# Fish Audio Speech Synthesis

> Fish Audio Speech Synthesis is a paid API for AI agents from Fish Audio at fish-audio.mpp.tempo.xyz, paid per call via MPP, price unknown, status unknown (last checked 2026-10-29).

Converts text to speech audio bytes using Fish Audio voice models, billed per character or audio unit via one-shot USDC payment

## Facts

- Endpoint: POST https://fish-audio.mpp.tempo.xyz/v1/audio/speech?utm_source=zero.xyz
- Price: price unknown
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Provider: Fish Audio
- Docs: https://openrouter.ai
- Website: https://openrouter.ai
- Tags: ai
- Canonical page: https://www.zero.xyz/c/fish-audio-speech-synthesis-99da73c3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dHoU2sTSeP9ICSxsEWmMo

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fish-audio-speech-synthesis-99da73c3 -d '<json body>'
```

Example prompt: Can you synthesize this paragraph into spoken audio using Fish Audio — use the default voice model and convert this text: 'Welcome to our platform. We are excited to have you here.'

## When to prefer this

Choose this endpoint when you need high-quality AI-generated speech audio from Fish Audio's voice models, especially when operating in a crypto-native or agent payment environment that supports x402 one-shot USDC billing. It is ideal for agents that need to produce voiceovers, narrations, or spoken content on demand without managing a long-term subscription, and when you want access to Fish Audio's specific voice catalog and pricing transparency via the companion /v1/audio/models endpoint.

## Known failure modes

- Invalid or unsupported voice model ID returns an error
- Text input too long for the selected model's character limit
- Insufficient USDC balance for the one-shot payment charge
- Malformed request body missing required text or model fields
- Unsupported audio output format requested
- Rate limiting if too many requests are made in quick succession

## How this service works

Generate speech/audio bytes (one-shot charge; character or bounded audio pricing; models, prices and voices at GET /v1/audio/models)

## Output

Returns raw audio bytes representing the synthesized speech of the provided text, in the audio format produced by the selected Fish Audio voice model. The agent receives binary audio data ready for playback, storage, or further processing.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fish-audio-speech-synthesis-99da73c3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fish-audio.mpp.tempo.xyz](https://www.zero.xyz/host/fish-audio.mpp.tempo.xyz/llms.txt)