Text to audio

Endpoint: POST https://4zapi.com/kling/v1/audio/text-to-audio

Request body (application/json)

• duration (string, required): Audio duration in seconds; range 3.0–10.0, one decimal place supported
• prompt (string, required): Text prompt
• callback_url (string): Callback URL invoked on task completion
• external_task_id (string): Custom external task ID for business-side correlation

Request example

{
  "callback_url": "",
  "duration": "5",
  "external_task_id": "",
  "prompt": "描述风景的音频"
}