,11 +2373,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "accept")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2360,11 +2387,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "decline")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2380,7 +2408,8 @@ def closeAsyncHttpClient(): Unit = {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val urlPath = Seq("memberships")
 
@@ -2393,7 +2422,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Membership]]("Seq[io.apibuilder.api.v0.models.Membership]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2401,11 +2430,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Membership] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Membership]("io.apibuilder.api.v0.models.Membership", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2414,11 +2444,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2434,7 +2465,8 @@ def closeAsyncHttpClient(): Unit = {
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val urlPath = Seq("organizations")
 
@@ -2448,7 +2480,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Organization]]("Seq[io.apibuilder.api.v0.models.Organization]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2456,11 +2488,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2469,13 +2502,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations")
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2485,13 +2519,14 @@ def closeAsyncHttpClient(): Unit = {
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2500,11 +2535,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2515,7 +2551,8 @@ def closeAsyncHttpClient(): Unit = {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val urlPath = Seq("organizations", key, "attributes")
 
@@ -2525,7 +2562,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.AttributeValue]]("Seq[io.apibuilder.api.v0.models.AttributeValue]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2534,11 +2571,12 @@ def closeAsyncHttpClient(): Unit = {
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2549,13 +2587,14 @@ def closeAsyncHttpClient(): Unit = {
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
         val (payload, formPayload) = (Some(attributeValueForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2567,11 +2606,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 401 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2583,13 +2623,14 @@ def closeAsyncHttpClient(): Unit = {
     object PasswordResetRequests extends PasswordResetRequests {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("password_reset_requests")
 
         val (payload, formPayload) = (Some(passwordResetRequest), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2600,13 +2641,14 @@ def closeAsyncHttpClient(): Unit = {
     object PasswordResets extends PasswordResets {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val urlPath = Seq("password_resets")
 
         val (payload, formPayload) = (Some(passwordReset), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.PasswordResetSuccess]("io.apibuilder.api.v0.models.PasswordResetSuccess", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2622,7 +2664,8 @@ def closeAsyncHttpClient(): Unit = {
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val urlPath = Seq("subscriptions")
 
@@ -2635,7 +2678,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Subscription]]("Seq[io.apibuilder.api.v0.models.Subscription]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2643,11 +2686,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2656,13 +2700,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions")
 
         val (payload, formPayload) = (Some(subscriptionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -2671,11 +2716,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2688,7 +2734,8 @@ def closeAsyncHttpClient(): Unit = {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Token]] = {
         val urlPath = Seq("tokens", "users", userGuid.toString)
 
@@ -2698,7 +2745,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Token]]("Seq[io.apibuilder.api.v0.models.Token]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2706,11 +2753,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.CleartextToken] = {
         val urlPath = Seq("tokens", guid.toString, "cleartext")
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.CleartextToken]("io.apibuilder.api.v0.models.CleartextToken", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2719,13 +2767,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Token] = {
         val urlPath = Seq("tokens")
 
         val (payload, formPayload) = (Some(tokenForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Token]("io.apibuilder.api.v0.models.Token", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -2734,11 +2783,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("tokens", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2750,7 +2800,8 @@ def closeAsyncHttpClient(): Unit = {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.User]] = {
         val urlPath = Seq("users")
 
@@ -2760,7 +2811,7 @@ def closeAsyncHttpClient(): Unit = {
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.User]]("Seq[io.apibuilder.api.v0.models.User]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2768,11 +2819,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2782,7 +2834,8 @@ def closeAsyncHttpClient(): Unit = {
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", "authenticate")
 
@@ -2792,7 +2845,7 @@ def closeAsyncHttpClient(): Unit = {
           "password" -> password
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2801,13 +2854,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users")
 
         val (payload, formPayload) = (Some(userForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2817,13 +2871,14 @@ def closeAsyncHttpClient(): Unit = {
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
         val (payload, formPayload) = (Some(userUpdateForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2834,13 +2889,14 @@ def closeAsyncHttpClient(): Unit = {
     object Validations extends Validations {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Validation] = {
         val urlPath = Seq("validations")
 
         val (payload, formPayload) = (Some(value), None)
 
-        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Validation]("io.apibuilder.api.v0.models.Validation", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2853,7 +2909,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Version]] = {
         val urlPath = Seq(orgKey, applicationKey)
 
@@ -2862,7 +2919,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Version]]("Seq[io.apibuilder.api.v0.models.Version]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2872,11 +2929,12 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2887,13 +2945,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2905,13 +2964,14 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2922,11 +2982,12 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2941,7 +3002,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val urlPath = Seq("watches")
 
@@ -2954,7 +3016,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Watch]]("Seq[io.apibuilder.api.v0.models.Watch]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2962,11 +3024,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2977,7 +3040,8 @@ def closeAsyncHttpClient(): Unit = {
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Boolean] = {
         val urlPath = Seq("watches", "check")
 
@@ -2987,7 +3051,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Boolean]("Boolean", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2995,13 +3059,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches")
 
         val (payload, formPayload) = (Some(watchForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -3010,11 +3075,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -3039,7 +3105,8 @@ def closeAsyncHttpClient(): Unit = {
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     )(handler: org.http4s.Response => scalaz.concurrent.Task[U]
     )(implicit encoder: io.circe.Encoder[T]): scalaz.concurrent.Task[U] = {
       import org.http4s.QueryParamEncoder._
@@ -3058,9 +3125,7 @@ def closeAsyncHttpClient(): Unit = {
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request(method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request(method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -3071,9 +3136,10 @@ def closeAsyncHttpClient(): Unit = {
         case a => sys.error("Invalid authorization scheme[" + a.getClass + "]")
       }
 
+      val decoratedRequest = requestModifier(reqAndMaybeAuth)
       val reqAndMaybeAuthAndBody =
-        if (formBody.nonEmpty) formBody.fold(scalaz.concurrent.Task.now(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
-        else body.fold(scalaz.concurrent.Task.now(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
+        if (formBody.nonEmpty) formBody.fold(scalaz.concurrent.Task.now(decoratedRequest))(decoratedRequest.withBody)
+        else body.fold(scalaz.concurrent.Task.now(decoratedRequest))(decoratedRequest.withBody)
 
       asyncHttpClient.fetch(modifyRequest(reqAndMaybeAuthAndBody))(handler)
     }
@@ -3151,7 +3217,8 @@ def closeAsyncHttpClient(): Unit = {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -3160,7 +3227,8 @@ def closeAsyncHttpClient(): Unit = {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3170,7 +3238,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3179,7 +3248,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
 
     /**
@@ -3189,7 +3259,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application]
   }
 
@@ -3207,7 +3278,8 @@ def closeAsyncHttpClient(): Unit = {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -3215,7 +3287,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3223,7 +3296,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3232,7 +3306,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3248,7 +3323,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -3266,7 +3342,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Code]
   }
 
@@ -3277,7 +3354,8 @@ def closeAsyncHttpClient(): Unit = {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -3286,7 +3364,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3296,7 +3375,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3313,17 +3393,20 @@ def closeAsyncHttpClient(): Unit = {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -3331,7 +3414,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3355,22 +3439,26 @@ def closeAsyncHttpClient(): Unit = {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Map[String, String]]
   }
 
@@ -3384,12 +3472,14 @@ def closeAsyncHttpClient(): Unit = {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Item]
   }
 
@@ -3407,7 +3497,8 @@ def closeAsyncHttpClient(): Unit = {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -3417,7 +3508,8 @@ def closeAsyncHttpClient(): Unit = {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -3426,7 +3518,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
 
     /**
@@ -3435,7 +3528,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3453,17 +3547,20 @@ def closeAsyncHttpClient(): Unit = {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3489,7 +3586,8 @@ def closeAsyncHttpClient(): Unit = {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -3497,7 +3595,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3505,7 +3604,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3514,7 +3614,8 @@ def closeAsyncHttpClient(): Unit = {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3522,7 +3623,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
 
     /**
@@ -3538,7 +3640,8 @@ def closeAsyncHttpClient(): Unit = {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -3547,7 +3650,8 @@ def closeAsyncHttpClient(): Unit = {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3557,7 +3661,8 @@ def closeAsyncHttpClient(): Unit = {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3567,7 +3672,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3578,7 +3684,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3590,7 +3697,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -3612,7 +3720,8 @@ def closeAsyncHttpClient(): Unit = {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -3620,7 +3729,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -3628,12 +3738,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3647,7 +3759,8 @@ def closeAsyncHttpClient(): Unit = {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -3655,7 +3768,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -3663,12 +3777,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3685,7 +3801,8 @@ def closeAsyncHttpClient(): Unit = {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -3693,7 +3810,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3704,7 +3822,8 @@ def closeAsyncHttpClient(): Unit = {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3712,7 +3831,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3721,14 +3841,16 @@ def closeAsyncHttpClient(): Unit = {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -3746,7 +3868,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -3759,7 +3882,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3769,7 +3893,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3780,7 +3905,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3790,7 +3916,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -3812,7 +3939,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -3820,7 +3948,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -3833,7 +3962,8 @@ def closeAsyncHttpClient(): Unit = {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Boolean]
 
     /**
@@ -3841,12 +3971,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
diff --git a/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0ClientOnly.scala.txt b/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0ClientOnly.scala.txt
index f9739b039..f9e98fc22 100644
--- a/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0ClientOnly.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0ClientOnly.scala.txt
@@ -83,7 +83,8 @@ def closeAsyncHttpClient(): Unit = {
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Application]] = {
         val urlPath = Seq(orgKey)
 
@@ -96,7 +97,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Application]]("Seq[io.apibuilder.api.v0.models.Application]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -105,13 +106,14 @@ def closeAsyncHttpClient(): Unit = {
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -122,13 +124,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -138,11 +141,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq(orgKey, applicationKey)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -152,13 +156,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey, "move")
 
         val (payload, formPayload) = (Some(moveForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -172,7 +177,8 @@ def closeAsyncHttpClient(): Unit = {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val urlPath = Seq("attributes")
 
@@ -183,7 +189,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Attribute]]("Seq[io.apibuilder.api.v0.models.Attribute]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -191,11 +197,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -204,13 +211,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes")
 
         val (payload, formPayload) = (Some(attributeForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 401 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
@@ -220,11 +228,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 401 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -239,7 +248,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Change]] = {
         val urlPath = Seq("changes")
 
@@ -250,7 +260,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Change]]("Seq[io.apibuilder.api.v0.models.Change]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -263,11 +273,12 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Code] = {
         val urlPath = Seq(orgKey, applicationKey, version, generatorKey)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Code]("io.apibuilder.api.v0.models.Code", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
@@ -280,13 +291,14 @@ def closeAsyncHttpClient(): Unit = {
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Domain] = {
         val urlPath = Seq("domains", orgKey)
 
         val (payload, formPayload) = (Some(domain), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Domain]("io.apibuilder.api.v0.models.Domain", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -296,11 +308,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("domains", orgKey, name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -310,13 +323,14 @@ def closeAsyncHttpClient(): Unit = {
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("email_verification_confirmations")
 
         val (payload, formPayload) = (Some(emailVerificationConfirmationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -331,7 +345,8 @@ def closeAsyncHttpClient(): Unit = {
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val urlPath = Seq("generator_services")
 
@@ -343,7 +358,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.GeneratorService]]("Seq[io.apibuilder.api.v0.models.GeneratorService]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -351,11 +366,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -364,13 +380,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services")
 
         val (payload, formPayload) = (Some(generatorServiceForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -379,11 +396,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 403 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -401,7 +419,8 @@ def closeAsyncHttpClient(): Unit = {
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val urlPath = Seq("generators")
 
@@ -415,7 +434,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -423,11 +442,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorWithService] = {
         val urlPath = Seq("generators", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorWithService]("io.apibuilder.api.v0.models.GeneratorWithService", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -437,22 +457,24 @@ def closeAsyncHttpClient(): Unit = {
 
     object Healthchecks extends Healthchecks {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.generator.v0.models.Healthcheck] = {
         val urlPath = Seq("_internal_", "healthcheck")
 
-        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.generator.v0.models.Healthcheck]("io.apibuilder.generator.v0.models.Healthcheck", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Map[String, String]] = {
         val urlPath = Seq("_internal_", "migrate")
 
-        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Map[String, String]]("Map[String, String]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -464,7 +486,8 @@ def closeAsyncHttpClient(): Unit = {
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Item]] = {
         val urlPath = Seq("items")
 
@@ -474,7 +497,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Item]]("Seq[io.apibuilder.api.v0.models.Item]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -482,11 +505,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Item] = {
         val urlPath = Seq("items", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Item]("io.apibuilder.api.v0.models.Item", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -502,7 +526,8 @@ def closeAsyncHttpClient(): Unit = {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val urlPath = Seq("membership_requests")
 
@@ -515,7 +540,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.MembershipRequest]]("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -525,7 +550,8 @@ def closeAsyncHttpClient(): Unit = {
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.MembershipRequest] = {
         val urlPath = Seq("membership_requests")
 
@@ -536,7 +562,7 @@ def closeAsyncHttpClient(): Unit = {
           "role" -> role
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.MembershipRequest]("io.apibuilder.api.v0.models.MembershipRequest", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -545,11 +571,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "accept")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -558,11 +585,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "decline")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -578,7 +606,8 @@ def closeAsyncHttpClient(): Unit = {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val urlPath = Seq("memberships")
 
@@ -591,7 +620,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Membership]]("Seq[io.apibuilder.api.v0.models.Membership]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -599,11 +628,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Membership] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Membership]("io.apibuilder.api.v0.models.Membership", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -612,11 +642,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -632,7 +663,8 @@ def closeAsyncHttpClient(): Unit = {
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val urlPath = Seq("organizations")
 
@@ -646,7 +678,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Organization]]("Seq[io.apibuilder.api.v0.models.Organization]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -654,11 +686,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -667,13 +700,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations")
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -683,13 +717,14 @@ def closeAsyncHttpClient(): Unit = {
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -698,11 +733,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -713,7 +749,8 @@ def closeAsyncHttpClient(): Unit = {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val urlPath = Seq("organizations", key, "attributes")
 
@@ -723,7 +760,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.AttributeValue]]("Seq[io.apibuilder.api.v0.models.AttributeValue]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -732,11 +769,12 @@ def closeAsyncHttpClient(): Unit = {
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -747,13 +785,14 @@ def closeAsyncHttpClient(): Unit = {
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
         val (payload, formPayload) = (Some(attributeValueForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -765,11 +804,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 401 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -781,13 +821,14 @@ def closeAsyncHttpClient(): Unit = {
     object PasswordResetRequests extends PasswordResetRequests {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("password_reset_requests")
 
         val (payload, formPayload) = (Some(passwordResetRequest), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -798,13 +839,14 @@ def closeAsyncHttpClient(): Unit = {
     object PasswordResets extends PasswordResets {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val urlPath = Seq("password_resets")
 
         val (payload, formPayload) = (Some(passwordReset), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.PasswordResetSuccess]("io.apibuilder.api.v0.models.PasswordResetSuccess", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -820,7 +862,8 @@ def closeAsyncHttpClient(): Unit = {
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val urlPath = Seq("subscriptions")
 
@@ -833,7 +876,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Subscription]]("Seq[io.apibuilder.api.v0.models.Subscription]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -841,11 +884,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -854,13 +898,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions")
 
         val (payload, formPayload) = (Some(subscriptionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -869,11 +914,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -886,7 +932,8 @@ def closeAsyncHttpClient(): Unit = {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Token]] = {
         val urlPath = Seq("tokens", "users", userGuid.toString)
 
@@ -896,7 +943,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Token]]("Seq[io.apibuilder.api.v0.models.Token]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -904,11 +951,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.CleartextToken] = {
         val urlPath = Seq("tokens", guid.toString, "cleartext")
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.CleartextToken]("io.apibuilder.api.v0.models.CleartextToken", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -917,13 +965,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Token] = {
         val urlPath = Seq("tokens")
 
         val (payload, formPayload) = (Some(tokenForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Token]("io.apibuilder.api.v0.models.Token", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -932,11 +981,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("tokens", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -948,7 +998,8 @@ def closeAsyncHttpClient(): Unit = {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.User]] = {
         val urlPath = Seq("users")
 
@@ -958,7 +1009,7 @@ def closeAsyncHttpClient(): Unit = {
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.User]]("Seq[io.apibuilder.api.v0.models.User]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -966,11 +1017,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -980,7 +1032,8 @@ def closeAsyncHttpClient(): Unit = {
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", "authenticate")
 
@@ -990,7 +1043,7 @@ def closeAsyncHttpClient(): Unit = {
           "password" -> password
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -999,13 +1052,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users")
 
         val (payload, formPayload) = (Some(userForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1015,13 +1069,14 @@ def closeAsyncHttpClient(): Unit = {
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
         val (payload, formPayload) = (Some(userUpdateForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1032,13 +1087,14 @@ def closeAsyncHttpClient(): Unit = {
     object Validations extends Validations {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Validation] = {
         val urlPath = Seq("validations")
 
         val (payload, formPayload) = (Some(value), None)
 
-        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Validation]("io.apibuilder.api.v0.models.Validation", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1051,7 +1107,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Version]] = {
         val urlPath = Seq(orgKey, applicationKey)
 
@@ -1060,7 +1117,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Version]]("Seq[io.apibuilder.api.v0.models.Version]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1070,11 +1127,12 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -1085,13 +1143,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1103,13 +1162,14 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1120,11 +1180,12 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1139,7 +1200,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val urlPath = Seq("watches")
 
@@ -1152,7 +1214,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Watch]]("Seq[io.apibuilder.api.v0.models.Watch]", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1160,11 +1222,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 404 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -1175,7 +1238,8 @@ def closeAsyncHttpClient(): Unit = {
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Boolean] = {
         val urlPath = Seq("watches", "check")
 
@@ -1185,7 +1249,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Boolean]("Boolean", r)
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1193,13 +1257,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches")
 
         val (payload, formPayload) = (Some(watchForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 409 => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -1208,11 +1273,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): scalaz.concurrent.Task[Unit] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => scalaz.concurrent.Task.now(())
           case r => scalaz.concurrent.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1237,7 +1303,8 @@ def closeAsyncHttpClient(): Unit = {
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     )(handler: org.http4s.Response => scalaz.concurrent.Task[U]
     )(implicit encoder: io.circe.Encoder[T]): scalaz.concurrent.Task[U] = {
       import org.http4s.QueryParamEncoder._
@@ -1256,9 +1323,7 @@ def closeAsyncHttpClient(): Unit = {
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request(method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request(method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -1269,9 +1334,10 @@ def closeAsyncHttpClient(): Unit = {
         case a => sys.error("Invalid authorization scheme[" + a.getClass + "]")
       }
 
+      val decoratedRequest = requestModifier(reqAndMaybeAuth)
       val reqAndMaybeAuthAndBody =
-        if (formBody.nonEmpty) formBody.fold(scalaz.concurrent.Task.now(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
-        else body.fold(scalaz.concurrent.Task.now(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
+        if (formBody.nonEmpty) formBody.fold(scalaz.concurrent.Task.now(decoratedRequest))(decoratedRequest.withBody)
+        else body.fold(scalaz.concurrent.Task.now(decoratedRequest))(decoratedRequest.withBody)
 
       asyncHttpClient.fetch(modifyRequest(reqAndMaybeAuthAndBody))(handler)
     }
@@ -1349,7 +1415,8 @@ def closeAsyncHttpClient(): Unit = {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -1358,7 +1425,8 @@ def closeAsyncHttpClient(): Unit = {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -1368,7 +1436,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -1377,7 +1446,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
 
     /**
@@ -1387,7 +1457,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application]
   }
 
@@ -1405,7 +1476,8 @@ def closeAsyncHttpClient(): Unit = {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -1413,7 +1485,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -1421,7 +1494,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -1430,7 +1504,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1446,7 +1521,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -1464,7 +1540,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Code]
   }
 
@@ -1475,7 +1552,8 @@ def closeAsyncHttpClient(): Unit = {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -1484,7 +1562,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1494,7 +1573,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1511,17 +1591,20 @@ def closeAsyncHttpClient(): Unit = {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -1529,7 +1612,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1553,22 +1637,26 @@ def closeAsyncHttpClient(): Unit = {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Map[String, String]]
   }
 
@@ -1582,12 +1670,14 @@ def closeAsyncHttpClient(): Unit = {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Item]
   }
 
@@ -1605,7 +1695,8 @@ def closeAsyncHttpClient(): Unit = {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -1615,7 +1706,8 @@ def closeAsyncHttpClient(): Unit = {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -1624,7 +1716,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
 
     /**
@@ -1633,7 +1726,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1651,17 +1745,20 @@ def closeAsyncHttpClient(): Unit = {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1687,7 +1784,8 @@ def closeAsyncHttpClient(): Unit = {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -1695,7 +1793,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1703,7 +1802,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1712,7 +1812,8 @@ def closeAsyncHttpClient(): Unit = {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1720,7 +1821,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
 
     /**
@@ -1736,7 +1838,8 @@ def closeAsyncHttpClient(): Unit = {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -1745,7 +1848,8 @@ def closeAsyncHttpClient(): Unit = {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -1755,7 +1859,8 @@ def closeAsyncHttpClient(): Unit = {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -1765,7 +1870,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1776,7 +1882,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1788,7 +1895,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -1810,7 +1918,8 @@ def closeAsyncHttpClient(): Unit = {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -1818,7 +1927,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -1826,12 +1936,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1845,7 +1957,8 @@ def closeAsyncHttpClient(): Unit = {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -1853,7 +1966,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -1861,12 +1975,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -1883,7 +1999,8 @@ def closeAsyncHttpClient(): Unit = {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -1891,7 +2008,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1902,7 +2020,8 @@ def closeAsyncHttpClient(): Unit = {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1910,7 +2029,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1919,14 +2039,16 @@ def closeAsyncHttpClient(): Unit = {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -1944,7 +2066,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -1957,7 +2080,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1967,7 +2091,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1978,7 +2103,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1988,7 +2114,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
@@ -2010,7 +2137,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -2018,7 +2146,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -2031,7 +2160,8 @@ def closeAsyncHttpClient(): Unit = {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Boolean]
 
