> ## 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.

# Update a contact

> Can be used to update contacts. <br>Please Note: If an attribute, for example, mobileNumber, is not included or left empty, any existing value will be removed from the contact’s profile. <br>Request body examples:<br><br><pre>{<br>    "emailAddress": "test20200529@dropmail.mapp.com",<br>    "attributes":<br>    [<br>    {"name": "FirstName", "value": "John"},<br>    {"name": "LastName", "value": "Smith"},             <br>    {"name": "mobileNumber", "value": "335056067010"}, <br>    {"name": "user.ISOCountryCode", "value": "FR"}                        <br>    ]<br>}</pre><br><br>ContactIdentifierType values: EMAIL - The identifier is an email address.<br>MOBILE - The identifier is a mobile number.<br>APP_ALIAS - The identifier is a mobile app alias.<br>EXTERNAL - The identifier is a value generated by an external system.<br>ID - Identifier.

## OpenAPI

````json POST /contact/update
{
  "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": {
    "/contact/update": {
      "post": {
        "tags": [
          "Contact"
        ],
        "summary": "Update a contact",
        "description": "Can be used to update contacts. <br>Please Note: If an attribute, for example, mobileNumber, is not included or left empty, any existing value will be removed from the contact’s profile. <br>Request body examples:<br><br><pre>{<br>    \"emailAddress\": \"test20200529@dropmail.mapp.com\",<br>    \"attributes\":<br>    [<br>    {\"name\": \"FirstName\", \"value\": \"John\"},<br>    {\"name\": \"LastName\", \"value\": \"Smith\"},             <br>    {\"name\": \"mobileNumber\", \"value\": \"335056067010\"}, <br>    {\"name\": \"user.ISOCountryCode\", \"value\": \"FR\"}                        <br>    ]<br>}</pre><br><br>ContactIdentifierType values: EMAIL - The identifier is an email address.<br>MOBILE - The identifier is a mobile number.<br>APP_ALIAS - The identifier is a mobile app alias.<br>EXTERNAL - The identifier is a value generated by an external system.<br>ID - Identifier.",
        "operationId": "update",
        "parameters": [
          {
            "name": "identifierType",
            "in": "query",
            "description": "The type of identifier to be used for the contact update.",
            "required": true,
            "schema": {
              "enum": [
                "APP_ALIAS",
                "EMAIL",
                "EXTERNAL",
                "ID",
                "MOBILE"
              ],
              "type": "string"
            }
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/Contact"
              }
            }
          },
          "x-bodyName": "body"
        },
        "responses": {
          "200": {
            "description": "",
            "content": {
              "application/octet-stream": {
                "schema": {
                  "$ref": "#/components/schemas/Contact"
                }
              }
            }
          },
          "400": {
            "description": "Parameter unifiedIdentifierName and identifierType are  mandatory, but are missing or incorrect.",
            "content": {
              "application/octet-stream": {}
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "Contact": {
        "type": "object",
        "properties": {
          "contactId": {
            "type": "integer",
            "format": "int64"
          },
          "emailAddress": {
            "type": "string"
          },
          "mobileNumber": {
            "type": "string"
          },
          "applicationAlias": {
            "type": "string"
          },
          "identifier": {
            "type": "string"
          },
          "attributes": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/Attribute"
            }
          },
          "channelAddresses": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/Attribute"
            }
          }
        }
      },
      "Attribute": {
        "type": "object",
        "properties": {
          "name": {
            "type": "string"
          },
          "value": {
            "type": "string"
          }
        }
      }
    }
  }
}
````