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YouTube TranscriptSAFE

mcp/sinco-lab/youtube-transcript-3
MCP server by sinco-lab · captions · claude · cline · Audited 2026-10-08
⚑ Report / re-scanSource ↗

TypeScript MCP server for retrieving YouTube transcripts in Claude Desktop, Cursor, Cline, Codex, and other MCP clients

Verdict
SAFE
Grade
B
Trust score
89 /100
Exposed tools
3 3r · 0w · 0d
Transport
stdio
License
MIT
Stars
39
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

A TypeScript Model Context Protocol server that retrieves YouTube transcripts for Claude Desktop, Cursor, Cline, Codex, and other MCP-compatible clients. It is designed for local npx usage so transcript requests are made from your own machine instead of a remote proxy.

[](https://www.npmjs.com/package/@sinco-lab/mcp-youtube-transcript) [](https://www.npmjs.com/package/@sinco-lab/mcp-youtube-transcript) [](https://github.com/sinco-lab/mcp-youtube-transcript) [](./LICENSE)

Table of Contents

  • Features
  • Getting Started
  • Prerequisites
  • Installation
  • Usage
  • Basic Configuration
  • Docker
  • Testing
  • Troubleshooting and Maintenance
  • Tools
  • Development
  • Contributing
  • License

Features

Key capabilities:

  • Extract transcripts from YouTube videos
  • Support for multiple languages
  • Android InnerTube fallback for current YouTube caption responses
  • Compatible tool names: get_transcripts and get_transcript
  • Timestamped transcript output with get_timed_transcript
  • Video metadata and available transcript languages
  • Format text with continuous or paragraph mode
  • Retrieve video titles and metadata
  • Automatic paragraph segmentation
  • Text normalization and HT
Read from source at commit 0b1a69668cefOBSERVED · 2026-10-08
02

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.

claude-code
claude mcp add mcp-youtube-transcript -- npx -y @sinco-lab/[email protected]
claude-desktop
{
  "mcpServers": {
    "mcp-youtube-transcript": {
      "command": "npx",
      "args": [
        "-y",
        "@sinco-lab/[email protected]"
      ]
    }
  }
}
03

Exposed tools (3)

3 read · 0 write · 0 destructive.

ToolRiskDescription
get_available_languagesread
get_timed_transcriptread
get_video_inforead
04

Trust audit

SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codePASS
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
none-observed
Network
declared (2 observation(s))
Shell
none-observed
Dependencies
not all pinned
Secrets in source
none-found

Findings (1)

LOWSupply chain · supply.unpinned · CWE-829, CWE-1357
package.json
@modelcontextprotocol/sdk, zod, @types/node, typescript
Why it matters. 4 dependency range(s) float
Fix. pin exact versions or ship a lockfile

Gates applied: no_behavioural_pass.

Audited 2026-10-08 · audit v0.4.1 · source sha 0b1a69668ceffull audit observations/trust-audit/mcp-server/sinco-lab__youtube-transcript-3.json · Report an issue / request a re-scan
05

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-080b1a69668cefSAFEB89first audit
06

Questions

What is the YouTube Transcript MCP server?

TypeScript MCP server for retrieving YouTube transcripts in Claude Desktop, Cursor, Cline, Codex, and other MCP clients

What tools does YouTube Transcript expose?

3 in total: 3 read-only, 0 that write, and 0 that can delete or overwrite. Every one is listed on this page with its risk.

Is YouTube Transcript safe to connect to an agent?

The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.

What credentials does YouTube Transcript need?

No credential environment variables were found in its source, so it appears to need none.

How does YouTube Transcript run?

It speaks stdio, so it runs as a local process your client starts. It is published on npm as @sinco-lab/mcp-youtube-transcript at 0.0.12.

How current is this page?

The grade is for one exact copy of the source (0b1a69668cef), read on 2026-10-08. The repository is watched and re-audited when it changes.

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