# medien.halowerk.com Speech-to-Text (STT)

> medien.halowerk.com Speech-to-Text (STT) is a paid API for AI agents from medien.halowerk.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Transcribes an audio or video file (by URL or base64) into full text with per-word timestamps, confidence scores, utterances, paragraphs, and detected language.

## Facts

- Endpoint: POST https://medien.halowerk.com/v1/stt
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/medien-halowerk-com-speech-to-text-stt-22257e66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OstYeoxjTNMsgEhNA_ApP

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-speech-to-text-stt-22257e66 -d '<json body>'
```

Example prompt: Can you transcribe the audio at https://example.com/meeting.mp3 and give me the full text along with word-by-word timestamps and confidence scores? I didn't specify a language, so please auto-detect it.

## When to prefer this

Choose this endpoint when you need a detailed, word-level transcript with timestamps and confidence scores from an audio or video file — especially when you also want automatic language detection. It is particularly useful for pipelines that need structured transcript data (utterances, paragraphs) beyond a plain text dump, and it accepts both remote URLs and inline base64, making it flexible for various file sources.

## Known failure modes

- Unreachable or invalid file URL returns an error with no transcript
- Unsupported audio/video format may result in a processing failure
- Very long files may time out or exceed size limits
- Corrupted base64 payload causes decoding errors
- Silent or near-silent audio may yield an empty or low-confidence transcript
- Non-speech audio (music only) may produce garbled or empty output

## How this service works

Takes an audio or video file by URL or inline base64 and returns the transcript: the full text, every word with start and end time and its own confidence, the utterances and paragraphs the recogniser separated, and the detected language with its confidence where no language was specified.

## Output

Returns the full transcript as plain text, a word-level array with each word's start time, end time, and confidence score, the utterances and paragraphs the recogniser identified, and (when no language was specified) the detected language with its confidence score.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/medien-halowerk-com-speech-to-text-stt-22257e66/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)