     /**
@@ -2039,12 +2169,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit]
   }
 
diff --git a/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0MockClient.scala.txt b/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0MockClient.scala.txt
index 7a05c70a8..b707b324e 100644
--- a/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0MockClient.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/015/BryzekApidocApiV0MockClient.scala.txt
@@ -56,7 +56,8 @@ package io.apibuilder.api.v0.mock {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Application]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -67,7 +68,8 @@ package io.apibuilder.api.v0.mock {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -79,7 +81,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -90,7 +93,8 @@ package io.apibuilder.api.v0.mock {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -102,7 +106,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Application] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -126,7 +131,8 @@ package io.apibuilder.api.v0.mock {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Attribute]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -136,7 +142,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeAttribute()
     }
@@ -146,7 +153,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Attribute] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeAttribute()
     }
@@ -157,7 +165,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -179,7 +188,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Change]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -203,7 +213,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Code] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeCode()
     }
@@ -215,13 +226,15 @@ package io.apibuilder.api.v0.mock {
   trait MockHealthchecks extends io.apibuilder.api.v0.Healthchecks {
 
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.generator.v0.models.Healthcheck] = scalaz.concurrent.Task.now {
       io.apibuilder.generator.v0.mock.Factories.makeHealthcheck()
     }
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Map[String, String]] = scalaz.concurrent.Task.now {
       Map()
     }
@@ -238,7 +251,8 @@ package io.apibuilder.api.v0.mock {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Domain] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeDomain()
     }
@@ -249,7 +263,8 @@ package io.apibuilder.api.v0.mock {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -265,7 +280,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -288,21 +304,24 @@ package io.apibuilder.api.v0.mock {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]] = scalaz.concurrent.Task.now {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorService()
     }
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorService] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorService()
     }
@@ -312,7 +331,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -342,14 +362,16 @@ package io.apibuilder.api.v0.mock {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = scalaz.concurrent.Task.now {
       Nil
     }
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.GeneratorWithService] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorWithService()
     }
@@ -369,14 +391,16 @@ package io.apibuilder.api.v0.mock {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Item]] = scalaz.concurrent.Task.now {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Item] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeItem()
     }
@@ -400,21 +424,24 @@ package io.apibuilder.api.v0.mock {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Membership]] = scalaz.concurrent.Task.now {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Membership] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeMembership()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -438,7 +465,8 @@ package io.apibuilder.api.v0.mock {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -450,7 +478,8 @@ package io.apibuilder.api.v0.mock {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.MembershipRequest] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeMembershipRequest()
     }
@@ -461,7 +490,8 @@ package io.apibuilder.api.v0.mock {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -472,7 +502,8 @@ package io.apibuilder.api.v0.mock {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -504,7 +535,8 @@ package io.apibuilder.api.v0.mock {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Organization]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -514,7 +546,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -524,7 +557,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -535,7 +569,8 @@ package io.apibuilder.api.v0.mock {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Organization] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -545,7 +580,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -563,7 +599,8 @@ package io.apibuilder.api.v0.mock {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -574,7 +611,8 @@ package io.apibuilder.api.v0.mock {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeAttributeValue()
     }
@@ -586,7 +624,8 @@ package io.apibuilder.api.v0.mock {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.AttributeValue] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeAttributeValue()
     }
@@ -598,7 +637,8 @@ package io.apibuilder.api.v0.mock {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -616,7 +656,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.PasswordResetSuccess] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makePasswordResetSuccess()
     }
@@ -633,7 +674,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -661,7 +703,8 @@ package io.apibuilder.api.v0.mock {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Subscription]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -671,7 +714,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeSubscription()
     }
@@ -681,14 +725,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Subscription] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeSubscription()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -708,7 +754,8 @@ package io.apibuilder.api.v0.mock {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Token]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -718,7 +765,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.CleartextToken] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeCleartextToken()
     }
@@ -728,14 +776,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Token] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeToken()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -758,7 +808,8 @@ package io.apibuilder.api.v0.mock {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.User]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -768,7 +819,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -781,7 +833,8 @@ package io.apibuilder.api.v0.mock {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -791,7 +844,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -802,7 +856,8 @@ package io.apibuilder.api.v0.mock {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.User] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -815,7 +870,8 @@ package io.apibuilder.api.v0.mock {
 
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Validation] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeValidation()
     }
@@ -839,7 +895,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Version]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -854,7 +911,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -866,7 +924,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -879,7 +938,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Version] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -891,7 +951,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
@@ -919,7 +980,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Seq[io.apibuilder.api.v0.models.Watch]] = scalaz.concurrent.Task.now {
       Nil
     }
@@ -929,7 +991,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeWatch()
     }
@@ -944,7 +1007,8 @@ package io.apibuilder.api.v0.mock {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Boolean] = scalaz.concurrent.Task.now {
       true
     }
@@ -954,14 +1018,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[io.apibuilder.api.v0.models.Watch] = scalaz.concurrent.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeWatch()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): scalaz.concurrent.Task[Unit] = scalaz.concurrent.Task.now {
       // unit type
     }
diff --git a/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0Client.scala.txt b/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0Client.scala.txt
index f76383fde..68cd8fb4c 100644
--- a/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0Client.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0Client.scala.txt
@@ -1885,7 +1885,8 @@ def closeAsyncHttpClient(): Unit = {
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Application]] = {
         val urlPath = Seq(orgKey)
 
@@ -1898,7 +1899,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Application]]("Seq[io.apibuilder.api.v0.models.Application]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1907,13 +1908,14 @@ def closeAsyncHttpClient(): Unit = {
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1924,13 +1926,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1940,11 +1943,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq(orgKey, applicationKey)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1954,13 +1958,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey, "move")
 
         val (payload, formPayload) = (Some(moveForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1974,7 +1979,8 @@ def closeAsyncHttpClient(): Unit = {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val urlPath = Seq("attributes")
 
@@ -1985,7 +1991,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Attribute]]("Seq[io.apibuilder.api.v0.models.Attribute]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1993,11 +1999,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2006,13 +2013,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes")
 
         val (payload, formPayload) = (Some(attributeForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 401 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
@@ -2022,11 +2030,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 401 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2041,7 +2050,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Change]] = {
         val urlPath = Seq("changes")
 
@@ -2052,7 +2062,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Change]]("Seq[io.apibuilder.api.v0.models.Change]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2065,11 +2075,12 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Code] = {
         val urlPath = Seq(orgKey, applicationKey, version, generatorKey)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Code]("io.apibuilder.api.v0.models.Code", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
@@ -2082,13 +2093,14 @@ def closeAsyncHttpClient(): Unit = {
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Domain] = {
         val urlPath = Seq("domains", orgKey)
 
         val (payload, formPayload) = (Some(domain), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Domain]("io.apibuilder.api.v0.models.Domain", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2098,11 +2110,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("domains", orgKey, name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2112,13 +2125,14 @@ def closeAsyncHttpClient(): Unit = {
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("email_verification_confirmations")
 
         val (payload, formPayload) = (Some(emailVerificationConfirmationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2133,7 +2147,8 @@ def closeAsyncHttpClient(): Unit = {
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val urlPath = Seq("generator_services")
 
@@ -2145,7 +2160,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.GeneratorService]]("Seq[io.apibuilder.api.v0.models.GeneratorService]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2153,11 +2168,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2166,13 +2182,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services")
 
         val (payload, formPayload) = (Some(generatorServiceForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2181,11 +2198,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 403 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2203,7 +2221,8 @@ def closeAsyncHttpClient(): Unit = {
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val urlPath = Seq("generators")
 
@@ -2217,7 +2236,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2225,11 +2244,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.GeneratorWithService] = {
         val urlPath = Seq("generators", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorWithService]("io.apibuilder.api.v0.models.GeneratorWithService", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2239,22 +2259,24 @@ def closeAsyncHttpClient(): Unit = {
 
     object Healthchecks extends Healthchecks {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.generator.v0.models.Healthcheck] = {
         val urlPath = Seq("_internal_", "healthcheck")
 
-        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.generator.v0.models.Healthcheck]("io.apibuilder.generator.v0.models.Healthcheck", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Map[String, String]] = {
         val urlPath = Seq("_internal_", "migrate")
 
-        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Map[String, String]]("Map[String, String]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2266,7 +2288,8 @@ def closeAsyncHttpClient(): Unit = {
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Item]] = {
         val urlPath = Seq("items")
 
@@ -2276,7 +2299,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Item]]("Seq[io.apibuilder.api.v0.models.Item]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2284,11 +2307,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Item] = {
         val urlPath = Seq("items", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Item]("io.apibuilder.api.v0.models.Item", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2304,7 +2328,8 @@ def closeAsyncHttpClient(): Unit = {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val urlPath = Seq("membership_requests")
 
@@ -2317,7 +2342,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.MembershipRequest]]("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2327,7 +2352,8 @@ def closeAsyncHttpClient(): Unit = {
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.MembershipRequest] = {
         val urlPath = Seq("membership_requests")
 
@@ -2338,7 +2364,7 @@ def closeAsyncHttpClient(): Unit = {
           "role" -> role
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.MembershipRequest]("io.apibuilder.api.v0.models.MembershipRequest", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2347,11 +2373,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "accept")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2360,11 +2387,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "decline")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2380,7 +2408,8 @@ def closeAsyncHttpClient(): Unit = {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val urlPath = Seq("memberships")
 
@@ -2393,7 +2422,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Membership]]("Seq[io.apibuilder.api.v0.models.Membership]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2401,11 +2430,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Membership] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Membership]("io.apibuilder.api.v0.models.Membership", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2414,11 +2444,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2434,7 +2465,8 @@ def closeAsyncHttpClient(): Unit = {
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val urlPath = Seq("organizations")
 
@@ -2448,7 +2480,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Organization]]("Seq[io.apibuilder.api.v0.models.Organization]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2456,11 +2488,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2469,13 +2502,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations")
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2485,13 +2519,14 @@ def closeAsyncHttpClient(): Unit = {
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2500,11 +2535,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2515,7 +2551,8 @@ def closeAsyncHttpClient(): Unit = {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val urlPath = Seq("organizations", key, "attributes")
 
@@ -2525,7 +2562,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.AttributeValue]]("Seq[io.apibuilder.api.v0.models.AttributeValue]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2534,11 +2571,12 @@ def closeAsyncHttpClient(): Unit = {
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2549,13 +2587,14 @@ def closeAsyncHttpClient(): Unit = {
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
         val (payload, formPayload) = (Some(attributeValueForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2567,11 +2606,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 401 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2583,13 +2623,14 @@ def closeAsyncHttpClient(): Unit = {
     object PasswordResetRequests extends PasswordResetRequests {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("password_reset_requests")
 
         val (payload, formPayload) = (Some(passwordResetRequest), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2600,13 +2641,14 @@ def closeAsyncHttpClient(): Unit = {
     object PasswordResets extends PasswordResets {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val urlPath = Seq("password_resets")
 
         val (payload, formPayload) = (Some(passwordReset), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.PasswordResetSuccess]("io.apibuilder.api.v0.models.PasswordResetSuccess", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2622,7 +2664,8 @@ def closeAsyncHttpClient(): Unit = {
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val urlPath = Seq("subscriptions")
 
@@ -2635,7 +2678,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Subscription]]("Seq[io.apibuilder.api.v0.models.Subscription]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2643,11 +2686,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2656,13 +2700,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions")
 
         val (payload, formPayload) = (Some(subscriptionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -2671,11 +2716,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2688,7 +2734,8 @@ def closeAsyncHttpClient(): Unit = {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Token]] = {
         val urlPath = Seq("tokens", "users", userGuid.toString)
 
@@ -2698,7 +2745,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Token]]("Seq[io.apibuilder.api.v0.models.Token]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2706,11 +2753,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.CleartextToken] = {
         val urlPath = Seq("tokens", guid.toString, "cleartext")
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.CleartextToken]("io.apibuilder.api.v0.models.CleartextToken", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2719,13 +2767,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Token] = {
         val urlPath = Seq("tokens")
 
         val (payload, formPayload) = (Some(tokenForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Token]("io.apibuilder.api.v0.models.Token", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -2734,11 +2783,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("tokens", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2750,7 +2800,8 @@ def closeAsyncHttpClient(): Unit = {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.User]] = {
         val urlPath = Seq("users")
 
@@ -2760,7 +2811,7 @@ def closeAsyncHttpClient(): Unit = {
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.User]]("Seq[io.apibuilder.api.v0.models.User]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2768,11 +2819,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2782,7 +2834,8 @@ def closeAsyncHttpClient(): Unit = {
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", "authenticate")
 
@@ -2792,7 +2845,7 @@ def closeAsyncHttpClient(): Unit = {
           "password" -> password
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2801,13 +2854,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users")
 
         val (payload, formPayload) = (Some(userForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2817,13 +2871,14 @@ def closeAsyncHttpClient(): Unit = {
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
         val (payload, formPayload) = (Some(userUpdateForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2834,13 +2889,14 @@ def closeAsyncHttpClient(): Unit = {
     object Validations extends Validations {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Validation] = {
         val urlPath = Seq("validations")
 
         val (payload, formPayload) = (Some(value), None)
 
-        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Validation]("io.apibuilder.api.v0.models.Validation", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2853,7 +2909,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Version]] = {
         val urlPath = Seq(orgKey, applicationKey)
 
@@ -2862,7 +2919,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Version]]("Seq[io.apibuilder.api.v0.models.Version]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2872,11 +2929,12 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2887,13 +2945,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2905,13 +2964,14 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2922,11 +2982,12 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2941,7 +3002,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val urlPath = Seq("watches")
 
@@ -2954,7 +3016,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Watch]]("Seq[io.apibuilder.api.v0.models.Watch]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2962,11 +3024,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2977,7 +3040,8 @@ def closeAsyncHttpClient(): Unit = {
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Boolean] = {
         val urlPath = Seq("watches", "check")
 
@@ -2987,7 +3051,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Boolean]("Boolean", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2995,13 +3059,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches")
 
         val (payload, formPayload) = (Some(watchForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -3010,11 +3075,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -3039,7 +3105,8 @@ def closeAsyncHttpClient(): Unit = {
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     )(handler: org.http4s.Response => fs2.Task[U]
     )(implicit encoder: io.circe.Encoder[T]): fs2.Task[U] = {
       import org.http4s.QueryParamEncoder._
@@ -3058,9 +3125,7 @@ def closeAsyncHttpClient(): Unit = {
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request(method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request(method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -3071,9 +3136,10 @@ def closeAsyncHttpClient(): Unit = {
         case a => sys.error("Invalid authorization scheme[" + a.getClass + "]")
       }
 
+      val decoratedRequest = requestModifier(reqAndMaybeAuth)
       val reqAndMaybeAuthAndBody =
-        if (formBody.nonEmpty) formBody.fold(fs2.Task.now(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
-        else body.fold(fs2.Task.now(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
+        if (formBody.nonEmpty) formBody.fold(fs2.Task.now(decoratedRequest))(decoratedRequest.withBody)
+        else body.fold(fs2.Task.now(decoratedRequest))(decoratedRequest.withBody)
 
       asyncHttpClient.fetch(modifyRequest(reqAndMaybeAuthAndBody))(handler)
     }
@@ -3151,7 +3217,8 @@ def closeAsyncHttpClient(): Unit = {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -3160,7 +3227,8 @@ def closeAsyncHttpClient(): Unit = {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3170,7 +3238,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3179,7 +3248,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
 
     /**
@@ -3189,7 +3259,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application]
   }
 
@@ -3207,7 +3278,8 @@ def closeAsyncHttpClient(): Unit = {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -3215,7 +3287,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3223,7 +3296,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3232,7 +3306,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3248,7 +3323,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -3266,7 +3342,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Code]
   }
 
@@ -3277,7 +3354,8 @@ def closeAsyncHttpClient(): Unit = {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -3286,7 +3364,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3296,7 +3375,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3313,17 +3393,20 @@ def closeAsyncHttpClient(): Unit = {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -3331,7 +3414,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3355,22 +3439,26 @@ def closeAsyncHttpClient(): Unit = {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Map[String, String]]
   }
 
@@ -3384,12 +3472,14 @@ def closeAsyncHttpClient(): Unit = {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Item]
   }
 
@@ -3407,7 +3497,8 @@ def closeAsyncHttpClient(): Unit = {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -3417,7 +3508,8 @@ def closeAsyncHttpClient(): Unit = {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -3426,7 +3518,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
 
     /**
@@ -3435,7 +3528,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3453,17 +3547,20 @@ def closeAsyncHttpClient(): Unit = {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3489,7 +3586,8 @@ def closeAsyncHttpClient(): Unit = {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -3497,7 +3595,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3505,7 +3604,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3514,7 +3614,8 @@ def closeAsyncHttpClient(): Unit = {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3522,7 +3623,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
 
     /**
@@ -3538,7 +3640,8 @@ def closeAsyncHttpClient(): Unit = {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -3547,7 +3650,8 @@ def closeAsyncHttpClient(): Unit = {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3557,7 +3661,8 @@ def closeAsyncHttpClient(): Unit = {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3567,7 +3672,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3578,7 +3684,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3590,7 +3697,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -3612,7 +3720,8 @@ def closeAsyncHttpClient(): Unit = {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -3620,7 +3729,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -3628,12 +3738,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3647,7 +3759,8 @@ def closeAsyncHttpClient(): Unit = {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -3655,7 +3768,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -3663,12 +3777,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3685,7 +3801,8 @@ def closeAsyncHttpClient(): Unit = {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -3693,7 +3810,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3704,7 +3822,8 @@ def closeAsyncHttpClient(): Unit = {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3712,7 +3831,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3721,14 +3841,16 @@ def closeAsyncHttpClient(): Unit = {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -3746,7 +3868,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -3759,7 +3882,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3769,7 +3893,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3780,7 +3905,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3790,7 +3916,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -3812,7 +3939,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -3820,7 +3948,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -3833,7 +3962,8 @@ def closeAsyncHttpClient(): Unit = {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Boolean]
 
     /**
@@ -3841,12 +3971,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
diff --git a/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0ClientOnly.scala.txt b/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0ClientOnly.scala.txt
index d1869d483..2a8b13a4a 100644
--- a/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0ClientOnly.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0ClientOnly.scala.txt
@@ -83,7 +83,8 @@ def closeAsyncHttpClient(): Unit = {
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Application]] = {
         val urlPath = Seq(orgKey)
 
@@ -96,7 +97,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Application]]("Seq[io.apibuilder.api.v0.models.Application]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -105,13 +106,14 @@ def closeAsyncHttpClient(): Unit = {
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -122,13 +124,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -138,11 +141,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq(orgKey, applicationKey)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -152,13 +156,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey, "move")
 
         val (payload, formPayload) = (Some(moveForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -172,7 +177,8 @@ def closeAsyncHttpClient(): Unit = {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val urlPath = Seq("attributes")
 
@@ -183,7 +189,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Attribute]]("Seq[io.apibuilder.api.v0.models.Attribute]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -191,11 +197,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -204,13 +211,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes")
 
         val (payload, formPayload) = (Some(attributeForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 401 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
@@ -220,11 +228,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 401 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -239,7 +248,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Change]] = {
         val urlPath = Seq("changes")
 
@@ -250,7 +260,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Change]]("Seq[io.apibuilder.api.v0.models.Change]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -263,11 +273,12 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Code] = {
         val urlPath = Seq(orgKey, applicationKey, version, generatorKey)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Code]("io.apibuilder.api.v0.models.Code", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
@@ -280,13 +291,14 @@ def closeAsyncHttpClient(): Unit = {
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Domain] = {
         val urlPath = Seq("domains", orgKey)
 
         val (payload, formPayload) = (Some(domain), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Domain]("io.apibuilder.api.v0.models.Domain", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -296,11 +308,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("domains", orgKey, name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -310,13 +323,14 @@ def closeAsyncHttpClient(): Unit = {
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("email_verification_confirmations")
 
         val (payload, formPayload) = (Some(emailVerificationConfirmationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -331,7 +345,8 @@ def closeAsyncHttpClient(): Unit = {
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val urlPath = Seq("generator_services")
 
@@ -343,7 +358,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.GeneratorService]]("Seq[io.apibuilder.api.v0.models.GeneratorService]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -351,11 +366,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -364,13 +380,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services")
 
         val (payload, formPayload) = (Some(generatorServiceForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -379,11 +396,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 403 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -401,7 +419,8 @@ def closeAsyncHttpClient(): Unit = {
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val urlPath = Seq("generators")
 
@@ -415,7 +434,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -423,11 +442,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.GeneratorWithService] = {
         val urlPath = Seq("generators", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.GeneratorWithService]("io.apibuilder.api.v0.models.GeneratorWithService", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -437,22 +457,24 @@ def closeAsyncHttpClient(): Unit = {
 
     object Healthchecks extends Healthchecks {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.generator.v0.models.Healthcheck] = {
         val urlPath = Seq("_internal_", "healthcheck")
 
-        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.generator.v0.models.Healthcheck]("io.apibuilder.generator.v0.models.Healthcheck", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Map[String, String]] = {
         val urlPath = Seq("_internal_", "migrate")
 
-        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Map[String, String]]("Map[String, String]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -464,7 +486,8 @@ def closeAsyncHttpClient(): Unit = {
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Item]] = {
         val urlPath = Seq("items")
 
@@ -474,7 +497,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Item]]("Seq[io.apibuilder.api.v0.models.Item]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -482,11 +505,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Item] = {
         val urlPath = Seq("items", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Item]("io.apibuilder.api.v0.models.Item", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -502,7 +526,8 @@ def closeAsyncHttpClient(): Unit = {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val urlPath = Seq("membership_requests")
 
@@ -515,7 +540,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.MembershipRequest]]("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -525,7 +550,8 @@ def closeAsyncHttpClient(): Unit = {
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.MembershipRequest] = {
         val urlPath = Seq("membership_requests")
 
@@ -536,7 +562,7 @@ def closeAsyncHttpClient(): Unit = {
           "role" -> role
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.MembershipRequest]("io.apibuilder.api.v0.models.MembershipRequest", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -545,11 +571,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "accept")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -558,11 +585,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "decline")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -578,7 +606,8 @@ def closeAsyncHttpClient(): Unit = {
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val urlPath = Seq("memberships")
 
@@ -591,7 +620,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Membership]]("Seq[io.apibuilder.api.v0.models.Membership]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -599,11 +628,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Membership] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Membership]("io.apibuilder.api.v0.models.Membership", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -612,11 +642,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -632,7 +663,8 @@ def closeAsyncHttpClient(): Unit = {
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val urlPath = Seq("organizations")
 
