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

> Create Image Generation

## 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/flows/image' \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"webhook":{"type":"all"},"prompt":"string"}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| prompt | body | string | Yes | A text description of the image to ge... |
| model_id | body | string | Yes | The model to use for the generation. |
| webhook | body | object | No | Include to send the generation's resu... |

## Response (200 OK)
{"id":"JWr5N6X9ZTqf8jD2LmQb","status":"pending"}

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