diff --git a/swagger/definitions/request/conversation/create_message.yml b/swagger/definitions/request/conversation/create_message.yml
index 9082f1318..c8f4efc7f 100644
--- a/swagger/definitions/request/conversation/create_message.yml
+++ b/swagger/definitions/request/conversation/create_message.yml
@@ -19,3 +19,24 @@ properties:
   content_attributes:
     type: object
     description: attributes based on your content type
+  template_params:
+    type: object
+    description: The template params for the message in case of whatsapp Channel
+    properties:
+      name:
+        type: string
+        description: Name of the template
+        example: 'sample_issue_resolution'
+      category:
+        type: string
+        description: Category of the template
+        example: UTILITY
+      language:
+        type: string
+        description: Language of the template
+        example: en_US
+      processed_params: 
+        type: object
+        description: The processed param values for template variables in template
+        example: 
+          1: "Chatwoot"
diff --git a/swagger/paths/application/conversation/index.yml b/swagger/paths/application/conversation/index.yml
index 4c9241464..c1cb199b0 100644
--- a/swagger/paths/application/conversation/index.yml
+++ b/swagger/paths/application/conversation/index.yml
@@ -66,6 +66,9 @@ post:
       required: true
       schema:
         type: object
+        required:
+          - source_id
+          - inbox_id
         properties:
           source_id:
             type: string
@@ -93,7 +96,35 @@ post:
           team_id:
             type: string
             description: Team Id for assigning a conversation to a team
-
+          message:
+            type: object
+            description: The initial message to be sent to the conversation
+            required: ['content']
+            properties:
+              content:
+                type: string
+                description: The content of the message
+              template_params:
+                type: object
+                description: The template params for the message in case of whatsapp Channel
+                properties:
+                  name:
+                    type: string
+                    description: Name of the template
+                    example: 'sample_issue_resolution'
+                  category:
+                    type: string
+                    description: Category of the template
+                    example: UTILITY
+                  language:
+                    type: string
+                    description: Language of the template
+                    example: en_US
+                  processed_params: 
+                    type: object
+                    description: The processed param values for template variables in template
+                    example: 
+                      1: "Chatwoot"
   responses:
     200:
       description: Success
diff --git a/swagger/swagger.json b/swagger/swagger.json
index cd8f3e7d3..9c6093fcf 100644
--- a/swagger/swagger.json
+++ b/swagger/swagger.json
@@ -2840,6 +2840,10 @@
             "required": true,
             "schema": {
               "type": "object",
+              "required": [
+                "source_id",
+                "inbox_id"
+              ],
               "properties": {
                 "source_id": {
                   "type": "string",
@@ -2881,6 +2885,47 @@
                 "team_id": {
                   "type": "string",
                   "description": "Team Id for assigning a conversation to a team"
+                },
+                "message": {
+                  "type": "object",
+                  "description": "The initial message to be sent to the conversation",
+                  "required": [
+                    "content"
+                  ],
+                  "properties": {
+                    "content": {
+                      "type": "string",
+                      "description": "The content of the message"
+                    },
+                    "template_params": {
+                      "type": "object",
+                      "description": "The template params for the message in case of whatsapp Channel",
+                      "properties": {
+                        "name": {
+                          "type": "string",
+                          "description": "Name of the template",
+                          "example": "sample_issue_resolution"
+                        },
+                        "category": {
+                          "type": "string",
+                          "description": "Category of the template",
+                          "example": "UTILITY"
+                        },
+                        "language": {
+                          "type": "string",
+                          "description": "Language of the template",
+                          "example": "en_US"
+                        },
+                        "processed_params": {
+                          "type": "object",
+                          "description": "The processed param values for template variables in template",
+                          "example": {
+                            "1": "Chatwoot"
+                          }
+                        }
+                      }
+                    }
+                  }
                 }
               }
             }
@@ -6246,6 +6291,34 @@
         "content_attributes": {
           "type": "object",
           "description": "attributes based on your content type"
+        },
+        "template_params": {
+          "type": "object",
+          "description": "The template params for the message in case of whatsapp Channel",
+          "properties": {
+            "name": {
+              "type": "string",
+              "description": "Name of the template",
+              "example": "sample_issue_resolution"
+            },
+            "category": {
+              "type": "string",
+              "description": "Category of the template",
+              "example": "UTILITY"
+            },
+            "language": {
+              "type": "string",
+              "description": "Language of the template",
+              "example": "en_US"
+            },
+            "processed_params": {
+              "type": "object",
+              "description": "The processed param values for template variables in template",
+              "example": {
+                "1": "Chatwoot"
+              }
+            }
+          }
         }
       }
     },