get-youtube-video-transcript-mcp
This is an MCP server which grabs transcripts/subtitles as well as the title from YouTube videos using yt-dlp.
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Mizstik
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The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
These names and descriptions are the publisher's own, read from the source code. We print them as written. Our assessment is the findings above, not this list.
get-youtube-video-transcript-and-titleGet transcript and title from a youtube video. In stdio mode, responses longer than 15 KB are split into chunks. If the response starts with '--- Part 1/', call this tool again with chunk=2, chunk=3, etc. to get the remaining parts.
get-youtube-video-commentsGet comments from a youtube video
get-youtube-video-title-onlyGet the title of a youtube video
update-yt-dlpUpdate the underlying yt-dlp executable.
initialize-yt-dlpDownload the yt-dlp executable during first use.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
Tool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
5/5 tools missing one or more hints — get-youtube-video-transcript-and-title (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get-youtube-video-comments (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get-youtube-video-title-only (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +2 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Destructive tools are labelled
1 tool perform destructive updates without destructiveHint — get-youtube-video-transcript-and-title deletes at line 44 (fs.unlink(cachePath))
Add destructiveHint:true to any tool whose handler calls .delete(), .upsert(), .update(), unlink, rm, DELETE, DROP, REPLACE INTO, or any operation that overwrites existing data.
Descriptions match behaviour
1 tool describes read intent but its handler mutates — get-youtube-video-transcript-and-title (line 29: fs.mkdir(CACHE_DIR, { recursive: true }))
Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.
License file
No license file
Add a LICENSE file (MIT, Apache-2.0, etc.).
Tests exist
No test files found
Add tests that exercise each declared tool.
Production dependencies are patched
0 critical, 3 high severity in production deps — @modelcontextprotocol/sdk@1.18.0 (high), @modelcontextprotocol/sdk@1.18.0 (high)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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