diff --git a/modules/tappxBidAdapter.js b/modules/tappxBidAdapter.js
index d8f6654a567..566795a204b 100644
--- a/modules/tappxBidAdapter.js
+++ b/modules/tappxBidAdapter.js
@@ -8,11 +8,10 @@ import { config } from '../src/config.js';
 const BIDDER_CODE = 'tappx';
 const TTL = 360;
 const CUR = 'USD';
-const TAPPX_BIDDER_VERSION = '0.1.10420';
+const TAPPX_BIDDER_VERSION = '0.1.10514';
 const TYPE_CNN = 'prebidjs';
 const VIDEO_SUPPORT = ['instream'];
 
-var HOST;
 var hostDomain;
 
 export const spec = {
@@ -105,13 +104,31 @@ export const spec = {
 }
 
 function validBasic(bid) {
-  if (
-    (bid.params == null) ||
-    (bid.params.endpoint == null) ||
-    (bid.params.tappxkey == null)) {
+  if (bid.params == null) {
     utils.logWarn(`[TAPPX]: Please review the mandatory Tappx parameters.`);
     return false;
   }
+
+  if (bid.params.tappxkey == null) {
+    utils.logWarn(`[TAPPX]: Please review the mandatory Tappxkey parameter.`);
+    return false;
+  }
+
+  if (bid.params.host == null) {
+    utils.logWarn(`[TAPPX]: Please review the mandatory Host parameter.`);
+    return false;
+  }
+
+  let classicEndpoint = true
+  if ((new RegExp(`^(vz.*|zz.*)\.*$`, 'i')).test(bid.params.host)) {
+    classicEndpoint = false
+  }
+
+  if (classicEndpoint && bid.params.endpoint == null) {
+    utils.logWarn(`[TAPPX]: Please review the mandatory endpoint Tappx parameters.`);
+    return false;
+  }
+
   return true;
 }
 
@@ -174,11 +191,10 @@ function interpretBid(serverBid, request) {
 * @return response ad
 */
 function buildOneRequest(validBidRequests, bidderRequest) {
-  HOST = utils.deepAccess(validBidRequests, 'params.host');
-  let hostInfo = getHostInfo(HOST);
+  let hostInfo = getHostInfo(validBidRequests);
+  const ENDPOINT = hostInfo.endpoint;
   hostDomain = hostInfo.domain;
 
-  const ENDPOINT = utils.deepAccess(validBidRequests, 'params.endpoint');
   const TAPPXKEY = utils.deepAccess(validBidRequests, 'params.tappxkey');
   const BIDFLOOR = utils.deepAccess(validBidRequests, 'params.bidfloor');
   const BIDEXTRA = utils.deepAccess(validBidRequests, 'params.ext');
@@ -359,7 +375,7 @@ function buildOneRequest(validBidRequests, bidderRequest) {
 
   return {
     method: 'POST',
-    url: `https://${HOST}/${ENDPOINT}?type_cnn=${TYPE_CNN}&v=${TAPPX_BIDDER_VERSION}`,
+    url: `${hostInfo.url}?type_cnn=${TYPE_CNN}&v=${TAPPX_BIDDER_VERSION}`,
     data: JSON.stringify(payload),
     bids: validBidRequests
   };
@@ -375,23 +391,24 @@ function getOs() {
   if (ua == null) { return 'unknown'; } else if (ua.match(/(iPhone|iPod|iPad)/)) { return 'ios'; } else if (ua.match(/Android/)) { return 'android'; } else if (ua.match(/Window/)) { return 'windows'; } else { return 'unknown'; }
 }
 
-function getHostInfo(hostParam) {
+function getHostInfo(validBidRequests) {
   let domainInfo = {};
+  let endpoint = utils.deepAccess(validBidRequests, 'params.endpoint');
+  let hostParam = utils.deepAccess(validBidRequests, 'params.host');
 
   domainInfo.domain = hostParam.split('/', 1)[0];
-  domainInfo.url = hostParam;
 