@@ -646,7 +678,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Organization]]("Seq[io.apibuilder.api.v0.models.Organization]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -654,11 +686,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -667,13 +700,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations")
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -683,13 +717,14 @@ def closeAsyncHttpClient(): Unit = {
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -698,11 +733,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -713,7 +749,8 @@ def closeAsyncHttpClient(): Unit = {
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val urlPath = Seq("organizations", key, "attributes")
 
@@ -723,7 +760,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.AttributeValue]]("Seq[io.apibuilder.api.v0.models.AttributeValue]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -732,11 +769,12 @@ def closeAsyncHttpClient(): Unit = {
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -747,13 +785,14 @@ def closeAsyncHttpClient(): Unit = {
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
         val (payload, formPayload) = (Some(attributeValueForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -765,11 +804,12 @@ def closeAsyncHttpClient(): Unit = {
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 401 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -781,13 +821,14 @@ def closeAsyncHttpClient(): Unit = {
     object PasswordResetRequests extends PasswordResetRequests {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("password_reset_requests")
 
         val (payload, formPayload) = (Some(passwordResetRequest), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -798,13 +839,14 @@ def closeAsyncHttpClient(): Unit = {
     object PasswordResets extends PasswordResets {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val urlPath = Seq("password_resets")
 
         val (payload, formPayload) = (Some(passwordReset), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.PasswordResetSuccess]("io.apibuilder.api.v0.models.PasswordResetSuccess", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -820,7 +862,8 @@ def closeAsyncHttpClient(): Unit = {
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val urlPath = Seq("subscriptions")
 
@@ -833,7 +876,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Subscription]]("Seq[io.apibuilder.api.v0.models.Subscription]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -841,11 +884,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -854,13 +898,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions")
 
         val (payload, formPayload) = (Some(subscriptionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -869,11 +914,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -886,7 +932,8 @@ def closeAsyncHttpClient(): Unit = {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Token]] = {
         val urlPath = Seq("tokens", "users", userGuid.toString)
 
@@ -896,7 +943,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Token]]("Seq[io.apibuilder.api.v0.models.Token]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -904,11 +951,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.CleartextToken] = {
         val urlPath = Seq("tokens", guid.toString, "cleartext")
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.CleartextToken]("io.apibuilder.api.v0.models.CleartextToken", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -917,13 +965,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Token] = {
         val urlPath = Seq("tokens")
 
         val (payload, formPayload) = (Some(tokenForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Token]("io.apibuilder.api.v0.models.Token", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -932,11 +981,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("tokens", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -948,7 +998,8 @@ def closeAsyncHttpClient(): Unit = {
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.User]] = {
         val urlPath = Seq("users")
 
@@ -958,7 +1009,7 @@ def closeAsyncHttpClient(): Unit = {
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.User]]("Seq[io.apibuilder.api.v0.models.User]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -966,11 +1017,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -980,7 +1032,8 @@ def closeAsyncHttpClient(): Unit = {
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", "authenticate")
 
@@ -990,7 +1043,7 @@ def closeAsyncHttpClient(): Unit = {
           "password" -> password
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -999,13 +1052,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users")
 
         val (payload, formPayload) = (Some(userForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1015,13 +1069,14 @@ def closeAsyncHttpClient(): Unit = {
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
         val (payload, formPayload) = (Some(userUpdateForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1032,13 +1087,14 @@ def closeAsyncHttpClient(): Unit = {
     object Validations extends Validations {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Validation] = {
         val urlPath = Seq("validations")
 
         val (payload, formPayload) = (Some(value), None)
 
-        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Validation]("io.apibuilder.api.v0.models.Validation", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1051,7 +1107,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Version]] = {
         val urlPath = Seq(orgKey, applicationKey)
 
@@ -1060,7 +1117,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Version]]("Seq[io.apibuilder.api.v0.models.Version]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1070,11 +1127,12 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -1085,13 +1143,14 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1103,13 +1162,14 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1120,11 +1180,12 @@ def closeAsyncHttpClient(): Unit = {
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1139,7 +1200,8 @@ def closeAsyncHttpClient(): Unit = {
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val urlPath = Seq("watches")
 
@@ -1152,7 +1214,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Seq[io.apibuilder.api.v0.models.Watch]]("Seq[io.apibuilder.api.v0.models.Watch]", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1160,11 +1222,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 404 => fs2.Task.fail(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -1175,7 +1238,8 @@ def closeAsyncHttpClient(): Unit = {
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Boolean] = {
         val urlPath = Seq("watches", "check")
 
@@ -1185,7 +1249,7 @@ def closeAsyncHttpClient(): Unit = {
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[Boolean]("Boolean", r)
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1193,13 +1257,14 @@ def closeAsyncHttpClient(): Unit = {
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches")
 
         val (payload, formPayload) = (Some(watchForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 409 => fs2.Task.fail(new io.apibuilder.api.v0.errors.ErrorsResponse(r))
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -1208,11 +1273,12 @@ def closeAsyncHttpClient(): Unit = {
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request => org.http4s.Request = identity
       ): fs2.Task[Unit] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => fs2.Task.now(())
           case r => fs2.Task.fail(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1237,7 +1303,8 @@ def closeAsyncHttpClient(): Unit = {
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     )(handler: org.http4s.Response => fs2.Task[U]
     )(implicit encoder: io.circe.Encoder[T]): fs2.Task[U] = {
       import org.http4s.QueryParamEncoder._
@@ -1256,9 +1323,7 @@ def closeAsyncHttpClient(): Unit = {
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request(method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request(method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -1269,9 +1334,10 @@ def closeAsyncHttpClient(): Unit = {
         case a => sys.error("Invalid authorization scheme[" + a.getClass + "]")
       }
 
+      val decoratedRequest = requestModifier(reqAndMaybeAuth)
       val reqAndMaybeAuthAndBody =
-        if (formBody.nonEmpty) formBody.fold(fs2.Task.now(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
-        else body.fold(fs2.Task.now(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
+        if (formBody.nonEmpty) formBody.fold(fs2.Task.now(decoratedRequest))(decoratedRequest.withBody)
+        else body.fold(fs2.Task.now(decoratedRequest))(decoratedRequest.withBody)
 
       asyncHttpClient.fetch(modifyRequest(reqAndMaybeAuthAndBody))(handler)
     }
@@ -1349,7 +1415,8 @@ def closeAsyncHttpClient(): Unit = {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -1358,7 +1425,8 @@ def closeAsyncHttpClient(): Unit = {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -1368,7 +1436,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -1377,7 +1446,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
 
     /**
@@ -1387,7 +1457,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application]
   }
 
@@ -1405,7 +1476,8 @@ def closeAsyncHttpClient(): Unit = {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -1413,7 +1485,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -1421,7 +1494,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -1430,7 +1504,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1446,7 +1521,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -1464,7 +1540,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Code]
   }
 
@@ -1475,7 +1552,8 @@ def closeAsyncHttpClient(): Unit = {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -1484,7 +1562,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1494,7 +1573,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1511,17 +1591,20 @@ def closeAsyncHttpClient(): Unit = {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -1529,7 +1612,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1553,22 +1637,26 @@ def closeAsyncHttpClient(): Unit = {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Map[String, String]]
   }
 
@@ -1582,12 +1670,14 @@ def closeAsyncHttpClient(): Unit = {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Item]
   }
 
@@ -1605,7 +1695,8 @@ def closeAsyncHttpClient(): Unit = {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -1615,7 +1706,8 @@ def closeAsyncHttpClient(): Unit = {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -1624,7 +1716,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
 
     /**
@@ -1633,7 +1726,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1651,17 +1745,20 @@ def closeAsyncHttpClient(): Unit = {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1687,7 +1784,8 @@ def closeAsyncHttpClient(): Unit = {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -1695,7 +1793,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1703,7 +1802,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1712,7 +1812,8 @@ def closeAsyncHttpClient(): Unit = {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1720,7 +1821,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
 
     /**
@@ -1736,7 +1838,8 @@ def closeAsyncHttpClient(): Unit = {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -1745,7 +1848,8 @@ def closeAsyncHttpClient(): Unit = {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -1755,7 +1859,8 @@ def closeAsyncHttpClient(): Unit = {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -1765,7 +1870,8 @@ def closeAsyncHttpClient(): Unit = {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1776,7 +1882,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1788,7 +1895,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -1810,7 +1918,8 @@ def closeAsyncHttpClient(): Unit = {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -1818,7 +1927,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -1826,12 +1936,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1845,7 +1957,8 @@ def closeAsyncHttpClient(): Unit = {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -1853,7 +1966,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -1861,12 +1975,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -1883,7 +1999,8 @@ def closeAsyncHttpClient(): Unit = {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -1891,7 +2008,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1902,7 +2020,8 @@ def closeAsyncHttpClient(): Unit = {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1910,7 +2029,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1919,14 +2039,16 @@ def closeAsyncHttpClient(): Unit = {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -1944,7 +2066,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -1957,7 +2080,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1967,7 +2091,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1978,7 +2103,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1988,7 +2114,8 @@ def closeAsyncHttpClient(): Unit = {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
@@ -2010,7 +2137,8 @@ def closeAsyncHttpClient(): Unit = {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -2018,7 +2146,8 @@ def closeAsyncHttpClient(): Unit = {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -2031,7 +2160,8 @@ def closeAsyncHttpClient(): Unit = {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Boolean]
 
     /**
@@ -2039,12 +2169,14 @@ def closeAsyncHttpClient(): Unit = {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit]
   }
 
diff --git a/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0MockClient.scala.txt b/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0MockClient.scala.txt
index c9ce3c7cf..5ccf8e885 100644
--- a/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0MockClient.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/017/BryzekApidocApiV0MockClient.scala.txt
@@ -56,7 +56,8 @@ package io.apibuilder.api.v0.mock {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Application]] = fs2.Task.now {
       Nil
     }
@@ -67,7 +68,8 @@ package io.apibuilder.api.v0.mock {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -79,7 +81,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -90,7 +93,8 @@ package io.apibuilder.api.v0.mock {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -102,7 +106,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Application] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -126,7 +131,8 @@ package io.apibuilder.api.v0.mock {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Attribute]] = fs2.Task.now {
       Nil
     }
@@ -136,7 +142,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Attribute] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeAttribute()
     }
@@ -146,7 +153,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Attribute] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeAttribute()
     }
@@ -157,7 +165,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -179,7 +188,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Change]] = fs2.Task.now {
       Nil
     }
@@ -203,7 +213,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Code] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeCode()
     }
@@ -215,13 +226,15 @@ package io.apibuilder.api.v0.mock {
   trait MockHealthchecks extends io.apibuilder.api.v0.Healthchecks {
 
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.generator.v0.models.Healthcheck] = fs2.Task.now {
       io.apibuilder.generator.v0.mock.Factories.makeHealthcheck()
     }
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Map[String, String]] = fs2.Task.now {
       Map()
     }
@@ -238,7 +251,8 @@ package io.apibuilder.api.v0.mock {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Domain] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeDomain()
     }
@@ -249,7 +263,8 @@ package io.apibuilder.api.v0.mock {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -265,7 +280,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -288,21 +304,24 @@ package io.apibuilder.api.v0.mock {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorService]] = fs2.Task.now {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorService()
     }
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorService] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorService()
     }
@@ -312,7 +331,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -342,14 +362,16 @@ package io.apibuilder.api.v0.mock {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = fs2.Task.now {
       Nil
     }
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.GeneratorWithService] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorWithService()
     }
@@ -369,14 +391,16 @@ package io.apibuilder.api.v0.mock {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Item]] = fs2.Task.now {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Item] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeItem()
     }
@@ -400,21 +424,24 @@ package io.apibuilder.api.v0.mock {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Membership]] = fs2.Task.now {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Membership] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeMembership()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -438,7 +465,8 @@ package io.apibuilder.api.v0.mock {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = fs2.Task.now {
       Nil
     }
@@ -450,7 +478,8 @@ package io.apibuilder.api.v0.mock {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.MembershipRequest] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeMembershipRequest()
     }
@@ -461,7 +490,8 @@ package io.apibuilder.api.v0.mock {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -472,7 +502,8 @@ package io.apibuilder.api.v0.mock {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -504,7 +535,8 @@ package io.apibuilder.api.v0.mock {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Organization]] = fs2.Task.now {
       Nil
     }
@@ -514,7 +546,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -524,7 +557,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -535,7 +569,8 @@ package io.apibuilder.api.v0.mock {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Organization] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -545,7 +580,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -563,7 +599,8 @@ package io.apibuilder.api.v0.mock {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.AttributeValue]] = fs2.Task.now {
       Nil
     }
@@ -574,7 +611,8 @@ package io.apibuilder.api.v0.mock {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeAttributeValue()
     }
@@ -586,7 +624,8 @@ package io.apibuilder.api.v0.mock {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.AttributeValue] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeAttributeValue()
     }
@@ -598,7 +637,8 @@ package io.apibuilder.api.v0.mock {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -616,7 +656,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.PasswordResetSuccess] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makePasswordResetSuccess()
     }
@@ -633,7 +674,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -661,7 +703,8 @@ package io.apibuilder.api.v0.mock {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Subscription]] = fs2.Task.now {
       Nil
     }
@@ -671,7 +714,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Subscription] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeSubscription()
     }
@@ -681,14 +725,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Subscription] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeSubscription()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -708,7 +754,8 @@ package io.apibuilder.api.v0.mock {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Token]] = fs2.Task.now {
       Nil
     }
@@ -718,7 +765,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.CleartextToken] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeCleartextToken()
     }
@@ -728,14 +776,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Token] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeToken()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -758,7 +808,8 @@ package io.apibuilder.api.v0.mock {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.User]] = fs2.Task.now {
       Nil
     }
@@ -768,7 +819,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -781,7 +833,8 @@ package io.apibuilder.api.v0.mock {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -791,7 +844,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -802,7 +856,8 @@ package io.apibuilder.api.v0.mock {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.User] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -815,7 +870,8 @@ package io.apibuilder.api.v0.mock {
 
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Validation] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeValidation()
     }
@@ -839,7 +895,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Version]] = fs2.Task.now {
       Nil
     }
@@ -854,7 +911,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -866,7 +924,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -879,7 +938,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Version] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -891,7 +951,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
@@ -919,7 +980,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Seq[io.apibuilder.api.v0.models.Watch]] = fs2.Task.now {
       Nil
     }
@@ -929,7 +991,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Watch] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeWatch()
     }
@@ -944,7 +1007,8 @@ package io.apibuilder.api.v0.mock {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Boolean] = fs2.Task.now {
       true
     }
@@ -954,14 +1018,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[io.apibuilder.api.v0.models.Watch] = fs2.Task.now {
       io.apibuilder.api.v0.mock.Factories.makeWatch()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request => org.http4s.Request = identity
     ): fs2.Task[Unit] = fs2.Task.now {
       // unit type
     }
diff --git a/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0Client.scala.txt b/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0Client.scala.txt
index 8a4ff3c6f..c5ffc845c 100644
--- a/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0Client.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0Client.scala.txt
@@ -1884,7 +1884,8 @@ import scala.language.higherKinds
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Application]] = {
         val urlPath = Seq(orgKey)
 
@@ -1897,7 +1898,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Application]]("Seq[io.apibuilder.api.v0.models.Application]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1906,13 +1907,14 @@ import scala.language.higherKinds
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1923,13 +1925,14 @@ import scala.language.higherKinds
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1939,11 +1942,12 @@ import scala.language.higherKinds
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq(orgKey, applicationKey)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1953,13 +1957,14 @@ import scala.language.higherKinds
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey, "move")
 
         val (payload, formPayload) = (Some(moveForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1973,7 +1978,8 @@ import scala.language.higherKinds
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val urlPath = Seq("attributes")
 
@@ -1984,7 +1990,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Attribute]]("Seq[io.apibuilder.api.v0.models.Attribute]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1992,11 +1998,12 @@ import scala.language.higherKinds
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2005,13 +2012,14 @@ import scala.language.higherKinds
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes")
 
         val (payload, formPayload) = (Some(attributeForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
@@ -2021,11 +2029,12 @@ import scala.language.higherKinds
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2040,7 +2049,8 @@ import scala.language.higherKinds
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Change]] = {
         val urlPath = Seq("changes")
 
@@ -2051,7 +2061,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Change]]("Seq[io.apibuilder.api.v0.models.Change]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2064,11 +2074,12 @@ import scala.language.higherKinds
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Code] = {
         val urlPath = Seq(orgKey, applicationKey, version, generatorKey)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Code]("io.apibuilder.api.v0.models.Code", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
@@ -2081,13 +2092,14 @@ import scala.language.higherKinds
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Domain] = {
         val urlPath = Seq("domains", orgKey)
 
         val (payload, formPayload) = (Some(domain), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Domain]("io.apibuilder.api.v0.models.Domain", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2097,11 +2109,12 @@ import scala.language.higherKinds
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("domains", orgKey, name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2111,13 +2124,14 @@ import scala.language.higherKinds
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms[F] {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("email_verification_confirmations")
 
         val (payload, formPayload) = (Some(emailVerificationConfirmationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2132,7 +2146,8 @@ import scala.language.higherKinds
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val urlPath = Seq("generator_services")
 
@@ -2144,7 +2159,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.GeneratorService]]("Seq[io.apibuilder.api.v0.models.GeneratorService]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2152,11 +2167,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2165,13 +2181,14 @@ import scala.language.higherKinds
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services")
 
         val (payload, formPayload) = (Some(generatorServiceForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2180,11 +2197,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 403 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2202,7 +2220,8 @@ import scala.language.higherKinds
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val urlPath = Seq("generators")
 
@@ -2216,7 +2235,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2224,11 +2243,12 @@ import scala.language.higherKinds
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorWithService] = {
         val urlPath = Seq("generators", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorWithService]("io.apibuilder.api.v0.models.GeneratorWithService", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2238,22 +2258,24 @@ import scala.language.higherKinds
 
     object Healthchecks extends Healthchecks[F] {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.generator.v0.models.Healthcheck] = {
         val urlPath = Seq("_internal_", "healthcheck")
 
-        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.generator.v0.models.Healthcheck]("io.apibuilder.generator.v0.models.Healthcheck", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Map[String, String]] = {
         val urlPath = Seq("_internal_", "migrate")
 
-        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Map[String, String]]("Map[String, String]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2265,7 +2287,8 @@ import scala.language.higherKinds
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Item]] = {
         val urlPath = Seq("items")
 
@@ -2275,7 +2298,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Item]]("Seq[io.apibuilder.api.v0.models.Item]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2283,11 +2306,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Item] = {
         val urlPath = Seq("items", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Item]("io.apibuilder.api.v0.models.Item", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2303,7 +2327,8 @@ import scala.language.higherKinds
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val urlPath = Seq("membership_requests")
 
@@ -2316,7 +2341,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2326,7 +2351,8 @@ import scala.language.higherKinds
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.MembershipRequest] = {
         val urlPath = Seq("membership_requests")
 
@@ -2337,7 +2363,7 @@ import scala.language.higherKinds
           "role" -> role
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.MembershipRequest]("io.apibuilder.api.v0.models.MembershipRequest", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2346,11 +2372,12 @@ import scala.language.higherKinds
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "accept")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2359,11 +2386,12 @@ import scala.language.higherKinds
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "decline")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2379,7 +2407,8 @@ import scala.language.higherKinds
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val urlPath = Seq("memberships")
 
@@ -2392,7 +2421,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Membership]]("Seq[io.apibuilder.api.v0.models.Membership]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2400,11 +2429,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Membership] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Membership]("io.apibuilder.api.v0.models.Membership", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2413,11 +2443,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2433,7 +2464,8 @@ import scala.language.higherKinds
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val urlPath = Seq("organizations")
 
@@ -2447,7 +2479,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Organization]]("Seq[io.apibuilder.api.v0.models.Organization]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2455,11 +2487,12 @@ import scala.language.higherKinds
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2468,13 +2501,14 @@ import scala.language.higherKinds
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations")
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2484,13 +2518,14 @@ import scala.language.higherKinds
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2499,11 +2534,12 @@ import scala.language.higherKinds
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2514,7 +2550,8 @@ import scala.language.higherKinds
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val urlPath = Seq("organizations", key, "attributes")
 
@@ -2524,7 +2561,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.AttributeValue]]("Seq[io.apibuilder.api.v0.models.AttributeValue]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2533,11 +2570,12 @@ import scala.language.higherKinds
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2548,13 +2586,14 @@ import scala.language.higherKinds
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
         val (payload, formPayload) = (Some(attributeValueForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2566,11 +2605,12 @@ import scala.language.higherKinds
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2582,13 +2622,14 @@ import scala.language.higherKinds
     object PasswordResetRequests extends PasswordResetRequests[F] {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("password_reset_requests")
 
         val (payload, formPayload) = (Some(passwordResetRequest), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2599,13 +2640,14 @@ import scala.language.higherKinds
     object PasswordResets extends PasswordResets[F] {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val urlPath = Seq("password_resets")
 
         val (payload, formPayload) = (Some(passwordReset), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.PasswordResetSuccess]("io.apibuilder.api.v0.models.PasswordResetSuccess", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2621,7 +2663,8 @@ import scala.language.higherKinds
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val urlPath = Seq("subscriptions")
 
@@ -2634,7 +2677,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Subscription]]("Seq[io.apibuilder.api.v0.models.Subscription]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2642,11 +2685,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2655,13 +2699,14 @@ import scala.language.higherKinds
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions")
 
         val (payload, formPayload) = (Some(subscriptionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -2670,11 +2715,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2687,7 +2733,8 @@ import scala.language.higherKinds
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Token]] = {
         val urlPath = Seq("tokens", "users", userGuid.toString)
 
@@ -2697,7 +2744,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Token]]("Seq[io.apibuilder.api.v0.models.Token]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2705,11 +2752,12 @@ import scala.language.higherKinds
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.CleartextToken] = {
         val urlPath = Seq("tokens", guid.toString, "cleartext")
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.CleartextToken]("io.apibuilder.api.v0.models.CleartextToken", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2718,13 +2766,14 @@ import scala.language.higherKinds
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Token] = {
         val urlPath = Seq("tokens")
 
         val (payload, formPayload) = (Some(tokenForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Token]("io.apibuilder.api.v0.models.Token", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -2733,11 +2782,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("tokens", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2749,7 +2799,8 @@ import scala.language.higherKinds
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.User]] = {
         val urlPath = Seq("users")
 
