# x402 Voice-to-Text Transcription

> x402 Voice-to-Text Transcription is a paid API for AI agents from voice.cyberwarex.com, paid per call via x402, $0.015/call, status unknown (last checked 2026-10-13).

Transcribes uploaded audio files to text, billed per 10-second block via x402 micropayment

## Facts

- Endpoint: POST https://voice.cyberwarex.com/transcribe?utm_source=zero.xyz
- Price: $0.015/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-voice-to-text-transcription-56556834
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dF89mRAKBBX8L1ZoE94oT

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 x402-voice-to-text-transcription-56556834 -d '<json body>'
```

Example prompt: Can you transcribe this audio recording for me? I have a binary audio file from an interview I need converted to text.

## When to prefer this

Choose this endpoint when you need to convert speech audio to text and want pay-per-use micropayment billing via the x402 protocol, avoiding subscription commitments. Suitable for agents that process variable volumes of audio on demand.

## Known failure modes

- Unsupported audio format or corrupted file returns an error
- Payment failure via x402 protocol prevents transcription
- Audio file too large or malformed binary data returns rejection
- Very noisy or low-quality audio may result in inaccurate or incomplete transcription
- Missing or empty file field returns a validation error

## How this service works

Speech-to-text transcription for voice messages and audio clips. Upload a wav, mp3, m4a, ogg or webm file as multipart form-data and get the spoken text back as JSON. Runs a dedicated ASR model, so short noisy voice notes transcribe accurately. Accepts clips up to 10 minutes / 25 MB, billed per 10-second block. Use it to turn voice notes, call recordings, podcast clips or voicemail into text an agent can read.

## Output

Returns a text transcript of the spoken content in the uploaded audio file, extracted from the binary audio data and billed per 10-second block of audio processed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "file": {
   "type": "string",
   "format": "binary",
   "description": "Audio file to transcribe (wav, mp3, m4a, ogg, webm, flac). Max 10 minutes and 25 MB."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "Hey, quick voice note about the Q3 roadmap. Can we move the launch review to Thursday?"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-voice-to-text-transcription-56556834/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from voice.cyberwarex.com](https://www.zero.xyz/host/voice.cyberwarex.com/llms.txt)