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ZeroClick Text-to-Speech (chatterbox-nano)
ZeroClick Text-to-Speech (chatterbox-nano) is a paid API for AI agents from agents.zerogpu.ai, paid per call via MPP, price unknown, status unknown (last checked 2026-10-16).
Converts text to spoken audio using the chatterbox-nano model, with optional voice cloning from a sample, returning a binary audio stream.
Price / call—
Success—
StatusUnknown
How this service works
Text-to-speech, with optional voice cloning from a `voice_sample` sent as multipart. The body is streamed upstream unread, so the model is the configured `chatterbox-nano` rather than one read from the request. Billed per audio second: the allowance check asks for the 1-second floor, and `zc-usage` reports `max(1, ceil(x-audio-duration-seconds))` audio seconds on success. Authenticated by verifying the `zc-signature` HMAC over the raw request bytes; the same orchestration as `/v1/audio/speech` runs behind it.
Output
A binary audio stream in the requested format (mp3, opus, aac, flac, wav, or pcm). PCM is raw 16-bit little-endian mono at 24 kHz. The response header x-audio-duration-seconds indicates the length, and billing is computed as max(1, ceil(duration)) audio seconds.
Example use cases
Voice-over narration for product demo
“Turn this script into a natural-sounding mp3 voice-over using the 'coral' voice: 'Introducing SmartTrack — the easiest way to manage your inventory in real time.'”
Podcast intro with cloned host voice
“I'm attaching a short audio sample of my voice — use it to clone my voice and read this intro text aloud as a wav file: 'Hey everyone, welcome back to the show. Today we're diving into the future of AI.'”
Accessibility audio for article
“Convert this article paragraph to speech so visually impaired users can listen to it — output as opus audio using the default voice: 'Scientists have discovered a new exoplanet orbiting a star 40 light-years away.'”
Technical details
Endpoint
POSThttps://agents.zerogpu.ai/zeroclick/v1/audio/speech?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need ZeroClick HMAC-authenticated text-to-speech using the chatterbox-nano model, especially when voice cloning from a sample is required or when operating within a ZeroGPU agent workflow that already manages zc-signature authentication. Prefer this over the unauthenticated /v1/audio/speech when acting as a ZeroClick-proxied agent. It supports OpenAI-compatible voice names and output formats, making it a drop-in for OpenAI TTS workflows.
Side effects
- Invalid or missing zc-signature HMAC → 401 Unauthorized
- Input text exceeds 2000 characters → 422 Validation Error
- Insufficient credit balance for at least 1 audio second → 402 Payment Required
- Malformed multipart voice_sample → 400 Bad Request
- Model unavailable or overloaded → 503 Service Unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | integer | Pins sampling for repeatable output (best-effort). |
| inputrequired | string | The text to speak. Inline tags such as `[laugh]` and `[cough]` add paralinguistic cues. |
| model | string | Model identifier. The endpoint serves `chatterbox-nano`. |
| top_k | integer | Top-k sampling. |
| top_p | number | Nucleus sampling. |
| voice | string | OpenAI voice names are accepted and all map to the built-in voice. |
| temperature | number | Sampling temperature. |
| response_format | string | `pcm` is raw 16-bit little-endian mono at 24 kHz. |
| repetition_penalty | number | Penalty on repeated speech tokens. |
Output
Schema · Response
{
"type": "string",
"format": "binary"
}Reviews
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