Connect your mailboxes and calendars to Gemini CLI
Install Multi Mail and Multi Calendar in Gemini CLI as extensions, one command each, then approve each on the Lumman page your browser opens.
The AI apps' own connectors
- The Google Workspace extension for Gemini CLI searches, reads, drafts, sends and labels Gmail, lists, creates, updates and answers Calendar events and finds free time. Read on 13 November 2026.
Connect it
Multi Mail
Gmail, Outlook.com, Hotmail, Microsoft 365, Yahoo, iCloud and other mailboxes, in one connector.
- 1
Run in a terminal and confirm the install
gemini extensions install https://github.com/lumman-lab/multi-mail - 2
Sign in, add your mailbox and approve Gemini CLI on the Lumman page your browser opens when Gemini CLI next starts. If none opens, run /mcp auth multi-mail.
Multi Calendar
Your Outlook.com, Microsoft 365, Google, iCloud and other calendars, in one connector.
- 1
Run in a terminal and confirm the install
gemini extensions install https://github.com/lumman-lab/multi-calendar - 2
Sign in, add your calendar and approve Gemini CLI on the Lumman page your browser opens when Gemini CLI next starts. If none opens, run /mcp auth multi-calendar.
Reach and limits
- Search and read every mailbox you add at once, and draft, reply, forward and send from any of them.
- Archive, bin and file mail, and clean up an inbox by sender, putting back what a clean-up moved.
- Find free time across every calendar you add, and create, move and cancel events.
- Share booking links and a booking page, run group polls, and find a time with the people in a circle.
If it refuses
- Gemini CLI's site says Antigravity CLI replaced it for unpaid-tier and Google One users on 18 June 2026. Read on 13 November 2026.
- Gemini CLI's Enterprise Admin Controls page says MCP servers and extensions stay off for enterprise users until an admin enables them, and an admin's allowlist ignores every other server. Read on 13 November 2026.