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ALFRED x402 Audio Transcription
x402
ALFRED x402 Audio Transcription is a paid API for AI agents from x402.wallace.us, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).
Transcribes audio from a URL into text, paid per-call via Lightning/x402 protocol at $0.50 USDC
Price / call$0.5
Success—
StatusUnknown
How this service works
Self-hosted personal-assistant paid tools via Lightning. Uses x402-shaped protocol (L402 lineage): HTTP 402 with a Lightning invoice in the response body + WWW-Authenticate header, retry with X-Payment-Hash: <hex> once paid. Results cached per payment_hash so legitimate retries don't cost twice.
Output
A JSON object containing the transcribed text derived from the audio file at the provided URL. Results are cached per payment hash so retrying after a successful payment returns the same transcript without additional charges.
Example use cases
Example prompt
“Can you transcribe the audio at https://example.com/meeting-recording.mp3 into text for me?”
Technical details
Endpoint
POSThttps://x402.wallace.us/x402/transcribeWhen to prefer
Choose this endpoint when you need audio-to-text transcription and are operating in a Lightning/x402 micropayment context, or when you want a self-hosted solution rather than a major cloud provider. At $0.50 USDC per call it is cost-effective for occasional transcription. Prefer this over cloud alternatives when privacy or decentralized payment is a priority.
Side effects
- Invalid or inaccessible audio URL — endpoint cannot fetch or decode the file
- Payment not completed — HTTP 402 returned with Lightning invoice; must pay and retry with X-Payment-Hash header
- Unsupported audio format — file format not recognized by the transcription backend
- Audio file too large or too long — may time out or return an error
- Stale or expired Lightning invoice — payment window passed, must request a new invoice
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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