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

# Cartesia Voice Preview

> Fetch and stream a Cartesia voice sample for voice-picker playback.

Use this endpoint when a Cartesia voice does not provide a direct preview URL in search results.

<ParamField path="id" type="string" required>
  Cartesia voice ID.
</ParamField>

### Response

Returns binary audio content (`audio/*`) for immediate playback.

<ResponseField name="Content-Type" type="string">
  Audio MIME type returned by Cartesia preview media.
</ResponseField>

<ResponseField name="Cache-Control" type="string">
  Public cache header for preview media (`public, max-age=3600`).
</ResponseField>

<ResponseExample>
  ```http Response theme={null}
  HTTP/1.1 200 OK
  Content-Type: audio/mpeg
  Cache-Control: public, max-age=3600

  [binary audio data]
  ```
</ResponseExample>

<Note>
  If a voice has no preview sample, this endpoint returns `404`.
</Note>