@@ -2759,7 +2810,7 @@ import scala.language.higherKinds
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.User]]("Seq[io.apibuilder.api.v0.models.User]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2767,11 +2818,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2781,7 +2833,8 @@ import scala.language.higherKinds
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", "authenticate")
 
@@ -2791,7 +2844,7 @@ import scala.language.higherKinds
           "password" -> password
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2800,13 +2853,14 @@ import scala.language.higherKinds
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users")
 
         val (payload, formPayload) = (Some(userForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2816,13 +2870,14 @@ import scala.language.higherKinds
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
         val (payload, formPayload) = (Some(userUpdateForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2833,13 +2888,14 @@ import scala.language.higherKinds
     object Validations extends Validations[F] {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Validation] = {
         val urlPath = Seq("validations")
 
         val (payload, formPayload) = (Some(value), None)
 
-        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Validation]("io.apibuilder.api.v0.models.Validation", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2852,7 +2908,8 @@ import scala.language.higherKinds
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Version]] = {
         val urlPath = Seq(orgKey, applicationKey)
 
@@ -2861,7 +2918,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Version]]("Seq[io.apibuilder.api.v0.models.Version]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2871,11 +2928,12 @@ import scala.language.higherKinds
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2886,13 +2944,14 @@ import scala.language.higherKinds
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2904,13 +2963,14 @@ import scala.language.higherKinds
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2921,11 +2981,12 @@ import scala.language.higherKinds
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2940,7 +3001,8 @@ import scala.language.higherKinds
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val urlPath = Seq("watches")
 
@@ -2953,7 +3015,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Watch]]("Seq[io.apibuilder.api.v0.models.Watch]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2961,11 +3023,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2976,7 +3039,8 @@ import scala.language.higherKinds
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Boolean] = {
         val urlPath = Seq("watches", "check")
 
@@ -2986,7 +3050,7 @@ import scala.language.higherKinds
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Boolean]("Boolean", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2994,13 +3058,14 @@ import scala.language.higherKinds
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches")
 
         val (payload, formPayload) = (Some(watchForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -3009,11 +3074,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -3038,7 +3104,8 @@ import scala.language.higherKinds
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     )(handler: org.http4s.Response[F] => F[U]
     )(implicit encoder: io.circe.Encoder[T]): F[U] = {
       import org.http4s.QueryParamEncoder._
@@ -3057,9 +3124,7 @@ import scala.language.higherKinds
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request[F](method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request[F](method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -3070,9 +3135,10 @@ import scala.language.higherKinds
         case a => sys.error("Invalid authorization scheme[" + a.getClass + "]")
       }
 
+      val decoratedRequest = requestModifier(reqAndMaybeAuth)
       val reqAndMaybeAuthAndBody =
-        if (formBody.nonEmpty) formBody.fold(Sync[F].pure(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
-        else body.fold(Sync[F].pure(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
+        if (formBody.nonEmpty) formBody.fold(Sync[F].pure(decoratedRequest))(decoratedRequest.withBody)
+        else body.fold(Sync[F].pure(decoratedRequest))(decoratedRequest.withBody)
 
       httpClient.fetch(modifyRequest(reqAndMaybeAuthAndBody))(handler)
     }
@@ -3147,7 +3213,8 @@ import scala.language.higherKinds
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -3156,7 +3223,8 @@ import scala.language.higherKinds
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3166,7 +3234,8 @@ import scala.language.higherKinds
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3175,7 +3244,8 @@ import scala.language.higherKinds
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -3185,7 +3255,8 @@ import scala.language.higherKinds
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
   }
 
@@ -3203,7 +3274,8 @@ import scala.language.higherKinds
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -3211,7 +3283,8 @@ import scala.language.higherKinds
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3219,7 +3292,8 @@ import scala.language.higherKinds
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3228,7 +3302,8 @@ import scala.language.higherKinds
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3244,7 +3319,8 @@ import scala.language.higherKinds
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -3262,7 +3338,8 @@ import scala.language.higherKinds
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Code]
   }
 
@@ -3273,7 +3350,8 @@ import scala.language.higherKinds
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -3282,7 +3360,8 @@ import scala.language.higherKinds
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3292,7 +3371,8 @@ import scala.language.higherKinds
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3309,17 +3389,20 @@ import scala.language.higherKinds
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -3327,7 +3410,8 @@ import scala.language.higherKinds
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3351,22 +3435,26 @@ import scala.language.higherKinds
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks[F[_]] {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Map[String, String]]
   }
 
@@ -3380,12 +3468,14 @@ import scala.language.higherKinds
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Item]
   }
 
@@ -3403,7 +3493,8 @@ import scala.language.higherKinds
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -3413,7 +3504,8 @@ import scala.language.higherKinds
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -3422,7 +3514,8 @@ import scala.language.higherKinds
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -3431,7 +3524,8 @@ import scala.language.higherKinds
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3449,17 +3543,20 @@ import scala.language.higherKinds
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3485,7 +3582,8 @@ import scala.language.higherKinds
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -3493,7 +3591,8 @@ import scala.language.higherKinds
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3501,7 +3600,8 @@ import scala.language.higherKinds
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3510,7 +3610,8 @@ import scala.language.higherKinds
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3518,7 +3619,8 @@ import scala.language.higherKinds
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -3534,7 +3636,8 @@ import scala.language.higherKinds
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -3543,7 +3646,8 @@ import scala.language.higherKinds
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3553,7 +3657,8 @@ import scala.language.higherKinds
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3563,7 +3668,8 @@ import scala.language.higherKinds
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3574,7 +3680,8 @@ import scala.language.higherKinds
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3586,7 +3693,8 @@ import scala.language.higherKinds
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -3608,7 +3716,8 @@ import scala.language.higherKinds
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -3616,7 +3725,8 @@ import scala.language.higherKinds
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -3624,12 +3734,14 @@ import scala.language.higherKinds
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3643,7 +3755,8 @@ import scala.language.higherKinds
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -3651,7 +3764,8 @@ import scala.language.higherKinds
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -3659,12 +3773,14 @@ import scala.language.higherKinds
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3681,7 +3797,8 @@ import scala.language.higherKinds
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -3689,7 +3806,8 @@ import scala.language.higherKinds
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3700,7 +3818,8 @@ import scala.language.higherKinds
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3708,7 +3827,8 @@ import scala.language.higherKinds
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3717,14 +3837,16 @@ import scala.language.higherKinds
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations[F[_]] {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -3742,7 +3864,8 @@ import scala.language.higherKinds
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -3755,7 +3878,8 @@ import scala.language.higherKinds
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3765,7 +3889,8 @@ import scala.language.higherKinds
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3776,7 +3901,8 @@ import scala.language.higherKinds
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3786,7 +3912,8 @@ import scala.language.higherKinds
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3808,7 +3935,8 @@ import scala.language.higherKinds
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -3816,7 +3944,8 @@ import scala.language.higherKinds
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -3829,7 +3958,8 @@ import scala.language.higherKinds
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Boolean]
 
     /**
@@ -3837,12 +3967,14 @@ import scala.language.higherKinds
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
diff --git a/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0ClientOnly.scala.txt b/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0ClientOnly.scala.txt
index b0eb63f4d..ed96595cc 100644
--- a/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0ClientOnly.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0ClientOnly.scala.txt
@@ -82,7 +82,8 @@ import scala.language.higherKinds
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Application]] = {
         val urlPath = Seq(orgKey)
 
@@ -95,7 +96,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Application]]("Seq[io.apibuilder.api.v0.models.Application]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -104,13 +105,14 @@ import scala.language.higherKinds
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -121,13 +123,14 @@ import scala.language.higherKinds
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -137,11 +140,12 @@ import scala.language.higherKinds
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq(orgKey, applicationKey)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -151,13 +155,14 @@ import scala.language.higherKinds
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey, "move")
 
         val (payload, formPayload) = (Some(moveForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -171,7 +176,8 @@ import scala.language.higherKinds
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val urlPath = Seq("attributes")
 
@@ -182,7 +188,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Attribute]]("Seq[io.apibuilder.api.v0.models.Attribute]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -190,11 +196,12 @@ import scala.language.higherKinds
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -203,13 +210,14 @@ import scala.language.higherKinds
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes")
 
         val (payload, formPayload) = (Some(attributeForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
@@ -219,11 +227,12 @@ import scala.language.higherKinds
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -238,7 +247,8 @@ import scala.language.higherKinds
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Change]] = {
         val urlPath = Seq("changes")
 
@@ -249,7 +259,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Change]]("Seq[io.apibuilder.api.v0.models.Change]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -262,11 +272,12 @@ import scala.language.higherKinds
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Code] = {
         val urlPath = Seq(orgKey, applicationKey, version, generatorKey)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Code]("io.apibuilder.api.v0.models.Code", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
@@ -279,13 +290,14 @@ import scala.language.higherKinds
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Domain] = {
         val urlPath = Seq("domains", orgKey)
 
         val (payload, formPayload) = (Some(domain), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Domain]("io.apibuilder.api.v0.models.Domain", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -295,11 +307,12 @@ import scala.language.higherKinds
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("domains", orgKey, name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -309,13 +322,14 @@ import scala.language.higherKinds
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms[F] {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("email_verification_confirmations")
 
         val (payload, formPayload) = (Some(emailVerificationConfirmationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -330,7 +344,8 @@ import scala.language.higherKinds
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val urlPath = Seq("generator_services")
 
@@ -342,7 +357,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.GeneratorService]]("Seq[io.apibuilder.api.v0.models.GeneratorService]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -350,11 +365,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -363,13 +379,14 @@ import scala.language.higherKinds
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services")
 
         val (payload, formPayload) = (Some(generatorServiceForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -378,11 +395,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 403 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -400,7 +418,8 @@ import scala.language.higherKinds
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val urlPath = Seq("generators")
 
@@ -414,7 +433,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -422,11 +441,12 @@ import scala.language.higherKinds
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorWithService] = {
         val urlPath = Seq("generators", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorWithService]("io.apibuilder.api.v0.models.GeneratorWithService", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -436,22 +456,24 @@ import scala.language.higherKinds
 
     object Healthchecks extends Healthchecks[F] {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.generator.v0.models.Healthcheck] = {
         val urlPath = Seq("_internal_", "healthcheck")
 
-        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.generator.v0.models.Healthcheck]("io.apibuilder.generator.v0.models.Healthcheck", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Map[String, String]] = {
         val urlPath = Seq("_internal_", "migrate")
 
-        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Map[String, String]]("Map[String, String]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -463,7 +485,8 @@ import scala.language.higherKinds
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Item]] = {
         val urlPath = Seq("items")
 
@@ -473,7 +496,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Item]]("Seq[io.apibuilder.api.v0.models.Item]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -481,11 +504,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Item] = {
         val urlPath = Seq("items", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Item]("io.apibuilder.api.v0.models.Item", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -501,7 +525,8 @@ import scala.language.higherKinds
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val urlPath = Seq("membership_requests")
 
@@ -514,7 +539,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -524,7 +549,8 @@ import scala.language.higherKinds
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.MembershipRequest] = {
         val urlPath = Seq("membership_requests")
 
@@ -535,7 +561,7 @@ import scala.language.higherKinds
           "role" -> role
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.MembershipRequest]("io.apibuilder.api.v0.models.MembershipRequest", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -544,11 +570,12 @@ import scala.language.higherKinds
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "accept")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -557,11 +584,12 @@ import scala.language.higherKinds
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "decline")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -577,7 +605,8 @@ import scala.language.higherKinds
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val urlPath = Seq("memberships")
 
@@ -590,7 +619,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Membership]]("Seq[io.apibuilder.api.v0.models.Membership]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -598,11 +627,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Membership] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Membership]("io.apibuilder.api.v0.models.Membership", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -611,11 +641,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -631,7 +662,8 @@ import scala.language.higherKinds
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val urlPath = Seq("organizations")
 
@@ -645,7 +677,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Organization]]("Seq[io.apibuilder.api.v0.models.Organization]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -653,11 +685,12 @@ import scala.language.higherKinds
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -666,13 +699,14 @@ import scala.language.higherKinds
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations")
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -682,13 +716,14 @@ import scala.language.higherKinds
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -697,11 +732,12 @@ import scala.language.higherKinds
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -712,7 +748,8 @@ import scala.language.higherKinds
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val urlPath = Seq("organizations", key, "attributes")
 
@@ -722,7 +759,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.AttributeValue]]("Seq[io.apibuilder.api.v0.models.AttributeValue]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -731,11 +768,12 @@ import scala.language.higherKinds
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -746,13 +784,14 @@ import scala.language.higherKinds
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
         val (payload, formPayload) = (Some(attributeValueForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -764,11 +803,12 @@ import scala.language.higherKinds
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -780,13 +820,14 @@ import scala.language.higherKinds
     object PasswordResetRequests extends PasswordResetRequests[F] {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("password_reset_requests")
 
         val (payload, formPayload) = (Some(passwordResetRequest), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -797,13 +838,14 @@ import scala.language.higherKinds
     object PasswordResets extends PasswordResets[F] {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val urlPath = Seq("password_resets")
 
         val (payload, formPayload) = (Some(passwordReset), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.PasswordResetSuccess]("io.apibuilder.api.v0.models.PasswordResetSuccess", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -819,7 +861,8 @@ import scala.language.higherKinds
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val urlPath = Seq("subscriptions")
 
@@ -832,7 +875,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Subscription]]("Seq[io.apibuilder.api.v0.models.Subscription]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -840,11 +883,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -853,13 +897,14 @@ import scala.language.higherKinds
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions")
 
         val (payload, formPayload) = (Some(subscriptionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -868,11 +913,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -885,7 +931,8 @@ import scala.language.higherKinds
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Token]] = {
         val urlPath = Seq("tokens", "users", userGuid.toString)
 
@@ -895,7 +942,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Token]]("Seq[io.apibuilder.api.v0.models.Token]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -903,11 +950,12 @@ import scala.language.higherKinds
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.CleartextToken] = {
         val urlPath = Seq("tokens", guid.toString, "cleartext")
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.CleartextToken]("io.apibuilder.api.v0.models.CleartextToken", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -916,13 +964,14 @@ import scala.language.higherKinds
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Token] = {
         val urlPath = Seq("tokens")
 
         val (payload, formPayload) = (Some(tokenForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Token]("io.apibuilder.api.v0.models.Token", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -931,11 +980,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("tokens", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -947,7 +997,8 @@ import scala.language.higherKinds
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.User]] = {
         val urlPath = Seq("users")
 
@@ -957,7 +1008,7 @@ import scala.language.higherKinds
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.User]]("Seq[io.apibuilder.api.v0.models.User]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -965,11 +1016,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -979,7 +1031,8 @@ import scala.language.higherKinds
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", "authenticate")
 
@@ -989,7 +1042,7 @@ import scala.language.higherKinds
           "password" -> password
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -998,13 +1051,14 @@ import scala.language.higherKinds
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users")
 
         val (payload, formPayload) = (Some(userForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1014,13 +1068,14 @@ import scala.language.higherKinds
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
         val (payload, formPayload) = (Some(userUpdateForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1031,13 +1086,14 @@ import scala.language.higherKinds
     object Validations extends Validations[F] {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Validation] = {
         val urlPath = Seq("validations")
 
         val (payload, formPayload) = (Some(value), None)
 
-        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Validation]("io.apibuilder.api.v0.models.Validation", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1050,7 +1106,8 @@ import scala.language.higherKinds
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Version]] = {
         val urlPath = Seq(orgKey, applicationKey)
 
@@ -1059,7 +1116,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Version]]("Seq[io.apibuilder.api.v0.models.Version]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1069,11 +1126,12 @@ import scala.language.higherKinds
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -1084,13 +1142,14 @@ import scala.language.higherKinds
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1102,13 +1161,14 @@ import scala.language.higherKinds
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1119,11 +1179,12 @@ import scala.language.higherKinds
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1138,7 +1199,8 @@ import scala.language.higherKinds
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val urlPath = Seq("watches")
 
@@ -1151,7 +1213,7 @@ import scala.language.higherKinds
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Watch]]("Seq[io.apibuilder.api.v0.models.Watch]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1159,11 +1221,12 @@ import scala.language.higherKinds
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -1174,7 +1237,8 @@ import scala.language.higherKinds
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Boolean] = {
         val urlPath = Seq("watches", "check")
 
@@ -1184,7 +1248,7 @@ import scala.language.higherKinds
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Boolean]("Boolean", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1192,13 +1256,14 @@ import scala.language.higherKinds
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches")
 
         val (payload, formPayload) = (Some(watchForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -1207,11 +1272,12 @@ import scala.language.higherKinds
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1236,7 +1302,8 @@ import scala.language.higherKinds
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     )(handler: org.http4s.Response[F] => F[U]
     )(implicit encoder: io.circe.Encoder[T]): F[U] = {
       import org.http4s.QueryParamEncoder._
@@ -1255,9 +1322,7 @@ import scala.language.higherKinds
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request[F](method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request[F](method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -1268,9 +1333,10 @@ import scala.language.higherKinds
         case a => sys.error("Invalid authorization scheme[" + a.getClass + "]")
       }
 
+      val decoratedRequest = requestModifier(reqAndMaybeAuth)
       val reqAndMaybeAuthAndBody =
-        if (formBody.nonEmpty) formBody.fold(Sync[F].pure(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
-        else body.fold(Sync[F].pure(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
+        if (formBody.nonEmpty) formBody.fold(Sync[F].pure(decoratedRequest))(decoratedRequest.withBody)
+        else body.fold(Sync[F].pure(decoratedRequest))(decoratedRequest.withBody)
 
       httpClient.fetch(modifyRequest(reqAndMaybeAuthAndBody))(handler)
     }
@@ -1345,7 +1411,8 @@ import scala.language.higherKinds
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -1354,7 +1421,8 @@ import scala.language.higherKinds
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -1364,7 +1432,8 @@ import scala.language.higherKinds
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -1373,7 +1442,8 @@ import scala.language.higherKinds
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -1383,7 +1453,8 @@ import scala.language.higherKinds
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
   }
 
@@ -1401,7 +1472,8 @@ import scala.language.higherKinds
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -1409,7 +1481,8 @@ import scala.language.higherKinds
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -1417,7 +1490,8 @@ import scala.language.higherKinds
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -1426,7 +1500,8 @@ import scala.language.higherKinds
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1442,7 +1517,8 @@ import scala.language.higherKinds
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -1460,7 +1536,8 @@ import scala.language.higherKinds
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Code]
   }
 
@@ -1471,7 +1548,8 @@ import scala.language.higherKinds
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -1480,7 +1558,8 @@ import scala.language.higherKinds
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1490,7 +1569,8 @@ import scala.language.higherKinds
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1507,17 +1587,20 @@ import scala.language.higherKinds
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -1525,7 +1608,8 @@ import scala.language.higherKinds
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1549,22 +1633,26 @@ import scala.language.higherKinds
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks[F[_]] {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Map[String, String]]
   }
 
@@ -1578,12 +1666,14 @@ import scala.language.higherKinds
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Item]
   }
 
@@ -1601,7 +1691,8 @@ import scala.language.higherKinds
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -1611,7 +1702,8 @@ import scala.language.higherKinds
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -1620,7 +1712,8 @@ import scala.language.higherKinds
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -1629,7 +1722,8 @@ import scala.language.higherKinds
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1647,17 +1741,20 @@ import scala.language.higherKinds
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1683,7 +1780,8 @@ import scala.language.higherKinds
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -1691,7 +1789,8 @@ import scala.language.higherKinds
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1699,7 +1798,8 @@ import scala.language.higherKinds
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1708,7 +1808,8 @@ import scala.language.higherKinds
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1716,7 +1817,8 @@ import scala.language.higherKinds
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -1732,7 +1834,8 @@ import scala.language.higherKinds
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -1741,7 +1844,8 @@ import scala.language.higherKinds
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -1751,7 +1855,8 @@ import scala.language.higherKinds
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -1761,7 +1866,8 @@ import scala.language.higherKinds
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1772,7 +1878,8 @@ import scala.language.higherKinds
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1784,7 +1891,8 @@ import scala.language.higherKinds
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -1806,7 +1914,8 @@ import scala.language.higherKinds
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -1814,7 +1923,8 @@ import scala.language.higherKinds
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -1822,12 +1932,14 @@ import scala.language.higherKinds
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1841,7 +1953,8 @@ import scala.language.higherKinds
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -1849,7 +1962,8 @@ import scala.language.higherKinds
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -1857,12 +1971,14 @@ import scala.language.higherKinds
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1879,7 +1995,8 @@ import scala.language.higherKinds
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -1887,7 +2004,8 @@ import scala.language.higherKinds
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1898,7 +2016,8 @@ import scala.language.higherKinds
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1906,7 +2025,8 @@ import scala.language.higherKinds
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1915,14 +2035,16 @@ import scala.language.higherKinds
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations[F[_]] {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -1940,7 +2062,8 @@ import scala.language.higherKinds
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -1953,7 +2076,8 @@ import scala.language.higherKinds
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1963,7 +2087,8 @@ import scala.language.higherKinds
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1974,7 +2099,8 @@ import scala.language.higherKinds
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1984,7 +2110,8 @@ import scala.language.higherKinds
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -2006,7 +2133,8 @@ import scala.language.higherKinds
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -2014,7 +2142,8 @@ import scala.language.higherKinds
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -2027,7 +2156,8 @@ import scala.language.higherKinds
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Boolean]
 
     /**
@@ -2035,12 +2165,14 @@ import scala.language.higherKinds
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
diff --git a/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0MockClient.scala.txt b/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0MockClient.scala.txt
index 44b1670df..50cbdb262 100644
--- a/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0MockClient.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/018/BryzekApidocApiV0MockClient.scala.txt
@@ -54,7 +54,8 @@ package io.apibuilder.api.v0.mock {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Application]] = cats.Applicative[F].pure {
       Nil
     }
@@ -65,7 +66,8 @@ package io.apibuilder.api.v0.mock {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -77,7 +79,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -88,7 +91,8 @@ package io.apibuilder.api.v0.mock {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -100,7 +104,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -122,7 +127,8 @@ package io.apibuilder.api.v0.mock {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Attribute]] = cats.Applicative[F].pure {
       Nil
     }
@@ -132,7 +138,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeAttribute()
     }
@@ -142,7 +149,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeAttribute()
     }
@@ -153,7 +161,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -173,7 +182,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Change]] = cats.Applicative[F].pure {
       Nil
     }
@@ -195,7 +205,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Code] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeCode()
     }
@@ -205,13 +216,15 @@ package io.apibuilder.api.v0.mock {
   class MockHealthchecks[F[_]: cats.Applicative] extends io.apibuilder.api.v0.Healthchecks[F] {
 
