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post/youtube/v1/transcript1 credit
video transcript/captions (timed segments + full text) select any language the video has via 'lang'; format=text|segments
Working example
Parameters
YouTube video id (11 chars) or any watch/youtu.be/shorts/embed URL.
Preferred caption language code (e.g. en, es, de). Falls back to an available track; see available_languages in the response.
Output shape. 'text' omits the per-cue segments[] array.
request preview
curl -X POST https://api.reefapi.com/youtube/v1/transcript \
-H "x-api-key: $REEF_KEY" \
-H "content-type: application/json" \
-d '{"video_id":"dQw4w9WgXcQ","lang":"en"}'Hit Send to run this endpoint live.