-  let regexNewEndpoints = new RegExp(`^(vz.*|zz.*|testing)\.ssp\.tappx\.com$`, 'i');
-  let regexClassicEndpoints = new RegExp(`^[a-z]{3}\.[a-z]{3}\.tappx\.com$`, 'i');
+  let regexNewEndpoints = new RegExp(`^(vz.*|zz.*)\.pub\.tappx\.com$`, 'i');
+  let regexClassicEndpoints = new RegExp(`^([a-z]{3}|testing)\.[a-z]{3}\.tappx\.com$`, 'i');
 
   if (regexNewEndpoints.test(domainInfo.domain)) {
-    let endpoint = domainInfo.domain.split('.', 1)[0]
-    if (endpoint.toUpperCase().indexOf('TESTING') === -1) {
-      domainInfo.endpoint = endpoint
-      domainInfo.new_endpoint = true;
-    }
+    domainInfo.newEndpoint = true;
+    domainInfo.endpoint = domainInfo.domain.split('.', 1)[0]
+    domainInfo.url = `https://${hostParam}`
   } else if (regexClassicEndpoints.test(domainInfo.domain)) {
-    domainInfo.new_endpoint = false;
+    domainInfo.newEndpoint = false;
+    domainInfo.endpoint = endpoint
+    domainInfo.url = `https://${hostParam}${endpoint}`
   }
 
   return domainInfo;
diff --git a/modules/tappxBidAdapter.md b/modules/tappxBidAdapter.md
index a07bb2d88d1..776b24bb07c 100644
--- a/modules/tappxBidAdapter.md
+++ b/modules/tappxBidAdapter.md
@@ -9,7 +9,7 @@ Maintainer: prebid@tappx.com
 Module that connects to :tappx demand sources.
 Suppots Banner and Instream Video.
 Please use ```tappx``` as the bidder code.
-Ads sizes available: [320,50], [300,250], [320,480], [1024,768], [728,90]
+Ads sizes available: [300,250], [320,50], [320,480], [480,320], [728,90], [768,1024], [1024,768]
 
 # Banner Test Parameters
 ```
diff --git a/test/spec/modules/tappxBidAdapter_spec.js b/test/spec/modules/tappxBidAdapter_spec.js
index 54c4f8c9dca..9fab7d858e1 100644
--- a/test/spec/modules/tappxBidAdapter_spec.js
+++ b/test/spec/modules/tappxBidAdapter_spec.js
@@ -126,11 +126,35 @@ describe('Tappx bid adapter', function () {
       assert.isTrue(spec.isBidRequestValid(c_BIDREQUEST.bids[0]), JSON.stringify(c_BIDREQUEST));
     });
 
-    it('should return false when required params are missing', function () {
-      let badBidRequest = c_BIDREQUEST;
-      delete badBidRequest.bids[0].params.tappxkey;
-      delete badBidRequest.bids[0].params.endpoint;
-      assert.isFalse(spec.isBidRequestValid(badBidRequest.bids[0]));
+    it('should return false when params are missing', function () {
+      let badBidRequestParam = JSON.parse(JSON.stringify(c_BIDREQUEST));
+      delete badBidRequestParam.bids[0].params;
+      assert.isFalse(spec.isBidRequestValid(badBidRequestParam.bids[0]));
+    });
+
+    it('should return false when tappxkey is missing', function () {
+      let badBidRequestTpxkey = JSON.parse(JSON.stringify(c_BIDREQUEST)); ;
+      delete badBidRequestTpxkey.bids[0].params.tappxkey;
+      assert.isFalse(spec.isBidRequestValid(badBidRequestTpxkey.bids[0]));
+    });
+
+    it('should return false when host is missing', function () {
+      let badBidRequestHost = JSON.parse(JSON.stringify(c_BIDREQUEST)); ;
+      delete badBidRequestHost.bids[0].params.host;
+      assert.isFalse(spec.isBidRequestValid(badBidRequestHost.bids[0]));
+    });
+
+    it('should return false when classic endpoint is missing', function () {
+      let badBidRequestClEp = JSON.parse(JSON.stringify(c_BIDREQUEST)); ;
+      delete badBidRequestClEp.bids[0].params.endpoint;
+      assert.isFalse(spec.isBidRequestValid(badBidRequestClEp.bids[0]));
+    });
+
+    it('should return true when endpoint is not set for new endpoints', function () {
+      let badBidRequestNwEp = JSON.parse(JSON.stringify(c_BIDREQUEST)); ;
+      delete badBidRequestNwEp.bids[0].params.endpoint;
+      badBidRequestNwEp.bids[0].params.host = 'zztesting.ssp.tappx.com/rtb/v2/';
+      assert.isTrue(spec.isBidRequestValid(badBidRequestNwEp.bids[0]));
     });
 
     it('should return false for not instream requests', function () {