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.generator.v0.models.Healthcheck] = cats.Applicative[F].pure {
       io.apibuilder.generator.v0.mock.Factories.makeHealthcheck()
     }
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Map[String, String]] = cats.Applicative[F].pure {
       Map()
     }
@@ -226,7 +239,8 @@ package io.apibuilder.api.v0.mock {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Domain] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeDomain()
     }
@@ -237,7 +251,8 @@ package io.apibuilder.api.v0.mock {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -251,7 +266,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -272,21 +288,24 @@ package io.apibuilder.api.v0.mock {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]] = cats.Applicative[F].pure {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorService()
     }
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorService()
     }
@@ -296,7 +315,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -324,14 +344,16 @@ package io.apibuilder.api.v0.mock {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = cats.Applicative[F].pure {
       Nil
     }
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorWithService] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorWithService()
     }
@@ -349,14 +371,16 @@ package io.apibuilder.api.v0.mock {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Item]] = cats.Applicative[F].pure {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Item] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeItem()
     }
@@ -378,21 +402,24 @@ package io.apibuilder.api.v0.mock {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Membership]] = cats.Applicative[F].pure {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Membership] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeMembership()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -414,7 +441,8 @@ package io.apibuilder.api.v0.mock {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = cats.Applicative[F].pure {
       Nil
     }
@@ -426,7 +454,8 @@ package io.apibuilder.api.v0.mock {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.MembershipRequest] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeMembershipRequest()
     }
@@ -437,7 +466,8 @@ package io.apibuilder.api.v0.mock {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -448,7 +478,8 @@ package io.apibuilder.api.v0.mock {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -478,7 +509,8 @@ package io.apibuilder.api.v0.mock {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Organization]] = cats.Applicative[F].pure {
       Nil
     }
@@ -488,7 +520,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -498,7 +531,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -509,7 +543,8 @@ package io.apibuilder.api.v0.mock {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -519,7 +554,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -537,7 +573,8 @@ package io.apibuilder.api.v0.mock {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]] = cats.Applicative[F].pure {
       Nil
     }
@@ -548,7 +585,8 @@ package io.apibuilder.api.v0.mock {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeAttributeValue()
     }
@@ -560,7 +598,8 @@ package io.apibuilder.api.v0.mock {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeAttributeValue()
     }
@@ -572,7 +611,8 @@ package io.apibuilder.api.v0.mock {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -588,7 +628,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.PasswordResetSuccess] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makePasswordResetSuccess()
     }
@@ -603,7 +644,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -629,7 +671,8 @@ package io.apibuilder.api.v0.mock {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Subscription]] = cats.Applicative[F].pure {
       Nil
     }
@@ -639,7 +682,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeSubscription()
     }
@@ -649,14 +693,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeSubscription()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -674,7 +720,8 @@ package io.apibuilder.api.v0.mock {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Token]] = cats.Applicative[F].pure {
       Nil
     }
@@ -684,7 +731,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.CleartextToken] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeCleartextToken()
     }
@@ -694,14 +742,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Token] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeToken()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -722,7 +772,8 @@ package io.apibuilder.api.v0.mock {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.User]] = cats.Applicative[F].pure {
       Nil
     }
@@ -732,7 +783,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -745,7 +797,8 @@ package io.apibuilder.api.v0.mock {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -755,7 +808,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -766,7 +820,8 @@ package io.apibuilder.api.v0.mock {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -777,7 +832,8 @@ package io.apibuilder.api.v0.mock {
 
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Validation] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeValidation()
     }
@@ -799,7 +855,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Version]] = cats.Applicative[F].pure {
       Nil
     }
@@ -814,7 +871,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -826,7 +884,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -839,7 +898,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -851,7 +911,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -877,7 +938,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Watch]] = cats.Applicative[F].pure {
       Nil
     }
@@ -887,7 +949,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeWatch()
     }
@@ -902,7 +965,8 @@ package io.apibuilder.api.v0.mock {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Boolean] = cats.Applicative[F].pure {
       true
     }
@@ -912,14 +976,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeWatch()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
diff --git a/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0Client.scala.txt b/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0Client.scala.txt
index f4ca855b0..721ee339a 100644
--- a/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0Client.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0Client.scala.txt
@@ -1883,7 +1883,8 @@ import io.circe.syntax._
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Application]] = {
         val urlPath = Seq(orgKey)
 
@@ -1896,7 +1897,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Application]]("Seq[io.apibuilder.api.v0.models.Application]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1905,13 +1906,14 @@ import io.circe.syntax._
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1922,13 +1924,14 @@ import io.circe.syntax._
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1938,11 +1941,12 @@ import io.circe.syntax._
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq(orgKey, applicationKey)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1952,13 +1956,14 @@ import io.circe.syntax._
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey, "move")
 
         val (payload, formPayload) = (Some(moveForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1972,7 +1977,8 @@ import io.circe.syntax._
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val urlPath = Seq("attributes")
 
@@ -1983,7 +1989,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Attribute]]("Seq[io.apibuilder.api.v0.models.Attribute]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1991,11 +1997,12 @@ import io.circe.syntax._
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2004,13 +2011,14 @@ import io.circe.syntax._
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes")
 
         val (payload, formPayload) = (Some(attributeForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
@@ -2020,11 +2028,12 @@ import io.circe.syntax._
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2039,7 +2048,8 @@ import io.circe.syntax._
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Change]] = {
         val urlPath = Seq("changes")
 
@@ -2050,7 +2060,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Change]]("Seq[io.apibuilder.api.v0.models.Change]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2063,11 +2073,12 @@ import io.circe.syntax._
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Code] = {
         val urlPath = Seq(orgKey, applicationKey, version, generatorKey)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Code]("io.apibuilder.api.v0.models.Code", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
@@ -2080,13 +2091,14 @@ import io.circe.syntax._
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Domain] = {
         val urlPath = Seq("domains", orgKey)
 
         val (payload, formPayload) = (Some(domain), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Domain]("io.apibuilder.api.v0.models.Domain", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2096,11 +2108,12 @@ import io.circe.syntax._
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("domains", orgKey, name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2110,13 +2123,14 @@ import io.circe.syntax._
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms[F] {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("email_verification_confirmations")
 
         val (payload, formPayload) = (Some(emailVerificationConfirmationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2131,7 +2145,8 @@ import io.circe.syntax._
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val urlPath = Seq("generator_services")
 
@@ -2143,7 +2158,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.GeneratorService]]("Seq[io.apibuilder.api.v0.models.GeneratorService]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2151,11 +2166,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2164,13 +2180,14 @@ import io.circe.syntax._
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services")
 
         val (payload, formPayload) = (Some(generatorServiceForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2179,11 +2196,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 403 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2201,7 +2219,8 @@ import io.circe.syntax._
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val urlPath = Seq("generators")
 
@@ -2215,7 +2234,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2223,11 +2242,12 @@ import io.circe.syntax._
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorWithService] = {
         val urlPath = Seq("generators", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorWithService]("io.apibuilder.api.v0.models.GeneratorWithService", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2237,22 +2257,24 @@ import io.circe.syntax._
 
     object Healthchecks extends Healthchecks[F] {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.generator.v0.models.Healthcheck] = {
         val urlPath = Seq("_internal_", "healthcheck")
 
-        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.generator.v0.models.Healthcheck]("io.apibuilder.generator.v0.models.Healthcheck", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Map[String, String]] = {
         val urlPath = Seq("_internal_", "migrate")
 
-        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Map[String, String]]("Map[String, String]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2264,7 +2286,8 @@ import io.circe.syntax._
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Item]] = {
         val urlPath = Seq("items")
 
@@ -2274,7 +2297,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Item]]("Seq[io.apibuilder.api.v0.models.Item]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2282,11 +2305,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Item] = {
         val urlPath = Seq("items", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Item]("io.apibuilder.api.v0.models.Item", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2302,7 +2326,8 @@ import io.circe.syntax._
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val urlPath = Seq("membership_requests")
 
@@ -2315,7 +2340,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2325,7 +2350,8 @@ import io.circe.syntax._
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.MembershipRequest] = {
         val urlPath = Seq("membership_requests")
 
@@ -2336,7 +2362,7 @@ import io.circe.syntax._
           "role" -> role
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.MembershipRequest]("io.apibuilder.api.v0.models.MembershipRequest", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2345,11 +2371,12 @@ import io.circe.syntax._
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "accept")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2358,11 +2385,12 @@ import io.circe.syntax._
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "decline")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2378,7 +2406,8 @@ import io.circe.syntax._
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val urlPath = Seq("memberships")
 
@@ -2391,7 +2420,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Membership]]("Seq[io.apibuilder.api.v0.models.Membership]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2399,11 +2428,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Membership] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Membership]("io.apibuilder.api.v0.models.Membership", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2412,11 +2442,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2432,7 +2463,8 @@ import io.circe.syntax._
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val urlPath = Seq("organizations")
 
@@ -2446,7 +2478,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Organization]]("Seq[io.apibuilder.api.v0.models.Organization]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2454,11 +2486,12 @@ import io.circe.syntax._
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2467,13 +2500,14 @@ import io.circe.syntax._
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations")
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2483,13 +2517,14 @@ import io.circe.syntax._
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2498,11 +2533,12 @@ import io.circe.syntax._
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2513,7 +2549,8 @@ import io.circe.syntax._
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val urlPath = Seq("organizations", key, "attributes")
 
@@ -2523,7 +2560,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.AttributeValue]]("Seq[io.apibuilder.api.v0.models.AttributeValue]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2532,11 +2569,12 @@ import io.circe.syntax._
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2547,13 +2585,14 @@ import io.circe.syntax._
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
         val (payload, formPayload) = (Some(attributeValueForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2565,11 +2604,12 @@ import io.circe.syntax._
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -2581,13 +2621,14 @@ import io.circe.syntax._
     object PasswordResetRequests extends PasswordResetRequests[F] {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("password_reset_requests")
 
         val (payload, formPayload) = (Some(passwordResetRequest), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -2598,13 +2639,14 @@ import io.circe.syntax._
     object PasswordResets extends PasswordResets[F] {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val urlPath = Seq("password_resets")
 
         val (payload, formPayload) = (Some(passwordReset), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.PasswordResetSuccess]("io.apibuilder.api.v0.models.PasswordResetSuccess", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2620,7 +2662,8 @@ import io.circe.syntax._
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val urlPath = Seq("subscriptions")
 
@@ -2633,7 +2676,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Subscription]]("Seq[io.apibuilder.api.v0.models.Subscription]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2641,11 +2684,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2654,13 +2698,14 @@ import io.circe.syntax._
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions")
 
         val (payload, formPayload) = (Some(subscriptionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -2669,11 +2714,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2686,7 +2732,8 @@ import io.circe.syntax._
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Token]] = {
         val urlPath = Seq("tokens", "users", userGuid.toString)
 
@@ -2696,7 +2743,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Token]]("Seq[io.apibuilder.api.v0.models.Token]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2704,11 +2751,12 @@ import io.circe.syntax._
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.CleartextToken] = {
         val urlPath = Seq("tokens", guid.toString, "cleartext")
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.CleartextToken]("io.apibuilder.api.v0.models.CleartextToken", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2717,13 +2765,14 @@ import io.circe.syntax._
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Token] = {
         val urlPath = Seq("tokens")
 
         val (payload, formPayload) = (Some(tokenForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Token]("io.apibuilder.api.v0.models.Token", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -2732,11 +2781,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("tokens", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2748,7 +2798,8 @@ import io.circe.syntax._
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.User]] = {
         val urlPath = Seq("users")
 
@@ -2758,7 +2809,7 @@ import io.circe.syntax._
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.User]]("Seq[io.apibuilder.api.v0.models.User]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2766,11 +2817,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2780,7 +2832,8 @@ import io.circe.syntax._
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", "authenticate")
 
@@ -2790,7 +2843,7 @@ import io.circe.syntax._
           "password" -> password
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2799,13 +2852,14 @@ import io.circe.syntax._
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users")
 
         val (payload, formPayload) = (Some(userForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2815,13 +2869,14 @@ import io.circe.syntax._
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
         val (payload, formPayload) = (Some(userUpdateForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2832,13 +2887,14 @@ import io.circe.syntax._
     object Validations extends Validations[F] {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Validation] = {
         val urlPath = Seq("validations")
 
         val (payload, formPayload) = (Some(value), None)
 
-        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Validation]("io.apibuilder.api.v0.models.Validation", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2851,7 +2907,8 @@ import io.circe.syntax._
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Version]] = {
         val urlPath = Seq(orgKey, applicationKey)
 
@@ -2860,7 +2917,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Version]]("Seq[io.apibuilder.api.v0.models.Version]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2870,11 +2927,12 @@ import io.circe.syntax._
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2885,13 +2943,14 @@ import io.circe.syntax._
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2903,13 +2962,14 @@ import io.circe.syntax._
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -2920,11 +2980,12 @@ import io.circe.syntax._
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -2939,7 +3000,8 @@ import io.circe.syntax._
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val urlPath = Seq("watches")
 
@@ -2952,7 +3014,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Watch]]("Seq[io.apibuilder.api.v0.models.Watch]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2960,11 +3022,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -2975,7 +3038,8 @@ import io.circe.syntax._
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Boolean] = {
         val urlPath = Seq("watches", "check")
 
@@ -2985,7 +3049,7 @@ import io.circe.syntax._
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Boolean]("Boolean", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -2993,13 +3057,14 @@ import io.circe.syntax._
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches")
 
         val (payload, formPayload) = (Some(watchForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -3008,11 +3073,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -3037,7 +3103,8 @@ import io.circe.syntax._
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     )(handler: org.http4s.Response[F] => F[U]
     )(implicit encoder: io.circe.Encoder[T]): F[U] = {
       import org.http4s.QueryParamEncoder._
@@ -3056,9 +3123,7 @@ import io.circe.syntax._
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request[F](method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request[F](method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -3146,7 +3211,8 @@ import io.circe.syntax._
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -3155,7 +3221,8 @@ import io.circe.syntax._
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3165,7 +3232,8 @@ import io.circe.syntax._
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -3174,7 +3242,8 @@ import io.circe.syntax._
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -3184,7 +3253,8 @@ import io.circe.syntax._
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
   }
 
@@ -3202,7 +3272,8 @@ import io.circe.syntax._
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -3210,7 +3281,8 @@ import io.circe.syntax._
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3218,7 +3290,8 @@ import io.circe.syntax._
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -3227,7 +3300,8 @@ import io.circe.syntax._
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3243,7 +3317,8 @@ import io.circe.syntax._
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -3261,7 +3336,8 @@ import io.circe.syntax._
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Code]
   }
 
@@ -3272,7 +3348,8 @@ import io.circe.syntax._
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -3281,7 +3358,8 @@ import io.circe.syntax._
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3291,7 +3369,8 @@ import io.circe.syntax._
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3308,17 +3387,20 @@ import io.circe.syntax._
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -3326,7 +3408,8 @@ import io.circe.syntax._
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3350,22 +3433,26 @@ import io.circe.syntax._
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks[F[_]] {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Map[String, String]]
   }
 
@@ -3379,12 +3466,14 @@ import io.circe.syntax._
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Item]
   }
 
@@ -3402,7 +3491,8 @@ import io.circe.syntax._
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -3412,7 +3502,8 @@ import io.circe.syntax._
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -3421,7 +3512,8 @@ import io.circe.syntax._
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -3430,7 +3522,8 @@ import io.circe.syntax._
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3448,17 +3541,20 @@ import io.circe.syntax._
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3484,7 +3580,8 @@ import io.circe.syntax._
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -3492,7 +3589,8 @@ import io.circe.syntax._
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3500,7 +3598,8 @@ import io.circe.syntax._
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3509,7 +3608,8 @@ import io.circe.syntax._
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -3517,7 +3617,8 @@ import io.circe.syntax._
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -3533,7 +3634,8 @@ import io.circe.syntax._
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -3542,7 +3644,8 @@ import io.circe.syntax._
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3552,7 +3655,8 @@ import io.circe.syntax._
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -3562,7 +3666,8 @@ import io.circe.syntax._
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3573,7 +3678,8 @@ import io.circe.syntax._
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3585,7 +3691,8 @@ import io.circe.syntax._
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -3607,7 +3714,8 @@ import io.circe.syntax._
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -3615,7 +3723,8 @@ import io.circe.syntax._
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -3623,12 +3732,14 @@ import io.circe.syntax._
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3642,7 +3753,8 @@ import io.circe.syntax._
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -3650,7 +3762,8 @@ import io.circe.syntax._
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -3658,12 +3771,14 @@ import io.circe.syntax._
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3680,7 +3795,8 @@ import io.circe.syntax._
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -3688,7 +3804,8 @@ import io.circe.syntax._
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3699,7 +3816,8 @@ import io.circe.syntax._
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3707,7 +3825,8 @@ import io.circe.syntax._
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -3716,14 +3835,16 @@ import io.circe.syntax._
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations[F[_]] {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -3741,7 +3862,8 @@ import io.circe.syntax._
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -3754,7 +3876,8 @@ import io.circe.syntax._
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3764,7 +3887,8 @@ import io.circe.syntax._
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3775,7 +3899,8 @@ import io.circe.syntax._
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -3785,7 +3910,8 @@ import io.circe.syntax._
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -3807,7 +3933,8 @@ import io.circe.syntax._
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -3815,7 +3942,8 @@ import io.circe.syntax._
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -3828,7 +3956,8 @@ import io.circe.syntax._
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Boolean]
 
     /**
@@ -3836,12 +3965,14 @@ import io.circe.syntax._
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
diff --git a/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0ClientOnly.scala.txt b/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0ClientOnly.scala.txt
index 9c96ea857..80cf9cef6 100644
--- a/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0ClientOnly.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0ClientOnly.scala.txt
@@ -81,7 +81,8 @@ import io.circe.syntax._
         hasVersion: _root_.scala.Option[Boolean] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Application]] = {
         val urlPath = Seq(orgKey)
 
@@ -94,7 +95,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Application]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Application]]("Seq[io.apibuilder.api.v0.models.Application]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -103,13 +104,14 @@ import io.circe.syntax._
       override def post(
         orgKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -120,13 +122,14 @@ import io.circe.syntax._
         orgKey: String,
         applicationKey: String,
         applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey)
 
         val (payload, formPayload) = (Some(applicationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.ApplicationForm, io.apibuilder.api.v0.models.Application]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -136,11 +139,12 @@ import io.circe.syntax._
       override def deleteByApplicationKey(
         orgKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq(orgKey, applicationKey)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -150,13 +154,14 @@ import io.circe.syntax._
         orgKey: String,
         applicationKey: String,
         moveForm: io.apibuilder.api.v0.models.MoveForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Application] = {
         val urlPath = Seq(orgKey, applicationKey, "move")
 
         val (payload, formPayload) = (Some(moveForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.MoveForm, io.apibuilder.api.v0.models.Application]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Application]("io.apibuilder.api.v0.models.Application", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -170,7 +175,8 @@ import io.circe.syntax._
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Attribute]] = {
         val urlPath = Seq("attributes")
 
@@ -181,7 +187,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Attribute]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Attribute]]("Seq[io.apibuilder.api.v0.models.Attribute]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -189,11 +195,12 @@ import io.circe.syntax._
 
       override def getByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Attribute]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -202,13 +209,14 @@ import io.circe.syntax._
 
       override def post(
         attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Attribute] = {
         val urlPath = Seq("attributes")
 
         val (payload, formPayload) = (Some(attributeForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeForm, io.apibuilder.api.v0.models.Attribute]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Attribute]("io.apibuilder.api.v0.models.Attribute", r)
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
@@ -218,11 +226,12 @@ import io.circe.syntax._
 
       override def deleteByName(
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -237,7 +246,8 @@ import io.circe.syntax._
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Change]] = {
         val urlPath = Seq("changes")
 
@@ -248,7 +258,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Change]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Change]]("Seq[io.apibuilder.api.v0.models.Change]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -261,11 +271,12 @@ import io.circe.syntax._
         applicationKey: String,
         version: String,
         generatorKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Code] = {
         val urlPath = Seq(orgKey, applicationKey, version, generatorKey)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Code]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Code]("io.apibuilder.api.v0.models.Code", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
@@ -278,13 +289,14 @@ import io.circe.syntax._
       override def post(
         orgKey: String,
         domain: io.apibuilder.api.v0.models.Domain,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Domain] = {
         val urlPath = Seq("domains", orgKey)
 
         val (payload, formPayload) = (Some(domain), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.Domain, io.apibuilder.api.v0.models.Domain]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Domain]("io.apibuilder.api.v0.models.Domain", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -294,11 +306,12 @@ import io.circe.syntax._
       override def deleteByName(
         orgKey: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("domains", orgKey, name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -308,13 +321,14 @@ import io.circe.syntax._
     object EmailVerificationConfirmationForms extends EmailVerificationConfirmationForms[F] {
       override def post(
         emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("email_verification_confirmations")
 
         val (payload, formPayload) = (Some(emailVerificationConfirmationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.EmailVerificationConfirmationForm, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -329,7 +343,8 @@ import io.circe.syntax._
         generatorKey: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]] = {
         val urlPath = Seq("generator_services")
 
@@ -341,7 +356,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.GeneratorService]]("Seq[io.apibuilder.api.v0.models.GeneratorService]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -349,11 +364,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -362,13 +378,14 @@ import io.circe.syntax._
 
       override def post(
         generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorService] = {
         val urlPath = Seq("generator_services")
 
         val (payload, formPayload) = (Some(generatorServiceForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.GeneratorServiceForm, io.apibuilder.api.v0.models.GeneratorService]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorService]("io.apibuilder.api.v0.models.GeneratorService", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -377,11 +394,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("generator_services", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 403 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -399,7 +417,8 @@ import io.circe.syntax._
         key: _root_.scala.Option[String] = None,
         limit: Long = 100L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = {
         val urlPath = Seq("generators")
 
