# POST /v1/convai/batch-calling/submit (ElevenLabs API)
Base URL: https://api.elevenlabs.io
Auth: xi-api-key: <ELEVENLABS_API_KEY>
Last verified: 2026-09-03

> Submit A Batch Call Request.

## Critical Gotchas
* Authentication uses the non-standard `xi-api-key` header, not `Authorization: Bearer`. Sending a Bearer token returns HTTP 401.
* Text-to-speech responses are raw binary audio, not JSON. Write the body to a file (`--output speech.mp3`) rather than parsing it.

## cURL
curl -X POST 'https://api.elevenlabs.io/v1/convai/batch-calling/submit' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"call_name":"string","agent_id":"string"}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| call_name | body | string | Yes | Request body field call_name. |
| agent_id | body | string | Yes | Request body field agent_id. |
| recipients | body | object[] | Yes | Request body field recipients. |
| scheduled_time_unix | body | integer | No | Request body field scheduled_time_unix. |

## Response (200 OK)
{"id":"string","phone_number_id":"string"}

---
Need an API key? Get one at https://elevenlabs.io/app/sign-up