# GEDX402 ASR Nova-3 Speech-to-Text

> GEDX402 ASR Nova-3 Speech-to-Text is a paid API for AI agents from ged-x402-media.jvalamis.workers.dev, paid per call via x402, $0.067/call, status unknown (last checked 2026-09-15).

Transcribes audio (WAV, MP3, etc.) to text using the Nova-3 ASR model, paid per-call with USDC on multiple blockchains via x402, no API keys required.

## Facts

- Endpoint: GET https://ged-x402-media.jvalamis.workers.dev/v1/asr/nova-3
- Price: $0.067/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gedx402-asr-nova-3-speech-to-text-ebedf47d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6x89H4cSIK2Rfzytya1pr

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-asr-nova-3-speech-to-text-ebedf47d
```

Example prompt: Can you 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 pay-per-use, keyless speech-to-text transcription using Nova-3 ASR quality and want to pay with USDC on Base, Polygon, Arbitrum, World, or Solana via x402 — no API key registration required, ideal for agents operating autonomously with on-chain micropayments.

## Known failure modes

- Invalid or malformed base64 audio data returns an error
- Unsupported audio format may fail to decode
- Payment failure on selected chain causes 402 rejection
- Network timeout on Cloudflare Workers edge
- Audio too long or too large may exceed limits

## How this service works

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

## Output

Returns a JSON object with a 'text' field containing the transcribed speech as a plain-text string.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "audio": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/gedx402-asr-nova-3-speech-to-text-ebedf47d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ged-x402-media.jvalamis.workers.dev](https://www.zero.xyz/host/ged-x402-media.jvalamis.workers.dev/llms.txt)