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ALFRED YouTube Transcript Fetcher (x402)
x402
ALFRED YouTube Transcript Fetcher (x402) is a paid API for AI agents from x402.wallace.us, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).
Fetches the full transcript of a YouTube video given its URL or video ID, paid per-call via Lightning/x402 protocol
Price / call$0.03
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
Returns the full spoken transcript of the specified YouTube video, likely as structured text or a JSON object containing caption segments or a plain text transcript body.
Example use cases
Summarize a YouTube lecture
“Get me the transcript of this YouTube lecture so I can summarize the key points: https://www.youtube.com/watch?v=9bZkp7q19f0”
Fact-check a video's claims
“Pull the transcript from this YouTube video — I want to verify what was actually said: https://youtu.be/abc12345678”
Extract quotes for an article
“Fetch the full text transcript from YouTube video id dQw4w9WgXcQ so I can pull direct quotes for my blog post.”
Technical details
Endpoint
POSThttps://x402.wallace.us/x402/youtube-transcriptWhen to prefer
Choose this endpoint when you need the spoken transcript of a YouTube video and are comfortable with a micro-payment per call via Lightning/x402. Ideal for AI agents that need to process video content as text without running their own transcription pipeline. Prefer this over generic speech-to-text services when the video is already on YouTube and has captions available.
Side effects
- Video has no captions or auto-generated transcript unavailable — returns error or empty result
- Invalid or non-existent video ID/URL — returns error
- Video is private or region-restricted — inaccessible transcript
- Payment not confirmed — HTTP 402 returned with Lightning invoice; must retry with X-Payment-Hash header after paying
- Rate limiting or server-side failure on self-hosted instance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| video | string | (URL or 11-char video id) |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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