StartOutboundVoiceContact - Amazon Connect Service


Places an outbound call to a contact, and then initiates the contact flow. It performs the actions in the contact flow that's specified (in ContactFlowId).

Agents do not initiate the outbound API, which means that they do not dial the contact. If the contact flow places an outbound call to a contact, and then puts the contact in queue, the call is then routed to the agent, like any other inbound case.

There is a 60-second dialing timeout for this operation. If the call is not connected after 60 seconds, it fails.


UK numbers with a 447 prefix are not allowed by default. Before you can dial these UK mobile numbers, you must submit a service quota increase request. For more information, see Amazon Connect Service Quotas in the Amazon Connect Administrator Guide.

Request Syntax

PUT /contact/outbound-voice HTTP/1.1 Content-type: application/json { "Attributes": { "string" : "string" }, "ClientToken": "string", "ContactFlowId": "string", "DestinationPhoneNumber": "string", "InstanceId": "string", "QueueId": "string", "SourcePhoneNumber": "string" }

URI Request Parameters

The request does not use any URI parameters.

Request Body

The request accepts the following data in JSON format.


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: No


A unique, case-sensitive identifier that you provide to ensure the idempotency of the request. The token is valid for 7 days after creation. If a contact is already started, the contact ID is returned.

Type: String

Length Constraints: Maximum length of 500.

Required: No


The identifier of the contact flow for the outbound call. To see the ContactFlowId in the Amazon Connect console user interface, on the navigation menu go to Routing, Contact Flows. Choose the contact flow. On the contact flow page, under the name of the contact flow, choose Show additional flow information. The ContactFlowId is the last part of the ARN, shown here in bold:


Type: String

Length Constraints: Maximum length of 500.

Required: Yes


The phone number of the customer, in E.164 format.

Type: String

Required: Yes


The identifier of the Amazon Connect instance. You can find the instanceId in the ARN of the instance.

Type: String

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

Required: Yes


The queue for the call. If you specify a queue, the phone displayed for caller ID is the phone number specified in the queue. If you do not specify a queue, the queue defined in the contact flow is used. If you do not specify a queue, you must specify a source phone number.

Type: String

Required: No


The phone number associated with the Amazon Connect instance, in E.164 format. If you do not specify a source phone number, you must specify a queue.

Type: String

Required: No

Response Syntax

HTTP/1.1 200 Content-type: application/json { "ContactId": "string" }

Response Elements

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

The following data is returned in JSON format by the service.


The identifier of this contact within the Amazon Connect instance.

Type: String

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


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


Outbound calls to the destination number are not allowed.

HTTP Status Code: 403


Request processing failed because of 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 allowed limit for the resource has been exceeded.

HTTP Status Code: 429


The contact is not permitted.

HTTP Status Code: 403


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: