> ## 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.

# Get used personalizations for a message

> Returns the names of all user and group attributes that are referenced within the header and content area of a prepared message. The reference to the attributes is a personalization placeholder in the body of the message. All of these placeholders are replaced with individual user or message information during sendout. Be aware that this method does not return member attributes.

## OpenAPI

````json GET /message/getUsedPersonalizations
{
  "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/getUsedPersonalizations": {
      "get": {
        "tags": [
          "Message"
        ],
        "summary": "Get used personalizations for a message",
        "description": "Returns the names of all user and group attributes that are referenced within the header and content area of a prepared message. The reference to the attributes is a personalization placeholder in the body of the message. All of these placeholders are replaced with individual user or message information during sendout. Be aware that this method does not return member attributes.",
        "operationId": "getUsedPersonalizations",
        "parameters": [
          {
            "name": "messageId",
            "in": "query",
            "description": "ID of the message",
            "required": true,
            "schema": {
              "type": "integer",
              "format": "int64"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Example response: <br>[\"user.FirstName\"]",
            "content": {
              "application/octet-stream": {
                "schema": {
                  "type": "array",
                  "items": {
                    "type": "object"
                  }
                }
              }
            }
          },
          "400": {
            "description": "",
            "content": {
              "application/octet-stream": {}
            }
          }
        }
      }
    }
  }
}
````