Amazon Connect Service
API Reference (API Version 2017-08-08)


The UpdateContactAttributes operation lets you programmatically create new, or update existing, contact attributes associated with a contact. You can use the operation to add or update attributes for both ongoing and completed contacts. For example, you can update the customer's name or the reason the customer called while the call is active, or add notes about steps that the agent took during the call that are displayed to the next agent that takes the call. You can also use the UpdateContactAttributes operation to update attributes for a contact using data from your CRM application and save the data with the contact in Amazon Connect. You could also flag calls for additional analysis, such as legal review or identifying abusive callers.

Contact attributes are available in Amazon Connect for 24 months, and are then deleted.


You cannot use the operation to update attributes for contacts that occurred prior to the release of the API, September 12, 2018. You can update attributes only for contacts that started after the release of the API. If you attempt to update attributes for a contact that occurred prior to the release of the API, a 400 error is returned. This applies also to queued callbacks that were initiated prior to the release of the API but are still active in your instance.

Request Syntax

POST /contact/attributes HTTP/1.1 Content-type: application/json { "Attributes": { "string" : "string" }, "InitialContactId": "string", "InstanceId": "string" }

URI Request Parameters

The request does not use any URI parameters.

Request Body

The request accepts the following data in JSON format.


Specify a custom key-value pair using an attribute map. The attributes are standard Amazon Connect attributes, and can be accessed in contact flows just like any other contact attributes.

There can be up to 32,768 UTF-8 bytes across all key-value pairs per contact. Attribute keys can include only alphanumeric, dash, and underscore characters.

Type: String to string map

Key Length Constraints: Minimum length of 1. Maximum length of 32767.

Value Length Constraints: Minimum length of 0. Maximum length of 32767.

Required: Yes


The unique identifier of the contact for which to update attributes. This is the identifier for the contact associated with the first interaction with the contact center.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Required: Yes


The identifier for your Amazon Connect instance. To find the ID of your instance, open the AWS console and select Amazon Connect. Select the alias of the instance in the Instance alias column. The instance ID is displayed in the Overview section of your instance settings. For example, the instance ID is the set of characters at the end of the instance ARN, after instance/, such as 10a4c4eb-f57e-4d4c-b602-bf39176ced07.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 100.

Required: Yes

Response Syntax

HTTP/1.1 200

Response Elements

If the action is successful, the service sends back an HTTP 200 response with an empty HTTP body.


For information about the errors that are common to all actions, see Common Errors.


Request processing failed due to an error or failure with the service.

HTTP Status Code: 500


One or more of the parameters provided to the operation are not valid.

HTTP Status Code: 400


The request is not valid.

HTTP Status Code: 400


The specified resource was not found.

HTTP Status Code: 404

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: