Capslane gives developers a stable API for YouTube transcripts. It returns native captions when available and automatically generates a timestamped transcript when they are missing. Get plain text or structured segments, choose a language, manage API keys, inspect usage, and connect through JavaScript, Python, MCP, or n8n. Start with 50 free requests each month.
Capslane Reviews
The community submitted 3 reviews to tell us what they like about Capslane, what Capslane can do better, and more.
4.5
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Thanks for the detailed feedback! Completed transcript responses already include a source field: "native" for captions retrieved from YouTube, or "generated" for Capslane’s audio transcription. But your feedback makes us think we could make that much clearer in our examples.
Your point about accuracy is also fair: native captions can themselves be auto-generated by YouTube, so provenance alone doesn’t guarantee accuracy. We don’t currently expose a confidence score. Distinguishing creator-provided captions from YouTube auto-captions would be a useful next improvement.