Gemini CLI captapi youtube_comments

How to: Gemini CLI captapi youtube_comments

client:Gemini CLI transport:streamable-http tool:youtube_comments

Add captapi to Gemini CLI

01
Open ~/.gemini/settings.json and merge this in. Keep any servers already there.

{
  "mcpServers": {
    "captapi": {
      "httpUrl": "https://api.captapi.com/mcp"
    }
  }
}

02
Save the file and restart Gemini CLI.
03
Ask for something youtube_comments does. Gemini CLI lists the server's tools on connect and calls youtube_comments itself — you do not invoke it by name.
04
If nothing happens, check the server is running and that captapi's identifier in your config matches the one above exactly.

Gemini expands $VAR and ${VAR} inside env values, so a secret can live in your shell rather than this file. Gemini CLI docs

Set these first

captapi will not start until these are set, so youtube_comments never becomes available.

CAPTAPI_API_KEY
CAPTAPI_BASE_URL

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.

captapi MCP server