mcp-youtube-transcript (of3y/mcp-youtube-transcript) is an MCP server listed on the M8ven Trust Index. It scores 35 out of 100, grade F. It declares 46 tools. No publisher has claimed this listing.

F
Warning
35/100

mcp-youtube-transcript

Extracts YouTube transcripts and performs AI-powered video analysis for Claude Desktop, enabling transcript retrieval, quality analysis, and smart resource management.

Warning. Serious findings were identified. Review the full report before connecting. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.

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⚡ Live Monitored: not connected

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Who stands behind it

of3y

Source: Glama

Is this your MCP?

Claim it to get a verified publisher badge, a free copy of our full audit findings, and direct contact for any high-priority issues we find. Or connect your repo for our deepest verification, Live Monitored: read-only, revoke anytime. What we access →

Install from

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.

// key findings
⚠️
Tool descriptions don’t match what handlers do
1 tool describes read intent but its handler mutates — get_youtube_transcript_ytdlp (line 583: shutil.rmtree(temp_dir))
No credential exfiltration, no sensitive file access, no obfuscation
Static analysis found nothing flowing your secrets to unexpected places.
🔐
You'll be asked for 2 credentials: ANTHROPIC_API_KEY, OPENAI_API_KEY
These are read from process.env at runtime. Make sure you trust where they’ll be sent.
// environment variables
To run this server yourself, you supply these values. They go in your own MCP client configuration and stay on your machine. The secret label means the value is sensitive, not that the server mishandles it.
🔐 secretANTHROPIC_API_KEY
🔐 secretOPENAI_API_KEY
configYT_DEFAULT_LANG
configYT_MAX_COMMENTS
configYT_COMMENT_SORT
configYT_ENABLE_REPLIES
configYT_MAX_REPLIES
configYT_OUTPUT_DIR
configYT_TIMEOUT
configYT_AGGRESSIVE_DEDUP
configLOG_LEVEL
configCACHE_SIZE
configDEFAULT_LANGUAGE
configMAX_OUTPUT_CHARS
configENABLE_SMART_TRUNCATION
configAGGRESSIVE_DEDUP
// quality suggestions

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

46/46 tools missing one or more hints — create_mcp_resource_from_transcript_v2 (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_transcript_quality_analysis (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_youtube_transcript (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +43 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_transcript_ytdlp deletes at line 583 (shutil.rmtree(temp_dir))

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_transcript_ytdlp (line 583: shutil.rmtree(temp_dir))

Rename the tool, rewrite the description, or move the side-effect into a separate clearly-named tool.

Tool inputs are validated

33/46 tool handlers declare input schemas (72%)

Declare an inputSchema with zod/joi/yup on every tool definition.

Tool handlers catch errors

29/46 tool handlers wrap calls in try/catch (63%)

Wrap each tool handler body in try/catch and return a structured error response.

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.

Tool description accuracy

get_youtube_transcript_ytdlp: description implies read-only but handler writes/deletes/executes

Update tool descriptions to accurately reflect all capabilities — especially write, delete, or execute operations.

Claim the listing to review these findings one by one and send us a correction where you disagree, straight to the team. Claiming also means we tell you when the grade moves, and reach you first if we find anything urgent.

// full audit trail
The findings above are the summary. The full trail, every check we ran, each deduction, the network hosts observed and the dependency advisories, goes to verified publishers, along with an alert whenever a new one lands. Verified publishers can also review each finding and dispute it in one click. Publisher corrections have sharpened several of our checks this month, because the maintainer knows the codebase better than any scanner.
// improvement guidance — verified publishers only
We have 9 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.
// embed badge in your README
[![M8ven Verified](https://m8ven.ai/badge/mcp/of3y/mcp-youtube-transcript?variant=verified)](https://m8ven.ai/mcp/of3y/mcp-youtube-transcript)
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commit: d87fa95ebe245ef92fe7255f2ae859f964e4fb68
code hash: c66abc32b9618badea93e1355187fa01cd664b1de734deaeca2aa7de0e6ca5da
view raw JSON →
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