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Fly Labs YouTube Transcript API
x402
Fly Labs YouTube Transcript API is a paid API for AI agents from flylabs.fun, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-10).
Fetches the full text transcript of a YouTube video given its URL or video ID, paid per-call via USDC on Base.
Price / call$0.03
Success—
StatusUnknown
How this service works
pay-per-call apis for ai agents. usdc on base via x402. no keys, no signup, no rate limits. youtube transcripts $0.03, engagement $0.02. free tools for solo builders too.
Output
Returns a JSON object containing the transcript text, detected language code, word count, duration in seconds, the resolved video ID, and a source field indicating how the transcript was obtained (e.g. youtube_subs).
Example use cases
Example prompt
“Can you get me the full transcript of this YouTube video: https://www.youtube.com/watch?v=dQw4w9WgXcQ?”
Technical details
Endpoint
GEThttps://flylabs.fun/api/agents/transcribe?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs the spoken content of a YouTube video as text, without requiring an API key or account setup. It is ideal for lightweight, pay-per-call workflows where the agent needs to summarize, analyze, or quote video content. Prefer this over speech-to-audio-transcription services when the video already has captions/subtitles, as it is faster and cheaper at $0.03 per call.
Side effects
- Video has no captions or subtitles available — returns an error or empty transcript
- Invalid or malformed YouTube URL/video ID — returns a 4xx validation error
- Video is private or age-restricted and captions cannot be accessed
- Network or upstream YouTube availability issue causing timeout or 5xx error
- Payment failure or insufficient USDC balance preventing the x402 call from completing
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | Full YouTube URL (watch, shorts, youtu.be, embed). |
| videoId | string | 11-character YouTube video ID. |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "youtube_subs",
"videoId": "dQw4w9WgXcQ",
"transcript": {
"text": "...",
"language": "en",
"wordCount": 1234,
"durationSec": 212
},
"schema_version": "1.0"
}
}Tags
x402
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