Duobox for Gemini CLI

io.duobox/mail

Business email on your domain for AI agents: read, draft and send with the permissions you choose.

client:Gemini CLI transport:streamable-http

Install Duobox in Gemini CLI

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

{
  "mcpServers": {
    "mail": {
      "httpUrl": "https://mcp.duobox.io/v1/mcp"
    }
  }
}

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