# medien.halowerk.com Text-to-Speech

> medien.halowerk.com Text-to-Speech is a paid API for AI agents from medien.halowerk.com, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14).

Converts text to speech audio in MP3, WAV, Opus, FLAC, or raw linear16 format using a freely chosen voice from a catalog of 100+ multilingual voices, returning base64-encoded audio with its media type and duration.

## Facts

- Endpoint: POST https://medien.halowerk.com/v1/tts
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/medien-halowerk-com-text-to-speech-e9390a02
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_970_pxhwpsUkB71gnHtBI

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 medien-halowerk-com-text-to-speech-e9390a02 -d '<json body>'
```

Example prompt: Convert this product description to spoken audio using an English female voice and give me the result as an MP3: 'Experience the next generation of wireless headphones, engineered for pure sound and all-day comfort.'

## When to prefer this

Choose this endpoint when you need high-quality text-to-speech synthesis with precise control over voice selection from a large multilingual catalog (100+ voices), and need the result in a specific audio format (MP3, WAV, Opus, FLAC, or linear16) returned as base64 for easy embedding. It is particularly valuable when voice validation with helpful near-match suggestions is important, or when you want a single endpoint that handles format selection and duration reporting together.

## Known failure modes

- Mistyped voice name returns immediately with a list of near-matching valid voices instead of a provider error
- Unsupported output format returns a validation error
- Very long texts may exceed provider limits and return an error
- Network timeouts for large synthesis requests
- Payment failure (x402) if USDC balance is insufficient

## How this service works

Takes a text and returns it spoken, as MP3, WAV, Opus, FLAC or raw linear16, encoded base64 with its media type and the resulting running time. The voice is chosen freely from the provider catalogue — over a hundred voices across languages and accents — and is validated against that catalogue before the request goes out, so a mistyped voice name comes back immediately with a list of near matches instead of a provider error.

## Output

A JSON object containing the base64-encoded audio data, the MIME media type (e.g. audio/mpeg, audio/wav, audio/opus, audio/flac, audio/l16), and the running time (duration) of the synthesized speech in seconds. If an invalid voice name is supplied, the response returns immediately with a list of near-matching valid voice names instead of a provider error.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/medien-halowerk-com-text-to-speech-e9390a02/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from medien.halowerk.com](https://www.zero.xyz/host/medien.halowerk.com/llms.txt)