@@ -413,7 +432,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.GeneratorWithService]]("Seq[io.apibuilder.api.v0.models.GeneratorWithService]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -421,11 +440,12 @@ import io.circe.syntax._
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.GeneratorWithService] = {
         val urlPath = Seq("generators", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.GeneratorWithService]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.GeneratorWithService]("io.apibuilder.api.v0.models.GeneratorWithService", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -435,22 +455,24 @@ import io.circe.syntax._
 
     object Healthchecks extends Healthchecks[F] {
       override def getHealthcheck(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.generator.v0.models.Healthcheck] = {
         val urlPath = Seq("_internal_", "healthcheck")
 
-        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.generator.v0.models.Healthcheck]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.generator.v0.models.Healthcheck]("io.apibuilder.generator.v0.models.Healthcheck", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
       }
 
       override def getMigrate(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Map[String, String]] = {
         val urlPath = Seq("_internal_", "migrate")
 
-        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Map[String, String]]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Map[String, String]]("Map[String, String]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -462,7 +484,8 @@ import io.circe.syntax._
         q: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Item]] = {
         val urlPath = Seq("items")
 
@@ -472,7 +495,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Item]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Item]]("Seq[io.apibuilder.api.v0.models.Item]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -480,11 +503,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Item] = {
         val urlPath = Seq("items", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Item]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Item]("io.apibuilder.api.v0.models.Item", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -500,7 +524,8 @@ import io.circe.syntax._
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = {
         val urlPath = Seq("membership_requests")
 
@@ -513,7 +538,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.MembershipRequest]]("Seq[io.apibuilder.api.v0.models.MembershipRequest]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -523,7 +548,8 @@ import io.circe.syntax._
         orgGuid: _root_.java.util.UUID,
         userGuid: _root_.java.util.UUID,
         role: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.MembershipRequest] = {
         val urlPath = Seq("membership_requests")
 
@@ -534,7 +560,7 @@ import io.circe.syntax._
           "role" -> role
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.MembershipRequest]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.MembershipRequest]("io.apibuilder.api.v0.models.MembershipRequest", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -543,11 +569,12 @@ import io.circe.syntax._
 
       override def postAcceptByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "accept")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -556,11 +583,12 @@ import io.circe.syntax._
 
       override def postDeclineByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("membership_requests", guid.toString, "decline")
 
-        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("POST", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -576,7 +604,8 @@ import io.circe.syntax._
         role: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Membership]] = {
         val urlPath = Seq("memberships")
 
@@ -589,7 +618,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Membership]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Membership]]("Seq[io.apibuilder.api.v0.models.Membership]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -597,11 +626,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Membership] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Membership]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Membership]("io.apibuilder.api.v0.models.Membership", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -610,11 +640,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("memberships", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -630,7 +661,8 @@ import io.circe.syntax._
         namespace: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Organization]] = {
         val urlPath = Seq("organizations")
 
@@ -644,7 +676,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Organization]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Organization]]("Seq[io.apibuilder.api.v0.models.Organization]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -652,11 +684,12 @@ import io.circe.syntax._
 
       override def getByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Organization]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -665,13 +698,14 @@ import io.circe.syntax._
 
       override def post(
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations")
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -681,13 +715,14 @@ import io.circe.syntax._
       override def putByKey(
         key: String,
         organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Organization] = {
         val urlPath = Seq("organizations", key)
 
         val (payload, formPayload) = (Some(organizationForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.OrganizationForm, io.apibuilder.api.v0.models.Organization]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Organization]("io.apibuilder.api.v0.models.Organization", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -696,11 +731,12 @@ import io.circe.syntax._
 
       override def deleteByKey(
         key: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("organizations", key)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -711,7 +747,8 @@ import io.circe.syntax._
         name: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]] = {
         val urlPath = Seq("organizations", key, "attributes")
 
@@ -721,7 +758,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.AttributeValue]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.AttributeValue]]("Seq[io.apibuilder.api.v0.models.AttributeValue]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -730,11 +767,12 @@ import io.circe.syntax._
       override def getAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.AttributeValue]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -745,13 +783,14 @@ import io.circe.syntax._
         key: String,
         name: String,
         attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.AttributeValue] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
         val (payload, formPayload) = (Some(attributeValueForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.AttributeValueForm, io.apibuilder.api.v0.models.AttributeValue]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.AttributeValue]("io.apibuilder.api.v0.models.AttributeValue", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -763,11 +802,12 @@ import io.circe.syntax._
       override def deleteAttributesByKeyAndName(
         key: String,
         name: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("organizations", key, "attributes", name)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 401 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
@@ -779,13 +819,14 @@ import io.circe.syntax._
     object PasswordResetRequests extends PasswordResetRequests[F] {
       override def post(
         passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("password_reset_requests")
 
         val (payload, formPayload) = (Some(passwordResetRequest), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordResetRequest, Unit]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204, 409"))
@@ -796,13 +837,14 @@ import io.circe.syntax._
     object PasswordResets extends PasswordResets[F] {
       override def post(
         passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.PasswordResetSuccess] = {
         val urlPath = Seq("password_resets")
 
         val (payload, formPayload) = (Some(passwordReset), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.PasswordReset, io.apibuilder.api.v0.models.PasswordResetSuccess]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.PasswordResetSuccess]("io.apibuilder.api.v0.models.PasswordResetSuccess", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -818,7 +860,8 @@ import io.circe.syntax._
         publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Subscription]] = {
         val urlPath = Seq("subscriptions")
 
@@ -831,7 +874,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Subscription]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Subscription]]("Seq[io.apibuilder.api.v0.models.Subscription]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -839,11 +882,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Subscription]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -852,13 +896,14 @@ import io.circe.syntax._
 
       override def post(
         subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Subscription] = {
         val urlPath = Seq("subscriptions")
 
         val (payload, formPayload) = (Some(subscriptionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.SubscriptionForm, io.apibuilder.api.v0.models.Subscription]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Subscription]("io.apibuilder.api.v0.models.Subscription", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -867,11 +912,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("subscriptions", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -884,7 +930,8 @@ import io.circe.syntax._
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Token]] = {
         val urlPath = Seq("tokens", "users", userGuid.toString)
 
@@ -894,7 +941,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Token]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Token]]("Seq[io.apibuilder.api.v0.models.Token]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -902,11 +949,12 @@ import io.circe.syntax._
 
       override def getCleartextByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.CleartextToken] = {
         val urlPath = Seq("tokens", guid.toString, "cleartext")
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.CleartextToken]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.CleartextToken]("io.apibuilder.api.v0.models.CleartextToken", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -915,13 +963,14 @@ import io.circe.syntax._
 
       override def post(
         tokenForm: io.apibuilder.api.v0.models.TokenForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Token] = {
         val urlPath = Seq("tokens")
 
         val (payload, formPayload) = (Some(tokenForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.TokenForm, io.apibuilder.api.v0.models.Token]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Token]("io.apibuilder.api.v0.models.Token", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -930,11 +979,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("tokens", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -946,7 +996,8 @@ import io.circe.syntax._
         guid: _root_.scala.Option[_root_.java.util.UUID] = None,
         email: _root_.scala.Option[String] = None,
         token: _root_.scala.Option[String] = None,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.User]] = {
         val urlPath = Seq("users")
 
@@ -956,7 +1007,7 @@ import io.circe.syntax._
           token.map("token" -> _)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.User]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.User]]("Seq[io.apibuilder.api.v0.models.User]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -964,11 +1015,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -978,7 +1030,8 @@ import io.circe.syntax._
       override def postAuthenticate(
         email: String,
         password: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", "authenticate")
 
@@ -988,7 +1041,7 @@ import io.circe.syntax._
           "password" -> password
         ))
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -997,13 +1050,14 @@ import io.circe.syntax._
 
       override def post(
         userForm: io.apibuilder.api.v0.models.UserForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users")
 
         val (payload, formPayload) = (Some(userForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserForm, io.apibuilder.api.v0.models.User]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1013,13 +1067,14 @@ import io.circe.syntax._
       override def putByGuid(
         guid: _root_.java.util.UUID,
         userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.User] = {
         val urlPath = Seq("users", guid.toString)
 
         val (payload, formPayload) = (Some(userUpdateForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.UserUpdateForm, io.apibuilder.api.v0.models.User]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.User]("io.apibuilder.api.v0.models.User", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1030,13 +1085,14 @@ import io.circe.syntax._
     object Validations extends Validations[F] {
       override def post(
         value: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Validation] = {
         val urlPath = Seq("validations")
 
         val (payload, formPayload) = (Some(value), None)
 
-        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[String, io.apibuilder.api.v0.models.Validation]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Validation]("io.apibuilder.api.v0.models.Validation", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1049,7 +1105,8 @@ import io.circe.syntax._
         applicationKey: String,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Version]] = {
         val urlPath = Seq(orgKey, applicationKey)
 
@@ -1058,7 +1115,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Version]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Version]]("Seq[io.apibuilder.api.v0.models.Version]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1068,11 +1125,12 @@ import io.circe.syntax._
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Version]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -1083,13 +1141,14 @@ import io.circe.syntax._
         orgKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1101,13 +1160,14 @@ import io.circe.syntax._
         applicationKey: String,
         version: String,
         versionForm: io.apibuilder.api.v0.models.VersionForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Version] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
         val (payload, formPayload) = (Some(versionForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.VersionForm, io.apibuilder.api.v0.models.Version]("PUT", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Version]("io.apibuilder.api.v0.models.Version", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 409"))
@@ -1118,11 +1178,12 @@ import io.circe.syntax._
         orgKey: String,
         applicationKey: String,
         version: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq(orgKey, applicationKey, version)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1137,7 +1198,8 @@ import io.circe.syntax._
         applicationKey: _root_.scala.Option[String] = None,
         limit: Long = 25L,
         offset: Long = 0L,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Seq[io.apibuilder.api.v0.models.Watch]] = {
         val urlPath = Seq("watches")
 
@@ -1150,7 +1212,7 @@ import io.circe.syntax._
           Some("offset" -> offset.toString)
         ).flatten
 
-        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Seq[io.apibuilder.api.v0.models.Watch]]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Watch]]("Seq[io.apibuilder.api.v0.models.Watch]", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1158,11 +1220,12 @@ import io.circe.syntax._
 
       override def getByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, io.apibuilder.api.v0.models.Watch]("GET", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 404 => Sync[F].raiseError(new io.apibuilder.api.v0.errors.UnitResponse(r.status.code))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200, 404"))
@@ -1173,7 +1236,8 @@ import io.circe.syntax._
         userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
         organizationKey: String,
         applicationKey: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Boolean] = {
         val urlPath = Seq("watches", "check")
 
@@ -1183,7 +1247,7 @@ import io.circe.syntax._
           Some("application_key" -> applicationKey)
         ).flatten
 
-        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Boolean]("GET", path = urlPath, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Boolean]("Boolean", r)
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -1191,13 +1255,14 @@ import io.circe.syntax._
 
       override def post(
         watchForm: io.apibuilder.api.v0.models.WatchForm,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.apibuilder.api.v0.models.Watch] = {
         val urlPath = Seq("watches")
 
         val (payload, formPayload) = (Some(watchForm), None)
 
-        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders) {
+        _executeRequest[io.apibuilder.api.v0.models.WatchForm, io.apibuilder.api.v0.models.Watch]("POST", path = urlPath, body = payload, formBody = formPayload, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 201 => _root_.io.apibuilder.api.v0.Client.parseJson[F, io.apibuilder.api.v0.models.Watch]("io.apibuilder.api.v0.models.Watch", r)
           case r if r.status.code == 409 => _root_.io.apibuilder.api.v0.Client.parseJson[F, Seq[io.apibuilder.api.v0.models.Error]]("Seq[io.apibuilder.api.v0.models.Error]", r).flatMap(body => Sync[F].raiseError(new io.apibuilder.api.v0.errors.ErrorsResponse(r.headers, r.status.code, None, body)))
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 201, 409"))
@@ -1206,11 +1271,12 @@ import io.circe.syntax._
 
       override def deleteByGuid(
         guid: _root_.java.util.UUID,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[Unit] = {
         val urlPath = Seq("watches", guid.toString)
 
-        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders) {
+        _executeRequest[Unit, Unit]("DELETE", path = urlPath, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 204 => Sync[F].pure(())
           case r => Sync[F].raiseError(new io.apibuilder.api.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 204"))
         }
@@ -1235,7 +1301,8 @@ import io.circe.syntax._
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     )(handler: org.http4s.Response[F] => F[U]
     )(implicit encoder: io.circe.Encoder[T]): F[U] = {
       import org.http4s.QueryParamEncoder._
@@ -1254,9 +1321,7 @@ import io.circe.syntax._
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request[F](method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request[F](method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -1344,7 +1409,8 @@ import io.circe.syntax._
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Application]]
 
     /**
@@ -1353,7 +1419,8 @@ import io.circe.syntax._
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -1363,7 +1430,8 @@ import io.circe.syntax._
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
 
     /**
@@ -1372,7 +1440,8 @@ import io.circe.syntax._
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -1382,7 +1451,8 @@ import io.circe.syntax._
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application]
   }
 
@@ -1400,7 +1470,8 @@ import io.circe.syntax._
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Attribute]]
 
     /**
@@ -1408,7 +1479,8 @@ import io.circe.syntax._
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -1416,7 +1488,8 @@ import io.circe.syntax._
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute]
 
     /**
@@ -1425,7 +1498,8 @@ import io.circe.syntax._
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1441,7 +1515,8 @@ import io.circe.syntax._
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Change]]
   }
 
@@ -1459,7 +1534,8 @@ import io.circe.syntax._
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Code]
   }
 
@@ -1470,7 +1546,8 @@ import io.circe.syntax._
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Domain]
 
     /**
@@ -1479,7 +1556,8 @@ import io.circe.syntax._
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1489,7 +1567,8 @@ import io.circe.syntax._
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1506,17 +1585,20 @@ import io.circe.syntax._
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService]
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService]
 
     /**
@@ -1524,7 +1606,8 @@ import io.circe.syntax._
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1548,22 +1631,26 @@ import io.circe.syntax._
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]]
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorWithService]
   }
 
   trait Healthchecks[F[_]] {
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.generator.v0.models.Healthcheck]
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Map[String, String]]
   }
 
@@ -1577,12 +1664,14 @@ import io.circe.syntax._
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Item]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Item]
   }
 
@@ -1600,7 +1689,8 @@ import io.circe.syntax._
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]]
 
     /**
@@ -1610,7 +1700,8 @@ import io.circe.syntax._
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.MembershipRequest]
 
     /**
@@ -1619,7 +1710,8 @@ import io.circe.syntax._
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -1628,7 +1720,8 @@ import io.circe.syntax._
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1646,17 +1739,20 @@ import io.circe.syntax._
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Membership]]
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Membership]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1682,7 +1778,8 @@ import io.circe.syntax._
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Organization]]
 
     /**
@@ -1690,7 +1787,8 @@ import io.circe.syntax._
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1698,7 +1796,8 @@ import io.circe.syntax._
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1707,7 +1806,8 @@ import io.circe.syntax._
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization]
 
     /**
@@ -1715,7 +1815,8 @@ import io.circe.syntax._
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
 
     /**
@@ -1731,7 +1832,8 @@ import io.circe.syntax._
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]]
 
     /**
@@ -1740,7 +1842,8 @@ import io.circe.syntax._
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -1750,7 +1853,8 @@ import io.circe.syntax._
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue]
 
     /**
@@ -1760,7 +1864,8 @@ import io.circe.syntax._
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1771,7 +1876,8 @@ import io.circe.syntax._
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1783,7 +1889,8 @@ import io.circe.syntax._
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.PasswordResetSuccess]
   }
 
@@ -1805,7 +1912,8 @@ import io.circe.syntax._
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Subscription]]
 
     /**
@@ -1813,7 +1921,8 @@ import io.circe.syntax._
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription]
 
     /**
@@ -1821,12 +1930,14 @@ import io.circe.syntax._
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1840,7 +1951,8 @@ import io.circe.syntax._
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Token]]
 
     /**
@@ -1848,7 +1960,8 @@ import io.circe.syntax._
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.CleartextToken]
 
     /**
@@ -1856,12 +1969,14 @@ import io.circe.syntax._
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Token]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -1878,7 +1993,8 @@ import io.circe.syntax._
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.User]]
 
     /**
@@ -1886,7 +2002,8 @@ import io.circe.syntax._
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1897,7 +2014,8 @@ import io.circe.syntax._
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1905,7 +2023,8 @@ import io.circe.syntax._
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
 
     /**
@@ -1914,14 +2033,16 @@ import io.circe.syntax._
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User]
   }
 
   trait Validations[F[_]] {
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Validation]
   }
 
@@ -1939,7 +2060,8 @@ import io.circe.syntax._
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Version]]
 
     /**
@@ -1952,7 +2074,8 @@ import io.circe.syntax._
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1962,7 +2085,8 @@ import io.circe.syntax._
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1973,7 +2097,8 @@ import io.circe.syntax._
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version]
 
     /**
@@ -1983,7 +2108,8 @@ import io.circe.syntax._
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
@@ -2005,7 +2131,8 @@ import io.circe.syntax._
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Watch]]
 
     /**
@@ -2013,7 +2140,8 @@ import io.circe.syntax._
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch]
 
     /**
@@ -2026,7 +2154,8 @@ import io.circe.syntax._
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Boolean]
 
     /**
@@ -2034,12 +2163,14 @@ import io.circe.syntax._
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch]
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit]
   }
 
diff --git a/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0MockClient.scala.txt b/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0MockClient.scala.txt
index 44b1670df..50cbdb262 100644
--- a/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0MockClient.scala.txt
+++ b/lib/src/test/resources/http4s/apidoc-api/020_instant/BryzekApidocApiV0MockClient.scala.txt
@@ -54,7 +54,8 @@ package io.apibuilder.api.v0.mock {
       hasVersion: _root_.scala.Option[Boolean] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Application]] = cats.Applicative[F].pure {
       Nil
     }
@@ -65,7 +66,8 @@ package io.apibuilder.api.v0.mock {
     def post(
       orgKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -77,7 +79,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       applicationForm: io.apibuilder.api.v0.models.ApplicationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -88,7 +91,8 @@ package io.apibuilder.api.v0.mock {
     def deleteByApplicationKey(
       orgKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -100,7 +104,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       moveForm: io.apibuilder.api.v0.models.MoveForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Application] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeApplication()
     }
@@ -122,7 +127,8 @@ package io.apibuilder.api.v0.mock {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Attribute]] = cats.Applicative[F].pure {
       Nil
     }
@@ -132,7 +138,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeAttribute()
     }
@@ -142,7 +149,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       attributeForm: io.apibuilder.api.v0.models.AttributeForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Attribute] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeAttribute()
     }
@@ -153,7 +161,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByName(
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -173,7 +182,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Change]] = cats.Applicative[F].pure {
       Nil
     }
@@ -195,7 +205,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       version: String,
       generatorKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Code] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeCode()
     }
@@ -205,13 +216,15 @@ package io.apibuilder.api.v0.mock {
   class MockHealthchecks[F[_]: cats.Applicative] extends io.apibuilder.api.v0.Healthchecks[F] {
 
     def getHealthcheck(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.generator.v0.models.Healthcheck] = cats.Applicative[F].pure {
       io.apibuilder.generator.v0.mock.Factories.makeHealthcheck()
     }
 
     def getMigrate(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Map[String, String]] = cats.Applicative[F].pure {
       Map()
     }
@@ -226,7 +239,8 @@ package io.apibuilder.api.v0.mock {
     def post(
       orgKey: String,
       domain: io.apibuilder.api.v0.models.Domain,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Domain] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeDomain()
     }
@@ -237,7 +251,8 @@ package io.apibuilder.api.v0.mock {
     def deleteByName(
       orgKey: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -251,7 +266,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       emailVerificationConfirmationForm: io.apibuilder.api.v0.models.EmailVerificationConfirmationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -272,21 +288,24 @@ package io.apibuilder.api.v0.mock {
       generatorKey: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorService]] = cats.Applicative[F].pure {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorService()
     }
 
     def post(
       generatorServiceForm: io.apibuilder.api.v0.models.GeneratorServiceForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorService] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorService()
     }
@@ -296,7 +315,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -324,14 +344,16 @@ package io.apibuilder.api.v0.mock {
       key: _root_.scala.Option[String] = None,
       limit: Long = 100L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.GeneratorWithService]] = cats.Applicative[F].pure {
       Nil
     }
 
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.GeneratorWithService] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeGeneratorWithService()
     }
@@ -349,14 +371,16 @@ package io.apibuilder.api.v0.mock {
       q: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Item]] = cats.Applicative[F].pure {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Item] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeItem()
     }
@@ -378,21 +402,24 @@ package io.apibuilder.api.v0.mock {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Membership]] = cats.Applicative[F].pure {
       Nil
     }
 
