Add YouTube Transcript

This skill adds YouTube transcript extraction capability to Deus via an MCP server. Once installed, the agent can fetch captions and subtitles from any YouTube video using the get_transcript tool.

Phase 1: Pre-flight

Check if already configured

Check if .mcp.json already has a youtube-transcript entry:

cat .mcp.json 2>/dev/null

If youtube-transcript is already present, inform the user it's already installed and skip to Phase 3 (Verify).

Phase 2: Install and Configure

Install the MCP server package

npm install --save-dev @kimtaeyoon83/mcp-server-youtube-transcript

Configure MCP

Read the current .mcp.json and add the youtube-transcript server entry. The final .mcp.json should include:

{
  "mcpServers": {
    "youtube-transcript": {
      "command": "npx",
      "args": ["-y", "@kimtaeyoon83/mcp-server-youtube-transcript"]
    }
  }
}

If .mcp.json already has other servers configured, merge the new entry — do not overwrite existing servers.

Build

npm run build

Phase 3: Verify

Test the MCP server starts

npx @kimtaeyoon83/mcp-server-youtube-transcript --help 2>&1 || echo "Server binary accessible"

Tell the user:

YouTube transcript extraction is now available. The agent can fetch captions from any YouTube video.

Usage: Ask the agent to get a transcript from a YouTube URL, or use the get_transcript tool directly with a video URL or ID.

Supported options:

• url — YouTube video URL or video ID
• lang — Language code (default: "en", e.g., "ko", "he", "es")

Removal

To remove YouTube transcript support:

1. Remove the MCP server entry from .mcp.json:

   # Edit .mcp.json and remove the "youtube-transcript" key from mcpServers
   

2. Uninstall the package:

   npm uninstall @kimtaeyoon83/mcp-server-youtube-transcript
   

3. Rebuild:

   npm run build