> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mapp.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Validate a message

> Validates a prepared message for the following functionality: check that message is valid (InvalidObjectError -> objecttype message), check that message does not contain invalid content store items, check that message does not use archived Attributes (InvalidObjectError -> objecttype attribute).<br>Request body example:<br><br><pre>["1800249570","1800202306"]</pre>

## OpenAPI

````json GET /message/validate
{
  "openapi": "3.0.4",
  "info": {
    "title": "Engage public API",
    "version": "1"
  },
  "servers": [
    {
      "url": "https://your-engage-domain.com/api/rest"
    }
  ],
  "tags": [
    {
      "name": "Address Attributes"
    },
    {
      "name": "Async"
    },
    {
      "name": "Audit Log"
    },
    {
      "name": "Automation"
    },
    {
      "name": "Blacklist"
    },
    {
      "name": "CMS"
    },
    {
      "name": "Contact"
    },
    {
      "name": "Content"
    },
    {
      "name": "Coupon"
    },
    {
      "name": "Draft Message"
    },
    {
      "name": "Ecommerce"
    },
    {
      "name": "Group"
    },
    {
      "name": "Group Attributes"
    },
    {
      "name": "Landing Page"
    },
    {
      "name": "Member Attributes"
    },
    {
      "name": "Membership"
    },
    {
      "name": "Message"
    },
    {
      "name": "Meta"
    },
    {
      "name": "Mobile Push"
    },
    {
      "name": "Prepared Message"
    },
    {
      "name": "Process"
    },
    {
      "name": "Profile Attributes"
    },
    {
      "name": "Related Data"
    },
    {
      "name": "Segmentation"
    },
    {
      "name": "System"
    },
    {
      "name": "System User"
    },
    {
      "name": "Usage Statistics"
    },
    {
      "name": "User"
    },
    {
      "name": "Whiteboard"
    }
  ],
  "paths": {
    "/message/validate": {
      "get": {
        "tags": [
          "Message"
        ],
        "summary": "Validate a message",
        "description": "Validates a prepared message for the following functionality: check that message is valid (InvalidObjectError -> objecttype message), check that message does not contain invalid content store items, check that message does not use archived Attributes (InvalidObjectError -> objecttype attribute).<br>Request body example:<br><br><pre>[\"1800249570\",\"1800202306\"]</pre>",
        "operationId": "validate",
        "parameters": [
          {
            "name": "messageId",
            "in": "query",
            "description": "ID of the message",
            "required": true,
            "schema": {
              "type": "string"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Example response: <br>{<br>    \"entityKey\": \"1800249570\",<br>    \"code\": \"ARCHIVED_ATTRIBUTE\",<br>    \"message\": \"Message contains archived attribute(s) user.CustomAttribute.Attribute1.\"<br>}",
            "content": {
              "application/octet-stream": {
                "schema": {
                  "$ref": "#/components/schemas/CallResult"
                }
              }
            }
          },
          "400": {
            "description": "Message ID does not exist, for example:<br><br><pre>{<br>  \"errorActor\": \"CLIENT\",<br>  \"errorCode\": \"NO_SUCH_OBJECT\",<br>  \"message\": \"Message with id=24011454555 does not exist.\",<br>  \"objectType\": \"Message\",<br>  \"propertyName\": \"id\",<br>  \"propertyValue\": \"24011454555\"<br>}</pre>",
            "content": {
              "application/octet-stream": {}
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "CallResult": {
        "type": "object",
        "properties": {
          "entityKey": {
            "type": "string"
          },
          "code": {
            "type": "string"
          },
          "message": {
            "type": "string"
          }
        }
      }
    }
  }
}
````