Gemini CLI

Castle MCP by usefulapi for Gemini CLI

io.usefulapi/castle

Investigate security events and manage the allow/deny lists an analyst acts on.

client:Gemini CLI transport:streamable-http tools:14

Install Castle MCP by usefulapi in Gemini CLI

~/.gemini/settings.json · windows: %USERPROFILE%\.gemini\settings.json

{
  "mcpServers": {
    "castle": {
      "httpUrl": "https://castle.usefulapi.io/mcp"
    }
  }
}

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

What Gemini CLI can do once it is connected

Castle MCP by usefulapi in other clients

Castle MCP by usefulapi MCP server