> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stateset.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Outbound Call

> Tenant-scoped voice call operation for starting outbound AI calls or coordinating Twilio call setup.

Tenant-scoped voice call operation for starting outbound AI calls or coordinating Twilio call setup.

### Response

Returns `string`.

<Note>
  The spec this page is generated from declares this response as an untyped object — the server
  returns JSON, but its shape is not published. Read a live response to see the fields; treat any
  field you find as unversioned until the spec names it.
</Note>

### Status codes

| Code  | Meaning                                                    |
| ----- | ---------------------------------------------------------- |
| `200` | TwiML response that connects the SIP call to /media-stream |
| `401` | Unauthorized                                               |
| `500` | Internal server error                                      |

<RequestExample>
  ```bash cURL theme={null}
  curl --request POST \
    --url 'https://api.voice.stateset.com/api/v1/outbound-call-sip' \
    --header 'Authorization: Bearer YOUR_API_KEY'
  ```
</RequestExample>

<ResponseExample>
  ```json 200 theme={null}
  "string"
  ```
</ResponseExample>