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Membership] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeMembership()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -414,7 +441,8 @@ package io.apibuilder.api.v0.mock {
       role: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.MembershipRequest]] = cats.Applicative[F].pure {
       Nil
     }
@@ -426,7 +454,8 @@ package io.apibuilder.api.v0.mock {
       orgGuid: _root_.java.util.UUID,
       userGuid: _root_.java.util.UUID,
       role: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.MembershipRequest] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeMembershipRequest()
     }
@@ -437,7 +466,8 @@ package io.apibuilder.api.v0.mock {
      */
     def postAcceptByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -448,7 +478,8 @@ package io.apibuilder.api.v0.mock {
      */
     def postDeclineByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -478,7 +509,8 @@ package io.apibuilder.api.v0.mock {
       namespace: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Organization]] = cats.Applicative[F].pure {
       Nil
     }
@@ -488,7 +520,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -498,7 +531,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -509,7 +543,8 @@ package io.apibuilder.api.v0.mock {
     def putByKey(
       key: String,
       organizationForm: io.apibuilder.api.v0.models.OrganizationForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Organization] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeOrganization()
     }
@@ -519,7 +554,8 @@ package io.apibuilder.api.v0.mock {
      */
     def deleteByKey(
       key: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -537,7 +573,8 @@ package io.apibuilder.api.v0.mock {
       name: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.AttributeValue]] = cats.Applicative[F].pure {
       Nil
     }
@@ -548,7 +585,8 @@ package io.apibuilder.api.v0.mock {
     def getAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeAttributeValue()
     }
@@ -560,7 +598,8 @@ package io.apibuilder.api.v0.mock {
       key: String,
       name: String,
       attributeValueForm: io.apibuilder.api.v0.models.AttributeValueForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.AttributeValue] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeAttributeValue()
     }
@@ -572,7 +611,8 @@ package io.apibuilder.api.v0.mock {
     def deleteAttributesByKeyAndName(
       key: String,
       name: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -588,7 +628,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       passwordReset: io.apibuilder.api.v0.models.PasswordReset,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.PasswordResetSuccess] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makePasswordResetSuccess()
     }
@@ -603,7 +644,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       passwordResetRequest: io.apibuilder.api.v0.models.PasswordResetRequest,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -629,7 +671,8 @@ package io.apibuilder.api.v0.mock {
       publication: _root_.scala.Option[io.apibuilder.api.v0.models.Publication] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Subscription]] = cats.Applicative[F].pure {
       Nil
     }
@@ -639,7 +682,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeSubscription()
     }
@@ -649,14 +693,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       subscriptionForm: io.apibuilder.api.v0.models.SubscriptionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Subscription] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeSubscription()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -674,7 +720,8 @@ package io.apibuilder.api.v0.mock {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Token]] = cats.Applicative[F].pure {
       Nil
     }
@@ -684,7 +731,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getCleartextByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.CleartextToken] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeCleartextToken()
     }
@@ -694,14 +742,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       tokenForm: io.apibuilder.api.v0.models.TokenForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Token] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeToken()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -722,7 +772,8 @@ package io.apibuilder.api.v0.mock {
       guid: _root_.scala.Option[_root_.java.util.UUID] = None,
       email: _root_.scala.Option[String] = None,
       token: _root_.scala.Option[String] = None,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.User]] = cats.Applicative[F].pure {
       Nil
     }
@@ -732,7 +783,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -745,7 +797,8 @@ package io.apibuilder.api.v0.mock {
     def postAuthenticate(
       email: String,
       password: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -755,7 +808,8 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       userForm: io.apibuilder.api.v0.models.UserForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -766,7 +820,8 @@ package io.apibuilder.api.v0.mock {
     def putByGuid(
       guid: _root_.java.util.UUID,
       userUpdateForm: io.apibuilder.api.v0.models.UserUpdateForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.User] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeUser()
     }
@@ -777,7 +832,8 @@ package io.apibuilder.api.v0.mock {
 
     def post(
       value: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Validation] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeValidation()
     }
@@ -799,7 +855,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Version]] = cats.Applicative[F].pure {
       Nil
     }
@@ -814,7 +871,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -826,7 +884,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -839,7 +898,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: String,
       version: String,
       versionForm: io.apibuilder.api.v0.models.VersionForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Version] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeVersion()
     }
@@ -851,7 +911,8 @@ package io.apibuilder.api.v0.mock {
       orgKey: String,
       applicationKey: String,
       version: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
@@ -877,7 +938,8 @@ package io.apibuilder.api.v0.mock {
       applicationKey: _root_.scala.Option[String] = None,
       limit: Long = 25L,
       offset: Long = 0L,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Seq[io.apibuilder.api.v0.models.Watch]] = cats.Applicative[F].pure {
       Nil
     }
@@ -887,7 +949,8 @@ package io.apibuilder.api.v0.mock {
      */
     def getByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeWatch()
     }
@@ -902,7 +965,8 @@ package io.apibuilder.api.v0.mock {
       userGuid: _root_.scala.Option[_root_.java.util.UUID] = None,
       organizationKey: String,
       applicationKey: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Boolean] = cats.Applicative[F].pure {
       true
     }
@@ -912,14 +976,16 @@ package io.apibuilder.api.v0.mock {
      */
     def post(
       watchForm: io.apibuilder.api.v0.models.WatchForm,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.apibuilder.api.v0.models.Watch] = cats.Applicative[F].pure {
       io.apibuilder.api.v0.mock.Factories.makeWatch()
     }
 
     def deleteByGuid(
       guid: _root_.java.util.UUID,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[Unit] = cats.Applicative[F].pure {
       // unit type
     }
diff --git a/lib/src/test/resources/http4s/date-time/020_instant/ApibuilderTimeTypesV0Client.scala.txt b/lib/src/test/resources/http4s/date-time/020_instant/ApibuilderTimeTypesV0Client.scala.txt
index d70c1a793..038a9c333 100644
--- a/lib/src/test/resources/http4s/date-time/020_instant/ApibuilderTimeTypesV0Client.scala.txt
+++ b/lib/src/test/resources/http4s/date-time/020_instant/ApibuilderTimeTypesV0Client.scala.txt
@@ -196,7 +196,8 @@ import io.circe.syntax._
         queryDate: _root_.java.time.LocalDate,
         queryTime: _root_.java.time.Instant,
         dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.gregor.time.types.v0.models.DateTimeModel] = {
         val urlPath = Seq("date_time_models", pathDate.toString, pathTime.toString)
 
@@ -207,7 +208,7 @@ import io.circe.syntax._
           Some("query_time" -> queryTime.toString)
         ).flatten
 
-        _executeRequest[io.gregor.time.types.v0.models.DateTimeModel, io.gregor.time.types.v0.models.DateTimeModel]("POST", path = urlPath, body = payload, formBody = formPayload, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[io.gregor.time.types.v0.models.DateTimeModel, io.gregor.time.types.v0.models.DateTimeModel]("POST", path = urlPath, body = payload, formBody = formPayload, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.gregor.time.types.v0.Client.parseJson[F, io.gregor.time.types.v0.models.DateTimeModel]("io.gregor.time.types.v0.models.DateTimeModel", r)
           case r => Sync[F].raiseError(new io.gregor.time.types.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -232,7 +233,8 @@ import io.circe.syntax._
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     )(handler: org.http4s.Response[F] => F[U]
     )(implicit encoder: io.circe.Encoder[T]): F[U] = {
       import org.http4s.QueryParamEncoder._
@@ -251,9 +253,7 @@ import io.circe.syntax._
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request[F](method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request[F](method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -307,7 +307,8 @@ import io.circe.syntax._
       queryDate: _root_.java.time.LocalDate,
       queryTime: _root_.java.time.Instant,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.gregor.time.types.v0.models.DateTimeModel]
   }
 
diff --git a/lib/src/test/resources/http4s/date-time/020_joda/ApibuilderTimeTypesV0Client.scala.txt b/lib/src/test/resources/http4s/date-time/020_joda/ApibuilderTimeTypesV0Client.scala.txt
index 1f5f2c373..2e71a475f 100644
--- a/lib/src/test/resources/http4s/date-time/020_joda/ApibuilderTimeTypesV0Client.scala.txt
+++ b/lib/src/test/resources/http4s/date-time/020_joda/ApibuilderTimeTypesV0Client.scala.txt
@@ -196,7 +196,8 @@ import io.circe.syntax._
         queryDate: _root_.org.joda.time.LocalDate,
         queryTime: _root_.org.joda.time.DateTime,
         dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.gregor.time.types.v0.models.DateTimeModel] = {
         val urlPath = Seq("date_time_models", _root_.org.joda.time.format.ISODateTimeFormat.date.print(pathDate), _root_.org.joda.time.format.ISODateTimeFormat.dateTime.print(pathTime))
 
@@ -207,7 +208,7 @@ import io.circe.syntax._
           Some("query_time" -> _root_.org.joda.time.format.ISODateTimeFormat.dateTime.print(queryTime))
         ).flatten
 
-        _executeRequest[io.gregor.time.types.v0.models.DateTimeModel, io.gregor.time.types.v0.models.DateTimeModel]("POST", path = urlPath, body = payload, formBody = formPayload, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[io.gregor.time.types.v0.models.DateTimeModel, io.gregor.time.types.v0.models.DateTimeModel]("POST", path = urlPath, body = payload, formBody = formPayload, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.gregor.time.types.v0.Client.parseJson[F, io.gregor.time.types.v0.models.DateTimeModel]("io.gregor.time.types.v0.models.DateTimeModel", r)
           case r => Sync[F].raiseError(new io.gregor.time.types.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -232,7 +233,8 @@ import io.circe.syntax._
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     )(handler: org.http4s.Response[F] => F[U]
     )(implicit encoder: io.circe.Encoder[T]): F[U] = {
       import org.http4s.QueryParamEncoder._
@@ -251,9 +253,7 @@ import io.circe.syntax._
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request[F](method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request[F](method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -307,7 +307,8 @@ import io.circe.syntax._
       queryDate: _root_.org.joda.time.LocalDate,
       queryTime: _root_.org.joda.time.DateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.gregor.time.types.v0.models.DateTimeModel]
   }
 
diff --git a/lib/src/test/resources/http4s/date-time/020_offsetdatetime/ApibuilderTimeTypesV0Client.scala.txt b/lib/src/test/resources/http4s/date-time/020_offsetdatetime/ApibuilderTimeTypesV0Client.scala.txt
index f17383dc9..7cdf044df 100644
--- a/lib/src/test/resources/http4s/date-time/020_offsetdatetime/ApibuilderTimeTypesV0Client.scala.txt
+++ b/lib/src/test/resources/http4s/date-time/020_offsetdatetime/ApibuilderTimeTypesV0Client.scala.txt
@@ -196,7 +196,8 @@ import io.circe.syntax._
         queryDate: _root_.java.time.LocalDate,
         queryTime: _root_.java.time.OffsetDateTime,
         dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
       ): F[io.gregor.time.types.v0.models.DateTimeModel] = {
         val urlPath = Seq("date_time_models", pathDate.toString, pathTime.toString)
 
@@ -207,7 +208,7 @@ import io.circe.syntax._
           Some("query_time" -> queryTime.toString)
         ).flatten
 
-        _executeRequest[io.gregor.time.types.v0.models.DateTimeModel, io.gregor.time.types.v0.models.DateTimeModel]("POST", path = urlPath, body = payload, formBody = formPayload, queryParameters = queryParameters, requestHeaders = requestHeaders) {
+        _executeRequest[io.gregor.time.types.v0.models.DateTimeModel, io.gregor.time.types.v0.models.DateTimeModel]("POST", path = urlPath, body = payload, formBody = formPayload, queryParameters = queryParameters, requestHeaders = requestHeaders, requestModifier = requestModifier) {
           case r if r.status.code == 200 => _root_.io.gregor.time.types.v0.Client.parseJson[F, io.gregor.time.types.v0.models.DateTimeModel]("io.gregor.time.types.v0.models.DateTimeModel", r)
           case r => Sync[F].raiseError(new io.gregor.time.types.v0.errors.FailedRequest(r.status.code, s"Unsupported response code[${r.status.code}]. Expected: 200"))
         }
@@ -232,7 +233,8 @@ import io.circe.syntax._
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     )(handler: org.http4s.Response[F] => F[U]
     )(implicit encoder: io.circe.Encoder[T]): F[U] = {
       import org.http4s.QueryParamEncoder._
@@ -251,9 +253,7 @@ import io.circe.syntax._
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = org.http4s.Request[F](method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = org.http4s.Request[F](method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
@@ -307,7 +307,8 @@ import io.circe.syntax._
       queryDate: _root_.java.time.LocalDate,
       queryTime: _root_.java.time.OffsetDateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.gregor.time.types.v0.models.DateTimeModel]
   }
 
diff --git a/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-instant.txt b/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-instant.txt
index 8fb06a9ee..c1b10565d 100644
--- a/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-instant.txt
+++ b/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-instant.txt
@@ -16,7 +16,8 @@ package io.gregor.time.types.v0.mock {
       queryDate: _root_.java.time.LocalDate,
       queryTime: _root_.java.time.Instant,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.gregor.time.types.v0.models.DateTimeModel] = cats.Applicative[F].pure {
       io.gregor.time.types.v0.mock.Factories.makeDateTimeModel()
     }
diff --git a/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-joda.txt b/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-joda.txt
index 152bce776..7ad924336 100644
--- a/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-joda.txt
+++ b/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-joda.txt
@@ -16,7 +16,8 @@ package io.gregor.time.types.v0.mock {
       queryDate: _root_.org.joda.time.LocalDate,
       queryTime: _root_.org.joda.time.DateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.gregor.time.types.v0.models.DateTimeModel] = cats.Applicative[F].pure {
       io.gregor.time.types.v0.mock.Factories.makeDateTimeModel()
     }
diff --git a/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-offsetdatetime.txt b/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-offsetdatetime.txt
index 9bd5dad99..c3c71fb5e 100644
--- a/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-offsetdatetime.txt
+++ b/lib/src/test/resources/http4s/mock-client/http4s_020_date-time-offsetdatetime.txt
@@ -16,7 +16,8 @@ package io.gregor.time.types.v0.mock {
       queryDate: _root_.java.time.LocalDate,
       queryTime: _root_.java.time.OffsetDateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: org.http4s.Request[F] => org.http4s.Request[F] = identity
     ): F[io.gregor.time.types.v0.models.DateTimeModel] = cats.Applicative[F].pure {
       io.gregor.time.types.v0.mock.Factories.makeDateTimeModel()
     }
diff --git a/lib/src/test/resources/play2/mock-client/play27_date-time-instant.txt b/lib/src/test/resources/play2/mock-client/play27_date-time-instant.txt
index 2f3f94a50..a78d589f7 100644
--- a/lib/src/test/resources/play2/mock-client/play27_date-time-instant.txt
+++ b/lib/src/test/resources/play2/mock-client/play27_date-time-instant.txt
@@ -18,7 +18,8 @@ package io.gregor.time.types.v0.mock {
       queryDate: _root_.java.time.LocalDate,
       queryTime: _root_.java.time.Instant,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel] = scala.concurrent.Future.successful {
       io.gregor.time.types.v0.mock.Factories.makeDateTimeModel()
     }
diff --git a/lib/src/test/resources/play2/mock-client/play27_date-time-joda.txt b/lib/src/test/resources/play2/mock-client/play27_date-time-joda.txt
index 4c6a09519..7d72c6950 100644
--- a/lib/src/test/resources/play2/mock-client/play27_date-time-joda.txt
+++ b/lib/src/test/resources/play2/mock-client/play27_date-time-joda.txt
@@ -18,7 +18,8 @@ package io.gregor.time.types.v0.mock {
       queryDate: _root_.org.joda.time.LocalDate,
       queryTime: _root_.org.joda.time.DateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel] = scala.concurrent.Future.successful {
       io.gregor.time.types.v0.mock.Factories.makeDateTimeModel()
     }
diff --git a/lib/src/test/resources/play2/mock-client/play27_date-time-offsetdatetime.txt b/lib/src/test/resources/play2/mock-client/play27_date-time-offsetdatetime.txt
index 408928538..d8eefc43d 100644
--- a/lib/src/test/resources/play2/mock-client/play27_date-time-offsetdatetime.txt
+++ b/lib/src/test/resources/play2/mock-client/play27_date-time-offsetdatetime.txt
@@ -18,7 +18,8 @@ package io.gregor.time.types.v0.mock {
       queryDate: _root_.java.time.LocalDate,
       queryTime: _root_.java.time.OffsetDateTime,
       dateTimeModel: io.gregor.time.types.v0.models.DateTimeModel,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.gregor.time.types.v0.models.DateTimeModel] = scala.concurrent.Future.successful {
       io.gregor.time.types.v0.mock.Factories.makeDateTimeModel()
     }
diff --git a/lib/src/test/resources/union-types-discriminator-service-play-24.txt b/lib/src/test/resources/union-types-discriminator-service-play-24.txt
index 709a8d18f..3f75083db 100644
--- a/lib/src/test/resources/union-types-discriminator-service-play-24.txt
+++ b/lib/src/test/resources/union-types-discriminator-service-play-24.txt
@@ -373,9 +373,10 @@ package io.apibuilder.example.union.types.discriminator.v0 {
 
     object Users extends Users {
       override def get(
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.example.union.types.discriminator.v0.models.User]] = {
-        _executeRequest("GET", s"/users", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.example.union.types.discriminator.v0.Client.parseJson("Seq[io.apibuilder.example.union.types.discriminator.v0.models.User]", r, _.validate[Seq[io.apibuilder.example.union.types.discriminator.v0.models.User]])
           case r => throw io.apibuilder.example.union.types.discriminator.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200")
         }
@@ -383,9 +384,10 @@ package io.apibuilder.example.union.types.discriminator.v0 {
 
       override def getById(
         id: String,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.discriminator.v0.models.User] = {
-        _executeRequest("GET", s"/users/${play.utils.UriEncoding.encodePathSegment(id, "UTF-8")}", requestHeaders = requestHeaders).map {
+        _executeRequest("GET", s"/users/${play.utils.UriEncoding.encodePathSegment(id, "UTF-8")}", requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 200 => _root_.io.apibuilder.example.union.types.discriminator.v0.Client.parseJson("io.apibuilder.example.union.types.discriminator.v0.models.User", r, _.validate[io.apibuilder.example.union.types.discriminator.v0.models.User])
           case r if r.status == 404 => throw io.apibuilder.example.union.types.discriminator.v0.errors.UnitResponse(r.status)
           case r => throw io.apibuilder.example.union.types.discriminator.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 200, 404")
@@ -394,11 +396,12 @@ package io.apibuilder.example.union.types.discriminator.v0 {
 
       override def post(
         user: io.apibuilder.example.union.types.discriminator.v0.models.User,
-        requestHeaders: Seq[(String, String)] = Nil
+        requestHeaders: Seq[(String, String)] = Nil,
+        requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
       )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.discriminator.v0.models.User] = {
         val payload = play.api.libs.json.Json.toJson(user)
 
-        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders).map {
+        _executeRequest("POST", s"/users", body = Some(payload), requestHeaders = requestHeaders, requestModifier = requestModifier).map {
           case r if r.status == 201 => _root_.io.apibuilder.example.union.types.discriminator.v0.Client.parseJson("io.apibuilder.example.union.types.discriminator.v0.models.User", r, _.validate[io.apibuilder.example.union.types.discriminator.v0.models.User])
           case r => throw io.apibuilder.example.union.types.discriminator.v0.errors.FailedRequest(r.status, s"Unsupported response code[${r.status}]. Expected: 201")
         }
@@ -438,32 +441,41 @@ package io.apibuilder.example.union.types.discriminator.v0 {
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     ): scala.concurrent.Future[play.api.libs.ws.WSResponse] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(_withJsonContentType(requestHeaders):_*).withQueryString(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          _logRequest("PATCH", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).withHeaders(requestHeaders:_*).withQueryString(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
@@ -515,17 +527,20 @@ package io.apibuilder.example.union.types.discriminator.v0 {
 
   trait Users {
     def get(
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[Seq[io.apibuilder.example.union.types.discriminator.v0.models.User]]
 
     def getById(
       id: String,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.discriminator.v0.models.User]
 
     def post(
       user: io.apibuilder.example.union.types.discriminator.v0.models.User,
-      requestHeaders: Seq[(String, String)] = Nil
+      requestHeaders: Seq[(String, String)] = Nil,
+      requestModifier: play.api.libs.ws.WSRequest => play.api.libs.ws.WSRequest = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[io.apibuilder.example.union.types.discriminator.v0.models.User]
   }
 
diff --git a/scala-generator/src/main/scala/models/Play2ClientGenerator.scala b/scala-generator/src/main/scala/models/Play2ClientGenerator.scala
index 9d06fbac7..98b271cf1 100644
--- a/scala-generator/src/main/scala/models/Play2ClientGenerator.scala
+++ b/scala-generator/src/main/scala/models/Play2ClientGenerator.scala
@@ -10,7 +10,6 @@ import generator.ServiceFileNames
 case class PlayFrameworkVersion(
   name: String,
   config: ScalaClientMethodConfig,
-  requestHolderClass: String,
   authSchemeClass: String,
   supportsHttpPatch: Boolean,
   useSpecificAddMethods: Boolean,
@@ -21,7 +20,6 @@ object Play22ClientGenerator extends CodeGenerator {
   def config(form: InvocationForm) = PlayFrameworkVersion(
     name = "2.2.x",
     config = ScalaClientMethodConfigs.Play22(Namespaces.quote(form.service.namespace), Attributes.PlayDefaultConfig.withAttributes(form.attributes), form.service.baseUrl),
-    requestHolderClass = "play.api.libs.ws.WS.WSRequestHolder",
     authSchemeClass = "com.ning.http.client.Realm.AuthScheme",
     supportsHttpPatch = false,
     useSpecificAddMethods = false,
@@ -37,7 +35,6 @@ object Play23ClientGenerator extends CodeGenerator {
   def config(form: InvocationForm) = PlayFrameworkVersion(
     name = "2.3.x",
     config = ScalaClientMethodConfigs.Play23(Namespaces.quote(form.service.namespace), Attributes.PlayDefaultConfig.withAttributes(form.attributes), form.service.baseUrl),
-    requestHolderClass = "play.api.libs.ws.WSRequestHolder",
     authSchemeClass = "play.api.libs.ws.WSAuthScheme",
     supportsHttpPatch = true,
     useSpecificAddMethods = false,
@@ -53,7 +50,6 @@ object Play24ClientGenerator extends CodeGenerator {
   def config(form: InvocationForm) = PlayFrameworkVersion(
     name = "2.4.x",
     config = ScalaClientMethodConfigs.Play24(Namespaces.quote(form.service.namespace), Attributes.PlayDefaultConfig.withAttributes(form.attributes),form.service.baseUrl),
-    requestHolderClass = "play.api.libs.ws.WSRequest",
     authSchemeClass = "play.api.libs.ws.WSAuthScheme",
     supportsHttpPatch = true,
     useSpecificAddMethods = false,
@@ -69,7 +65,6 @@ object Play25ClientGenerator extends CodeGenerator {
   def config(form: InvocationForm) = PlayFrameworkVersion(
     name = "2.5.x",
     config = ScalaClientMethodConfigs.Play25(Namespaces.quote(form.service.namespace), Attributes.PlayDefaultConfig.withAttributes(form.attributes), form.service.baseUrl),
-    requestHolderClass = "play.api.libs.ws.WSRequest",
     authSchemeClass = "play.api.libs.ws.WSAuthScheme",
     supportsHttpPatch = true,
     useSpecificAddMethods = false,
@@ -85,7 +80,6 @@ object Play26ClientGenerator extends CodeGenerator {
   def config(form: InvocationForm) = PlayFrameworkVersion(
     name = "2.6.x",
     config = ScalaClientMethodConfigs.Play26(Namespaces.quote(form.service.namespace), Attributes.PlayDefaultConfig.withAttributes(form.attributes), form.service.baseUrl),
-    requestHolderClass = "play.api.libs.ws.WSRequest",
     authSchemeClass = "play.api.libs.ws.WSAuthScheme",
     supportsHttpPatch = true,
     useSpecificAddMethods = true,
@@ -101,7 +95,6 @@ object Play26EnvelopeClientGenerator extends CodeGenerator {
   def config(form: InvocationForm) = PlayFrameworkVersion(
     name = "2.6.x",
     config = ScalaClientMethodConfigs.Play26Envelope(Namespaces.quote(form.service.namespace), Attributes.PlayDefaultConfig.withAttributes(form.attributes), form.service.baseUrl),
-    requestHolderClass = "play.api.libs.ws.WSRequest",
     authSchemeClass = "play.api.libs.ws.WSAuthScheme",
     supportsHttpPatch = true,
     useSpecificAddMethods = true,
@@ -117,7 +110,6 @@ object Play27ClientGenerator extends CodeGenerator {
   def config(form: InvocationForm) = PlayFrameworkVersion(
     name = "2.7.x",
     config = ScalaClientMethodConfigs.Play27(Namespaces.quote(form.service.namespace), Attributes.PlayDefaultConfig.withAttributes(form.attributes), form.service.baseUrl),
-    requestHolderClass = "play.api.libs.ws.WSRequest",
     authSchemeClass = "play.api.libs.ws.WSAuthScheme",
     supportsHttpPatch = true,
     useSpecificAddMethods = true,
@@ -172,7 +164,10 @@ case class Play2ClientGenerator(
     }
 
     val patchMethod = version.supportsHttpPatch match {
-      case true => s"""_logRequest("PATCH", _requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*)).patch(body.getOrElse(play.api.libs.json.Json.obj()))"""
+      case true =>
+        s"""|val request = requestModifier(_requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*))
+            |_logRequest("PATCH", request).patch(body.getOrElse(play.api.libs.json.Json.obj()))
+            |""".stripMargin
       case false => s"""sys.error("PATCH method is not supported in Play Framework Version ${version.name}")"""
     }
 
@@ -200,7 +195,7 @@ ${methodGenerator.accessors().indent(4)}
 
 ${methodGenerator.objects().indent(4)}
 
-    def _requestHolder(path: String): ${version.requestHolderClass} = {
+    def _requestHolder(path: String): ${version.config.requestBuilderClass} = {
 ${if (version.config.expectsInjectedWsClient) "" else "      import play.api.Play.current\n"}
       val holder = ${if (version.config.expectsInjectedWsClient) "ws" else "play.api.libs.ws.WS"}.url(baseUrl + path)$headerString
       auth.fold(holder) {
@@ -211,7 +206,7 @@ ${if (version.config.expectsInjectedWsClient) "" else "      import play.api.Pla
       }
     }
 
-    def _logRequest(method: String, req: ${version.requestHolderClass}): ${version.requestHolderClass} = {
+    def _logRequest(method: String, req: ${version.config.requestBuilderClass}): ${version.config.requestBuilderClass} = {
       val queryComponents = for {
         (name, values) <- req.queryString
         value <- values
@@ -228,32 +223,40 @@ ${if (version.config.expectsInjectedWsClient) "" else "      import play.api.Pla
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: ${version.config.requestBuilderClass} => ${version.config.requestBuilderClass} = identity
     ): scala.concurrent.Future[${version.config.responseClass}] = {
       method.toUpperCase match {
         case "GET" => {
-          _logRequest("GET", _requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*)).get()
+          val request = requestModifier(_requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*))
+          _logRequest("GET", request).get()
         }
         case "POST" => {
-          _logRequest("POST", _requestHolder(path).$addHeadersMethod(_withJsonContentType(requestHeaders):_*).$addQueryStringMethod(queryParameters:_*)).post(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).$addHeadersMethod(_withJsonContentType(requestHeaders):_*).$addQueryStringMethod(queryParameters:_*))
+          _logRequest("POST", request).post(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PUT" => {
-          _logRequest("PUT", _requestHolder(path).$addHeadersMethod(_withJsonContentType(requestHeaders):_*).$addQueryStringMethod(queryParameters:_*)).put(body.getOrElse(play.api.libs.json.Json.obj()))
+          val request = requestModifier(_requestHolder(path).$addHeadersMethod(_withJsonContentType(requestHeaders):_*).$addQueryStringMethod(queryParameters:_*))
+          _logRequest("PUT", request).put(body.getOrElse(play.api.libs.json.Json.obj()))
         }
         case "PATCH" => {
-          $patchMethod
+${patchMethod.indent(10)}
         }
         case "DELETE" => {
-          _logRequest("DELETE", _requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*)).delete()
+          val request = requestModifier(_requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*))
+          _logRequest("DELETE", request).delete()
         }
-         case "HEAD" => {
-          _logRequest("HEAD", _requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*)).head()
+        case "HEAD" => {
+          val request = requestModifier(_requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*))
+          _logRequest("HEAD", request).head()
         }
-         case "OPTIONS" => {
-          _logRequest("OPTIONS", _requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*)).options()
+        case "OPTIONS" => {
+          val request = requestModifier(_requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*))
+          _logRequest("OPTIONS", request).options()
         }
         case _ => {
-          _logRequest(method, _requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*))
+          val request = requestModifier(_requestHolder(path).$addHeadersMethod(requestHeaders:_*).$addQueryStringMethod(queryParameters:_*))
+          _logRequest(method, request)
           sys.error("Unsupported method[%s]".format(method))
         }
       }
diff --git a/scala-generator/src/main/scala/models/generator/ScalaClientMethodConfig.scala b/scala-generator/src/main/scala/models/generator/ScalaClientMethodConfig.scala
index bb5ce4087..39b3a8fbd 100644
--- a/scala-generator/src/main/scala/models/generator/ScalaClientMethodConfig.scala
+++ b/scala-generator/src/main/scala/models/generator/ScalaClientMethodConfig.scala
@@ -44,6 +44,11 @@ trait ScalaClientMethodConfig {
     */
   def responseClass: String
 
+  /**
+    * The class name for building the Request object.
+    */
+  def requestBuilderClass: String
+
   /** Whether or not play.api.libs.ws.WS exists as a static object, or if
     * play.api.libs.ws.WSClient is expected to be passed in.
     */
@@ -133,6 +138,7 @@ object ScalaClientMethodConfigs {
 
   case class Play22(namespace: String, attributes: Attributes, baseUrl: Option[String]) extends Play {
     override val responseClass = "play.api.libs.ws.Response"
+    override val requestBuilderClass = "play.api.libs.ws.WS.WSRequestHolder"
     override val requestUriMethod = Some("ahcResponse.getUri")
     override val expectsInjectedWsClient = false
     override val canSerializeUuid = false
@@ -140,6 +146,7 @@ object ScalaClientMethodConfigs {
 
   case class Play23(namespace: String, attributes: Attributes, baseUrl: Option[String]) extends Play {
     override val responseClass = "play.api.libs.ws.WSResponse"
+    override val requestBuilderClass = "play.api.libs.ws.WSRequestHolder"
     override val requestUriMethod: Option[String] = None
     override val expectsInjectedWsClient = false
     override val canSerializeUuid = true
@@ -147,6 +154,7 @@ object ScalaClientMethodConfigs {
 
   case class Play24(namespace: String, attributes: Attributes, baseUrl: Option[String]) extends Play {
     override val responseClass = "play.api.libs.ws.WSResponse"
+    override val requestBuilderClass = "play.api.libs.ws.WSRequest"
     override val requestUriMethod: Option[String] = None
     override val expectsInjectedWsClient = false
     override val canSerializeUuid = true
@@ -154,6 +162,7 @@ object ScalaClientMethodConfigs {
 
   case class Play25(namespace: String, attributes: Attributes, baseUrl: Option[String]) extends Play {
     override val responseClass = "play.api.libs.ws.WSResponse"
+    override val requestBuilderClass = "play.api.libs.ws.WSRequest"
     override val requestUriMethod: Option[String] = None
     override val expectsInjectedWsClient = true
     override val canSerializeUuid = true
@@ -161,6 +170,7 @@ object ScalaClientMethodConfigs {
 
   case class Play26(namespace: String, attributes: Attributes, baseUrl: Option[String]) extends Play {
     override val responseClass = "play.api.libs.ws.WSResponse"
+    override val requestBuilderClass = "play.api.libs.ws.WSRequest"
     override val requestUriMethod: Option[String] = None
     override val expectsInjectedWsClient = true
     override val canSerializeUuid = true
@@ -168,6 +178,7 @@ object ScalaClientMethodConfigs {
 
   case class Play26Envelope(namespace: String, attributes: Attributes, baseUrl: Option[String]) extends Play {
     override val responseClass = "play.api.libs.ws.WSResponse"
+    override val requestBuilderClass = "play.api.libs.ws.WSRequest"
     override val requestUriMethod: Option[String] = None
     override val expectsInjectedWsClient = true
     override val canSerializeUuid = true
@@ -175,6 +186,7 @@ object ScalaClientMethodConfigs {
 
   case class Play27(namespace: String, attributes: Attributes, baseUrl: Option[String]) extends Play {
     override val responseClass = "play.api.libs.ws.WSResponse"
+    override val requestBuilderClass = "play.api.libs.ws.WSRequest"
     override val requestUriMethod: Option[String] = None
     override val expectsInjectedWsClient = true
     override val canSerializeUuid = true
@@ -185,6 +197,7 @@ object ScalaClientMethodConfigs {
     override val responseStatusMethod = "getStatusCode"
     override val responseBodyMethod = """getResponseBody("UTF-8")"""
     override val responseClass = "_root_.com.ning.http.client.Response"
+    override val requestBuilderClass = "_root_.com.ning.http.client.RequestBuilder"
     override val extraClientCtorArgs = Some(",\n  asyncHttpClient: AsyncHttpClient = Client.defaultAsyncHttpClient")
     override val extraClientObjectMethods = Some("""
 private lazy val defaultAsyncHttpClient = {
@@ -239,6 +252,7 @@ private lazy val defaultAsyncHttpClient = {
     override val responseStatusMethod = "status.code"
     override val responseBodyMethod = """body"""
     override val responseClass = "org.http4s.Response"
+    override val requestBuilderClass: String = "org.http4s.Request"
     override def extraClientCtorArgs: Option[String] = Some(",\n  asyncHttpClient: org.http4s.client.Client = Client.defaultAsyncHttpClient")
     override val extraClientObjectMethods = Some("""
 implicit def circeJsonDecoder[A](implicit decoder: io.circe.Decoder[A]) = org.http4s.circe.jsonOf[A]
@@ -258,8 +272,7 @@ private lazy val defaultAsyncHttpClient = PooledHttp1Client()
     def rightType: String
     def monadTransformerInvoke: String
     def asyncFailure: String
-    def requestClass: String = "org.http4s.Request"
-    def requestType:  String = s"$asyncType[$requestClass]"
+    def requestType:  String = s"$asyncType[$requestBuilderClass]"
     def messageClass: String = "org.http4s.Message"
     def httpServiceClass: String = "org.http4s.HttpService"
     def generateDecodeResult(datatypeName: String): String = s"org.http4s.DecodeResult[$datatypeName]"
@@ -278,9 +291,10 @@ private lazy val defaultAsyncHttpClient = PooledHttp1Client()
                                              |  asyncHttpClient.shutdownNow()
                                              |}""".stripMargin)
 
-    def reqAndMaybeAuthAndBody: String = s"""val reqAndMaybeAuthAndBody =
-                                            |  if (formBody.nonEmpty) formBody.fold($asyncSuccessInvoke(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)
-                                            |  else body.fold($asyncSuccessInvoke(reqAndMaybeAuth))(reqAndMaybeAuth.withBody)""".stripMargin
+    def reqAndMaybeAuthAndBody: String = s"""val decoratedRequest = requestModifier(reqAndMaybeAuth)
+                                            |val reqAndMaybeAuthAndBody =
+                                            |  if (formBody.nonEmpty) formBody.fold($asyncSuccessInvoke(decoratedRequest))(decoratedRequest.withBody)
+                                            |  else body.fold($asyncSuccessInvoke(decoratedRequest))(decoratedRequest.withBody)""".stripMargin
 
     def matchersImport: String
     def httpClient: String
@@ -323,7 +337,7 @@ private lazy val defaultAsyncHttpClient = PooledHttp1Client()
     )
     override val asyncSuccess: String = "pure"
     override def asyncFailure: String = "raiseError"
-    override def requestClass: String = s"org.http4s.Request[$asyncType]"
+    override val requestBuilderClass: String = s"org.http4s.Request[$asyncType]"
     override def generateDecodeResult(datatypeName: String): String = s"org.http4s.DecodeResult[$asyncType, $datatypeName]"
     override def messageClass: String = s"org.http4s.Message[$asyncType]"
     override def httpServiceClass: String = s"org.http4s.HttpService[$asyncType]"
@@ -372,8 +386,8 @@ private lazy val defaultAsyncHttpClient = PooledHttp1Client()
     )
     override val asyncSuccess: String = "pure"
     override def asyncFailure: String = "raiseError"
-    override def requestClass: String = s"org.http4s.Request[$asyncType]"
-    override def requestType:  String = requestClass
+    override val requestBuilderClass: String = s"org.http4s.Request[$asyncType]"
+    override val requestType: String = requestBuilderClass
     override def generateDecodeResult(datatypeName: String): String = s"org.http4s.DecodeResult[$asyncType, $datatypeName]"
     override def messageClass: String = s"org.http4s.Message[$asyncType]"
     override def httpServiceClass: String = s"org.http4s.HttpRoutes.of[$asyncType]"
diff --git a/scala-generator/src/main/scala/models/generator/ScalaClientMethodGenerator.scala b/scala-generator/src/main/scala/models/generator/ScalaClientMethodGenerator.scala
index 702724f1b..f3bae0102 100644
--- a/scala-generator/src/main/scala/models/generator/ScalaClientMethodGenerator.scala
+++ b/scala-generator/src/main/scala/models/generator/ScalaClientMethodGenerator.scala
@@ -183,6 +183,8 @@ class ScalaClientMethodGenerator(
         args.append("requestHeaders = (requestHeaders ++ headerParameters)")
       }
 
+      args.append("requestModifier = requestModifier")
+
       val methodCall = code.toList match {
         case Nil => s"""_executeRequest("${op.method}", $path, ${args.mkString(", ")})"""
         case v => s"""${v.mkString("\n\n")}\n\n_executeRequest("${op.method}", $path, ${args.mkString(", ")})"""
@@ -268,11 +270,14 @@ class ScalaClientMethodGenerator(
         }.mkString("\n")
       } + hasOptionResult.getOrElse("") + s"\n$defaultResponse\n"
 
+      val extraArgs = Seq(s"requestModifier: ${config.requestBuilderClass} => ${config.requestBuilderClass} = identity")
+
       new ScalaClientMethod(
         operation = op,
         returnType = s"${config.asyncType}[${withEnvelope(op.resultType, isOption = hasOptionResult.isDefined)}]",
         methodCall = methodCall,
         response = matchResponse,
+        extraArgs = extraArgs,
         implicitArgs = config.implicitArgs,
         responseEnvelopeName = config.responseEnvelopeClassName,
       )
@@ -305,15 +310,16 @@ class ScalaClientMethod(
   returnType: String,
   methodCall: String,
   response: String,
+  extraArgs: Seq[String],
   implicitArgs: Option[String],
   responseEnvelopeName: Option[String],
 ) {
 
-  val name: String = operation.name
+  protected val name: String = operation.name
 
-  val argList: Option[String] = operation.parameters.find(_.name.toLowerCase == "requestheaders") match {
-    case Some(_) => operation.argList()
-    case None => operation.argList(Seq("requestHeaders: Seq[(String, String)] = Nil"))
+  protected val argList: Option[String] = operation.parameters.find(_.name.toLowerCase == "requestheaders") match {
+    case Some(_) => operation.argList(extraArgs)
+    case None => operation.argList(Seq("requestHeaders: Seq[(String, String)] = Nil") ++ extraArgs)
   }
 
   protected[this] val commentString: Option[String] = toOption(
diff --git a/scala-generator/src/main/scala/models/http4s/Http4sClient.scala b/scala-generator/src/main/scala/models/http4s/Http4sClient.scala
index 0364e6b5a..bff15b8f1 100644
--- a/scala-generator/src/main/scala/models/http4s/Http4sClient.scala
+++ b/scala-generator/src/main/scala/models/http4s/Http4sClient.scala
@@ -51,7 +51,8 @@ ${headerString.indent(6)}
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
       body: Option[T] = None,
-      formBody : Option[org.http4s.UrlForm] = None
+      formBody: Option[org.http4s.UrlForm] = None,
+      requestModifier: ${config.requestBuilderClass} => ${config.requestBuilderClass} = identity
     )(handler: ${config.responseClass} => ${config.asyncType}[U]
     )(implicit encoder: io.circe.Encoder[T]): ${config.asyncType}[U] = {
       import org.http4s.QueryParamEncoder._
@@ -70,9 +71,7 @@ ${headerString.indent(6)}
       val queryMap = queryParameters.groupBy(_._1).map { case (k, v) => k -> v.map(_._2) }
       val uri = path.foldLeft(baseUrl){ case (uri, segment) => uri / segment }.setQueryParams(queryMap)
 
-      val request = ${config.requestClass}(method = m,
-                                       uri = uri,
-                                       headers = headers)
+      val request = ${config.requestBuilderClass}(method = m, uri = uri, headers = headers)
 
       val reqAndMaybeAuth = auth.fold(request) {
         case Authorization.Basic(username, passwordOpt) => {
diff --git a/scala-generator/src/main/scala/models/http4s/ScalaClientMethodGenerator.scala b/scala-generator/src/main/scala/models/http4s/ScalaClientMethodGenerator.scala
index 375fe35ee..f7805bbec 100644
--- a/scala-generator/src/main/scala/models/http4s/ScalaClientMethodGenerator.scala
+++ b/scala-generator/src/main/scala/models/http4s/ScalaClientMethodGenerator.scala
@@ -63,6 +63,8 @@ class ScalaClientMethodGenerator (
         args.append("requestHeaders = (requestHeaders ++ headerParameters)")
       }
 
+      args.append("requestModifier = requestModifier")
+
       val reqType = op.body.fold("Unit")(b => b.datatype.name)
 
       val hasOptionResult = featureMigration.hasImplicit404s match {
@@ -165,11 +167,14 @@ class ScalaClientMethodGenerator (
         }.mkString("\n")
       } + hasOptionResult.getOrElse("") + s"\n$defaultResponse\n"
 
+      val extraArgs = Seq(s"requestModifier: ${config.requestBuilderClass} => ${config.requestBuilderClass} = identity")
+
       new ScalaClientMethod(
         operation = op,
         returnType = s"${config.asyncType}[$resType]",
         methodCall = methodCall,
         response = matchResponse,
+        extraArgs = extraArgs,
         implicitArgs = config.implicitArgs,
         typeParam = config.asyncTypeParam()
       )
@@ -220,9 +225,10 @@ class ScalaClientMethod(
   returnType: String,
   methodCall: String,
   response: String,
+  extraArgs: Seq[String],
   implicitArgs: Option[String],
   typeParam: Option[String]
-) extends scala.generator.ScalaClientMethod(operation, returnType, methodCall, response, implicitArgs, responseEnvelopeName = None) {
+) extends scala.generator.ScalaClientMethod(operation, returnType, methodCall, response, extraArgs, implicitArgs, responseEnvelopeName = None) {
   import lib.Text._
 
   override val interface: String = {
diff --git a/scala-generator/src/main/scala/models/http4s/server/Route.scala b/scala-generator/src/main/scala/models/http4s/server/Route.scala
index ce71566c3..cb8c85602 100644
--- a/scala-generator/src/main/scala/models/http4s/server/Route.scala
+++ b/scala-generator/src/main/scala/models/http4s/server/Route.scala
@@ -64,7 +64,7 @@ case class Route(ssd: ScalaService, resource: ScalaResource, op: ScalaOperation,
     )
 
     val params =
-      Seq(Some(s"_req: ${config.requestClass}")) ++
+      Seq(Some(s"_req: ${config.requestBuilderClass}")) ++
       nonHeaderParameters ++
       Seq(op.body.map(body => s"body: => ${config.generateDecodeResult(body.datatype.name)}"))
 
diff --git a/scala-generator/src/main/scala/models/ning/NingClientGenerator.scala b/scala-generator/src/main/scala/models/ning/NingClientGenerator.scala
index 4135e85c6..79d7c6287 100644
--- a/scala-generator/src/main/scala/models/ning/NingClientGenerator.scala
+++ b/scala-generator/src/main/scala/models/ning/NingClientGenerator.scala
@@ -99,8 +99,8 @@ ${methodGenerator.objects().indent(4)}
       }
     }
 
-    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): RequestBuilder = {
-      val builder = new RequestBuilder(method)
+    def _requestBuilder(method: String, path: String, requestHeaders: Seq[(String, String)]): ${config.requestBuilderClass} = {
+      val builder = new ${config.requestBuilderClass}(method)
         .setUrl(baseUrl + path)
 ${headerString.indent(8)}
 
@@ -125,7 +125,8 @@ ${config.realmBuilder("username", """passwordOpt.getOrElse("")""").indent(12)}
       path: String,
       queryParameters: Seq[(String, String)] = Nil,
       requestHeaders: Seq[(String, String)] = Nil,
-      body: Option[play.api.libs.json.JsValue] = None
+      body: Option[play.api.libs.json.JsValue] = None,
+      requestModifier: ${config.requestBuilderClass} => ${config.requestBuilderClass} = identity
     )(implicit ec: scala.concurrent.ExecutionContext): scala.concurrent.Future[${config.ningPackage}.Response] = {
       val allHeaders = body match {
         case None => requestHeaders
@@ -143,7 +144,7 @@ ${config.realmBuilder("username", """passwordOpt.getOrElse("")""").indent(12)}
         request.setBody(serialized)
       }
 
-      val finalRequest = requestWithParamsAndBody.build()
+      val finalRequest = requestModifier(requestWithParamsAndBody).build()
       _logRequest(finalRequest)
 
       val result = scala.concurrent.Promise[${config.ningPackage}.Response]()
@@ -177,7 +178,8 @@ ${PlayScalaClientCommon(config).indent(2)}
 ${methodGenerator.traitsAndErrors().indent(2)}
 
 ${PathSegment.definition.indent(2)}
-}"""
+}
+"""
   }
 
 }