Every change Wellknown observed on this MCP server, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Changed the definition of "find_in_transcript", "find_in_videos", "get_account_status" and 13 more
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Find in transcriptbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Find in transcript"}before
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Find in videosbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Find in videos"}before
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Get account statusbefore
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{"destructiveHint":false,"openWorldHint":false,"readOnlyHint":true,"title":"Get account status"}before
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Get spoken contextbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Get spoken context"}before
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Get transcript sectionbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Get transcript section"}before
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Get transcripts batchbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Get transcripts batch"}before
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Get video commentsbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Get video comments"}before
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Get video detailsbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Get video details"}before
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Get YouTube transcriptbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Get YouTube transcript"}before
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Latest from channelsbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Latest from channels"}before
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List channel videosbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"List channel videos"}before
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Rank channels by topicbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Rank channels by topic"}before
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Rank videos by topicbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Rank videos by topic"}before
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Search spoken wordsbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Search spoken words"}before
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Search YouTube videosbefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Search YouTube videos"}before
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Spoken mentions over timebefore
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{"destructiveHint":false,"openWorldHint":true,"readOnlyHint":true,"title":"Spoken mentions over time"}Added "find_in_videos", "get_transcript_section", "get_video_details" and 1 more; changed the definition of "get_transcripts_batch" (12 tools before, 16 now)
Read the transcripts of several videos in one call (up to 5, or 25 on the Ultra plan), each cut to a length you choose ⟨34 unchanged words⟩
⟨34 unchanged words⟩ URLs or 11-character video IDs (up to 5, or 25 on the Ultra plan; get_account_status shows the limit for this key).","items":{"type":"string"},"maxItems":525,"type":"array"}},"required":[ ⟨3 unchanged words⟩
Certificate changed, valid to 2027-02-05
Added "get_account_status"; changed the definition of "list_channel_videos" (11 tools before, 12 now)
⟨21 unchanged words⟩ who looks credible, or to cover a playlist. Returns at most 50 videos per call; to go further, call again with offset set to the number of videos already read (the result ends with the offset to use). Reaches up to the first 500 videos.
⟨24 unchanged words⟩ 50,"minimum":1,"type":"integer"},"offset":{"description":"Optional. How many videos to skip, to read the next page. Use the value given at the end of the previous result. Default 0.","maximum":499,"minimum":0,"type":"integer"}},"required":["channel"],"type":"object"}
Added "get_spoken_context", "rank_channels_by_topic", "rank_videos_by_topic" and 2 more (6 tools before, 11 now)
Read what was said around a moment in a video: the sentences before and after a timestamp. Use it after search_spoken_words to see what a matching sentence was part of, before you quote or rely on it. Works for videos in the library only.
Find which channels talk about something the most, ranked by mentions, with how many of their videos mention it. Use it to find who covers a topic: creators to follow, experts, or partners. Same library, caption quirks and dates as search_spoken_words.
Find the videos that talk about something the most, ranked by how many sentences mention it. Better than searching titles when you want the videos that really go deep on a topic. Each result has the number of mentions, the first mention and a link. Read the best ones with get_youtube_transcript or find_in_transcript. Same library, caption quirks and dates as search_spoken_words.
Search what people actually say inside YouTube videos. Full-text search over about 100 million spoken sentences from about 425,000 English-language videos (the ones users looked up on youtube-transcript.ai), with typically 1 to 8 million new sentences added every day. Returns matching sentences, each with the video, channel and a link that opens the video at that moment. Use it to find evidence and quotes, to see how people talk about a topic, product or phrase, or to find which videos mention something. Captions are auto-generated and often mis-hear names (for example "Claude Code" is often …
Added "find_in_transcript", "get_transcripts_batch", "get_video_comments" and 2 more (1 tools before, 6 now)
Find where a video talks about something. Give one or more keywords and get back only the matching passages, each with a timestamp and a link that opens the video at that moment. Far cheaper than reading the whole transcript when you are looking for specific points. Matching is a case-insensitive text match, so try synonyms and spelling variants (auto-captions often mis-hear names).
Read the transcripts of several videos in one call (up to 5), each cut to a length you choose, so you can skim a set of search results without filling your context. Each video counts as one request against your daily quota. For the rest of a long video use find_in_transcript or get_youtube_transcript.
Fetch the top comments of a YouTube video (YouTube's "top" ordering, replies not included), with like counts. Comments are where viewers report what worked for them, which makes them useful for checking claims made in the video.
Changed the definition of "get_youtube_transcript"
⟨38 unchanged words⟩ language code to select a specific caption track. Very long transcripts (multi-hour videos) come back in parts of up to 120,000 characters: when there is more, the result ends with a note giving the offset to pass on the next call.
⟨18 unchanged words⟩ default track.","type":"string"},"offset":{"description":"Optional. Character position to continue a long transcript from. Use the value given in the note at the end of the previous part. Omit to start from the beginning.","minimum":0,"type":"integer"},"video":{"description":"YouTube video URL or ⟨9 unchanged words⟩
Certificate changed, valid to 2027-01-02
Certificate recorded, valid to 2026-12-08
Authorization not required
First tool surface recorded: 1 tool (server version 1.0.0)
Showing the latest 11 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
Search several videos for the same keywords in one call and get back only the matching passages, grouped by video, plus which videos never mention them. Use it to check a set of search results or a channel's latest uploads for a topic without reading them all. Up to 5 videos per call, or 25 on the Ultra plan; each video counts as one request.
Read only part of a transcript, between two timestamps, e.g. one chapter of a long podcast or the ten minutes around a moment found with find_in_transcript. Much smaller than the full transcript.
Get the facts about one video without its transcript: title, channel, views, length, publish date, which caption languages exist (human-made or auto-generated), the full description, and the chapter list with a link to each chapter. Use it to decide whether a video is worth reading, to find the right lang code, or to read one chapter at a time with get_transcript_section.
See what several channels uploaded most recently, in one call: the newest videos of each channel, newest first. Use it as a watchlist ("anything new from these creators?"), then skim the new videos with get_transcripts_batch or check them for a topic with find_in_videos. Up to 5 channels per call, or 25 on the Ultra plan; each channel counts as one request.
Show the plan of the API key on this connection (Free or Pro), the daily request quota, how many requests were used today, how many remain, when the quota resets, and the per-call limits of the tools. Free: it does not use any quota. Call it before a large job to check the quota is enough.
Count how often something is mentioned over time, by day, week or month. Each period shows the mentions and the rate per million spoken sentences, so busy and quiet periods compare fairly. Use it to see whether a topic is rising or fading. The date is when we captured the captions, not when the video was published, and the first day (2026-09-13) holds a one-off backfill of earlier captions, so compare the rate, not the raw count, and be careful with that first period.
List the latest videos of a YouTube channel or playlist, with view count and duration. Use it to follow a creator who looks credible, or to cover a playlist.
Search YouTube and return matching videos with channel, view count and duration. Use it first when researching a topic: run several differently-worded queries (and in more than one language), then read the best hits with get_youtube_transcript, find_in_transcript or get_transcripts_batch. Optional filters on views and length.