Google Calendar
Google calendars connect to Multi Calendar with Google sign-in, so Lumman never receives your password.
For Gmail and Google Workspace accounts.
Add it to
- 1Add to ClaudeOpens claude.ai - press Connect there.
- 2
Sign in, choose Google Calendar and allow access at Google in the window Claude opens. That adds your calendar and approves Claude in one step.
- 3
Ask Claude about your week
- 1
Run in Claude Code
/plugin marketplace add lumman-lab/multi-calendar/plugin install multi-calendar@multi-calendarRun the first, then the second.
- 2
Sign in, choose Google Calendar and allow access at Google on the Lumman page your browser opens. That adds your calendar and approves Claude Code in one step. If none opens, run /mcp and choose multi-calendar.
- 3
Ask, or run
/multi-calendar:week
Needs ChatGPT Pro, Business, Enterprise or Edu. Plus and Free cannot add it.
- 1
Copy the address
- 2Open ChatGPT plugins
Press +, choose Add custom MCP server, name it Multi Calendar, paste the address, choose OAuth, tick the box and press Create as a plugin.
- 3
Install it, then sign in, choose Google Calendar and allow access at Google on the Lumman page it opens. That adds your calendar and approves ChatGPT in one step. In a chat, type @ and choose Multi Calendar.
- 1
Add to
~/.cursor/mcp.json - 2
Sign in, choose Google Calendar and allow access at Google on the Lumman page Cursor opens. That adds your calendar and approves Cursor in one step.
Streamable HTTP, OAuth 2.1 with dynamic client registration. No key or client id.
- VS Code
Run MCP: Add Server, choose HTTP, paste the address and name it multi-calendar.
- Gemini CLI
gemini extensions install https://github.com/lumman-lab/multi-calendarIts first call opens Lumman's sign-in; /mcp auth multi-calendar opens it again.
- Antigravity
agy plugin install https://github.com/lumman-lab/multi-calendarRun /mcp, open multi-calendar_multi-calendar and choose Authenticate; approve on the Lumman page, then paste the code Antigravity shows back into it.
Free for every calendar you have. Any number of booking pages and circles for $50 a year or $5 a month.
Limits
- Leave every permission ticked on Google's screen - an account short of one is not connected.
- A Gmail account makes no out of office or focus time. A Google Workspace account makes them in its main calendar, where its edition offers them.
Connection
- Reached through
- Google Calendar API
- Permissions
- openid, email, calendar.calendarlist.readonly, calendar.events
Your data
- Stored
- Google's credential, encrypted under a key held outside the database
- Calendars
- No copy kept - read from the calendar on each call
- Removing it
- Disconnecting withdraws Lumman's access at Google too.
Tools
- Offered
- All 21
Everything else
Multi Calendar's address, sign-in, limits and every tool: Multi Calendar's technical details.