diff --git a/jans-config-api/common/src/main/java/io/jans/configapi/util/AttributeNames.java b/jans-config-api/common/src/main/java/io/jans/configapi/util/AttributeNames.java
index 4b3aefc3634..2dcb60edb13 100644
--- a/jans-config-api/common/src/main/java/io/jans/configapi/util/AttributeNames.java
+++ b/jans-config-api/common/src/main/java/io/jans/configapi/util/AttributeNames.java
@@ -20,6 +20,7 @@ public class AttributeNames {
     public static final String SCOPES = "scopes";
     public static final String GRANT_TYPES = "grant types";
     public static final String DATA_TYPE = "dataType";
+    public static final String REDIRECT_URIS = "redirectUris";
 
     private AttributeNames() {
     }
diff --git a/jans-config-api/docs/jans-config-api-swagger.yaml b/jans-config-api/docs/jans-config-api-swagger.yaml
index da81a9d7fc7..4c6ca047ddc 100644
--- a/jans-config-api/docs/jans-config-api-swagger.yaml
+++ b/jans-config-api/docs/jans-config-api-swagger.yaml
@@ -1892,8 +1892,8 @@ paths:
     post:
       tags:
         - OAuth - OpenID Connect - Clients
-      summary: Create new OpenId connect client
-      description: Create new OpenId connect client
+      summary: Create new OpenId Connect client
+      description: Create new OpenId Connect client
       operationId: post-oauth-openid-clients
       requestBody:
         content:
@@ -5048,10 +5048,7 @@ components:
       description: Client.
       type: object
       required:
-        - applicationType
-        - logout
-        - includeClaimsInIdToken
-        - displayName
+        - redirectUris
       properties:
         dn:
           type: string
@@ -6061,6 +6058,10 @@ components:
       properties:
         month:
           type: integer
+        start_month:
+          type: integer
+        end_month:
+          type: integer
         monthly_active_users:
           type: integer
           format: int64
diff --git a/jans-config-api/server/src/main/java/io/jans/configapi/rest/resource/auth/ClientsResource.java b/jans-config-api/server/src/main/java/io/jans/configapi/rest/resource/auth/ClientsResource.java
index 5f5dc9a7abd..796c57d7e90 100644
--- a/jans-config-api/server/src/main/java/io/jans/configapi/rest/resource/auth/ClientsResource.java
+++ b/jans-config-api/server/src/main/java/io/jans/configapi/rest/resource/auth/ClientsResource.java
@@ -116,7 +116,7 @@ public Response createOpenIdConnect(@Valid Client client) throws EncryptionExcep
             inum = inumService.generateClientInum();
             client.setClientId(inum);
         }
-        checkNotNull(client.getDisplayName(), AttributeNames.DISPLAY_NAME);
+        checkNotNull(client.getRedirectUris(), AttributeNames.REDIRECT_URIS);
         
         //scope validation
         checkScopeFormat(client);
@@ -148,7 +148,7 @@ public Response updateClient(@Valid Client client) throws EncryptionException {
         }
         String inum = client.getClientId();
         checkNotNull(inum, AttributeNames.INUM);
-        checkNotNull(client.getDisplayName(), AttributeNames.DISPLAY_NAME);
+        checkNotNull(client.getRedirectUris(), AttributeNames.REDIRECT_URIS);
         Client existingClient = clientService.getClientByInum(inum);
         checkResourceNotNull(existingClient, OPENID_CONNECT_CLIENT);
         
diff --git a/jans-config-api/server/src/main/java/io/jans/configapi/rest/resource/auth/StatResource.java b/jans-config-api/server/src/main/java/io/jans/configapi/rest/resource/auth/StatResource.java
index e754cebc603..3e86e25f8ab 100644
--- a/jans-config-api/server/src/main/java/io/jans/configapi/rest/resource/auth/StatResource.java
+++ b/jans-config-api/server/src/main/java/io/jans/configapi/rest/resource/auth/StatResource.java
@@ -35,8 +35,8 @@ public class StatResource extends ConfigBaseResource {
     @Produces(MediaType.APPLICATION_JSON)
     public Response getStatistics(@HeaderParam("Authorization") String authorization,
                                   @QueryParam(value = "month") String month,
-                                  @QueryParam(value = "start-month") String startMonth,
-                                  @QueryParam(value = "end-month") String endMonth,
+                                  @QueryParam(value = "start_month") String startMonth,
+                                  @QueryParam(value = "end_month") String endMonth,
                                   @QueryParam(value = "format") String format) {
         if (StringUtils.isBlank(format)) {
             format = "";
diff --git a/jans-config-api/shared/src/main/java/io/jans/configapi/core/rest/BaseResource.java b/jans-config-api/shared/src/main/java/io/jans/configapi/core/rest/BaseResource.java
index 18a82e45c25..dd7cf017fcb 100644
--- a/jans-config-api/shared/src/main/java/io/jans/configapi/core/rest/BaseResource.java
+++ b/jans-config-api/shared/src/main/java/io/jans/configapi/core/rest/BaseResource.java
@@ -42,6 +42,12 @@ public static void checkNotNull(String attribute, String attributeName) {
         }
     }
 
+    public static void checkNotNull(String[] attributes, String attributeName) {
+        if (attributes == null || attributes.length <= 0) {
+            throw new BadRequestException(getMissingAttributeError(attributeName));
+        }
+    }
+
     public static void throwMissingAttributeError(String attributeName) {
         if (StringUtils.isNotEmpty(attributeName)) {
             throw new BadRequestException(getMissingAttributeError(attributeName));