YouTube Transcript API No Captions
Use TubeScript on public YouTube videos without captions through AI fallback, with clear limits for long or restricted videos.
Direct answer
The real endpoint is https://tubescript.cc/v1/transcript. API access is included with the Team plan.
YouTube Transcript API No Captions
When a public YouTube video has no usable captions, TubeScript can fall back to AI audio transcription. This path is slower, uses Gemini capacity, and is currently limited to videos up to 1 hour.
curl -X POST https://tubescript.cc/v1/transcript \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"url":"https://youtube.com/watch?v=VIDEO_ID_WITH_NO_CAPTIONS","language":"en","stream":false}'Captions are always first
TubeScript uses manual captions first, then YouTube auto captions, then AI audio transcription only when no usable captions exist.
AI fallback has stricter limits
No-caption videos may be slower, may fail if the video is restricted, may fail during temporary AI quota exhaustion, and are capped at 1 hour for AI fallback.
Captioned long videos should avoid AI
If a long video has usable captions, the request should use captions and avoid the no-caption AI limit. The long-video risk is mainly for videos with no usable captions.
Build on the transcript engine
Team includes API keys, JSON transcript access, cache-backed reads, and 100 API requests per day.
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