# Apiosk Gateway Speech-to-Text (WAV URL)

> Apiosk Gateway Speech-to-Text (WAV URL) is a paid API for AI agents from gateway.apiosk.com, paid per call via x402, $0.309375/call, status unknown (last checked 2026-09-16).

Transcribes a WAV audio file hosted at a given URL into text using speech recognition, returning the transcription as a string.

## Facts

- Endpoint: POST https://gateway.apiosk.com/apyhub-speech-to-text/stt/url
- Price: $0.309375/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/apiosk-gateway-speech-to-text-wav-url-ffe340f8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9D2Z-WXNfP4nCB_0ryhG6

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 apiosk-gateway-speech-to-text-wav-url-ffe340f8 -d '<json body>'
```

Example prompt: Please transcribe this WAV audio file for me — it's hosted at https://example.com/recording.wav and it's in English.

## When to prefer this

Use this endpoint when you have a WAV audio file accessible via a public URL and need a fast, pay-per-call speech-to-text transcription without setting up your own ASR infrastructure. Best suited for single-file, on-demand transcription tasks where the file is already hosted remotely.

## Known failure modes

- Unreachable or invalid WAV URL returns an error
- Non-WAV audio format at the URL may fail to process
- Unsupported or mismatched language code reduces accuracy
- Very long audio files may time out or exceed processing limits
- Poor audio quality or heavy background noise degrades transcription accuracy

## How this service works

Transcribes a WAV audio file from a URL into text. Send the source file URL and language, and the response returns the transcription as a string.

## Output

Returns the transcription of the audio as a plain text string containing the spoken words recognized from the WAV file.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/apiosk-gateway-speech-to-text-wav-url-ffe340f8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from gateway.apiosk.com](https://www.zero.xyz/host/gateway.apiosk.com/llms.txt)