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

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Creates or updates the contact attributes associated with the specified contact.

You can 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 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.

Important: 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.


The Amazon Connect attributes. These attributes can be accessed in contact flows just like any other contact attributes.

You can have up to 32,768 UTF-8 bytes across all attributes for a 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 identifier of the contact. This is the identifier of 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 of the Amazon Connect instance.

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 specified parameters 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: