# GEDX402 Whisper Large V3 Turbo ASR

> GEDX402 Whisper Large V3 Turbo ASR is a paid API for AI agents from media.gedx402.com, paid per call via x402, $0.0084/call, status unknown (last checked 2026-09-13).

Transcribes speech from base64-encoded audio files using the Whisper Large V3 Turbo model, paid via USDC on multiple blockchains with no API key required

## Facts

- Endpoint: GET https://media.gedx402.com/v1/asr/whisper-large-v3-turbo
- Price: $0.0084/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 7
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gedx402-whisper-large-v3-turbo-asr-3a4376b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D17CB_R50UHydG3oiBPUf

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 gedx402-whisper-large-v3-turbo-asr-3a4376b4
```

Example prompt: Transcribe this audio clip for me — here's the base64-encoded WAV data: [base64string]. Pay with USDC on Base.

## When to prefer this

Choose this endpoint when you need automatic speech recognition (ASR) without managing API keys, and you are able to pay per-call in USDC on Base, Polygon, Arbitrum, World, or Solana. It is well-suited for agents operating in a crypto-native environment or when avoiding traditional API key provisioning is desirable. It uses the high-quality Whisper Large V3 Turbo model for accurate transcription.

## Known failure modes

- Invalid or malformed base64 audio data returns an error
- Unsupported audio format may fail to decode
- Insufficient USDC balance causes payment failure and 402 response
- Audio too long or too large may exceed processing limits
- Network issues on the selected blockchain can cause payment timeouts

## How this service works

x402 workers ai. pay with usdc on base, polygon, arbitrum, world, or solana. no api keys.

## Output

A JSON object with a 'text' field containing the full transcribed speech from the submitted audio, e.g. {"text": "Transcribed speech."}

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "audio": {
   "type": "string",
   "description": "Base64-encoded audio (WAV, MP3, etc.)."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "Transcribed speech."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gedx402-whisper-large-v3-turbo-asr-3a4376b4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from media.gedx402.com](https://www.zero.xyz/host/media.gedx402.com/llms.txt)