Syncydo for ChatGPT

com.syncydo/calendar

Read-only view of all your calendars (Google, Outlook, Zoho, iCloud): agenda and free time

client:ChatGPT transport:streamable-http

Install Syncydo in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://app.syncydo.com/mcp

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