Text-to-speech — narration (50k)

• POST

  /paid/compute/tts-longform▾

  Narrate long-form text - articles, newsletters, audiobook chapters up to 50,000 characters, English (6 voices) and Korean. Submit text, get a jobId instantly, poll /paid/jobs/{jobId} and download the mp3 from its audioUrl (free). Usage-based billing: $0.003 per minute of generated audio, authorized at a $0.36 ceiling and settled at the measured length. Failed jobs are never charged. For short snippets under 2,000 chars, Text-to-speech — short returns audio instantly.

  HPP Mainnetup to $0.36

  https://agent.hpp.io/paid/compute/tts-longform

  Scheme	Network	Asset	Price
  upto	HPP Mainnet	USDC.e	up to $0.36

  Request & response

  POSTjson

  Request body

  Field	Type	Required	Description
  text	string	required	Text to narrate, up to 50,000 characters
  speed	number	optional	0.5 to 2.0, default 1.0
  voice	string	optional	af_heart (default), af_bella, am_adam, am_michael, bf_emma, bm_george, or ko

  Example response

  {
    "jobId": "…",
    "status": "queued",
    "pollUrl": "/paid/jobs/…",
    "perMinuteAtomic": "3000"
  }

  Raw discovery info

  {
    "input": {
      "body": {
        "text": "Chapter one. It was a bright cold day in April…",
        "voice": "af_heart"
      },
      "type": "http",
      "method": "POST",
      "bodyType": "json"
    },
    "output": {
      "type": "json",
      "example": {
        "jobId": "…",
        "status": "queued",
        "pollUrl": "/paid/jobs/…",
        "perMinuteAtomic": "3000"
      }
    }
  }

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