YouTube Summarizer API: Summaries, Notes and Q&A in Your App

Every video feature built on a language model starts the same way: get the words. TranscriptFetch returns the transcript of any YouTube, TikTok or Instagram link your users paste in, from captions when the video has them and by AI transcription when it does not. Your model turns it into summaries, notes, chapters, quizzes or answers.
Your user pastes a link
A YouTube video or Short, a TikTok, an Instagram Reel, or a direct audio or video file.
Fetch the transcript
One call returns the text with timestamps, plus Markdown with clickable timestamps if you want it ready to drop into a prompt.
Your model does the rest
Summarize it, write chapters from the timestamps, pull quotes, make flashcards, translate it, or answer questions about it. You choose the model and keep the prompt.
Node: a summary of any video link
TranscriptFetch gives you the transcript, which is the hard part: YouTube blocks most servers that fetch captions. Pass it to the model you already use, with your own prompt, and you have a summarizer that works on TikTok and Instagram too.
Most models cannot open a video link, and the ones that try often get blocked. Fetching the transcript first gives the model the full text every time.
Long videos with captions come back in one call. Without captions, AI transcription runs in the background: poll the job or pass callback_url and the finished transcript is posted to you.
Yes. Every line has a timestamp, and the Markdown version links each paragraph to its moment in the video.
Let ChatGPT, Claude, Cursor and your own agents read any video, search YouTube and list whole channels.
Turn whole channels and playlists into a searchable knowledge base, with chunks that link to the exact moment.
Analyze channels, competitors and topics with AI, and watch for new videos as they are posted.
Transcribe new uploads, send summaries to Notion or Slack, and chat with videos in n8n, Zapier or Make.
Every account gets 50 free credits, no card needed. Failed requests are free.
The transcript API for YouTube, TikTok and Instagram.
© 2026 The Casey CompanyRetrieves publicly available video transcripts. Respect creators and each platform's Terms of Service.