thunderbird-cli

thunderbird-cli is a local MCP server: Give AI agents full read/write email access via Mozilla Thunderbird. Zero credentials. Install it from npm as thunderbird-cli-mcp.

Claude CodeCodexAntigravity

commandprompt

Terminal

claude mcp add thunderbird-cli -e TB_BRIDGE_HOST=... -e TB_BRIDGE_PORT=... -- npx -y thunderbird-cli-mcp

Run in your project folder. Add --scope user to use it everywhere.

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "thunderbird-cli": {
      "command": "npx",
      "args": [
        "-y",
        "thunderbird-cli-mcp"
      ],
      "env": {
        "TB_BRIDGE_HOST": "...",
        "TB_BRIDGE_PORT": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

• Runtime: Node.js 18+ (runs with npx).
• MCP client: Claude Code, Codex, Antigravity, Claude Desktop, Cursor or any other client that speaks MCP over stdio.
• Environment variables: TB_BRIDGE_HOST, TB_BRIDGE_PORT