Multi Calendar for ChatGPT

co.lumman/calendar

Outlook.com, Microsoft 365, Google calendars: free time, events, invitations, booking pages, polls.

client:ChatGPT transport:streamable-http

Install Multi Calendar in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://calendar.lumman.co/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs