CalendarPipe
Create pipes to filter, transform, and sync events between Google Calendar, Outlook, and Apple Calendar. Build visually, describe in plain English, or write code.
CalendarPipe launched on April 17, 2026 with 155 votes, #205 of 21,248 launches that month and more than 99% of that year's launches.
What it does
CalendarPipe syncs Google, Outlook, and Apple calendars through programmable pipes that filter, transform, and route events. Build pipes visually, describe them in plain English with AI, or write TypeScript. Events flow as real invitations — no OAuth needed on the recipient side. AI agents get a REST API, CalDAV, and MCP server to spin up their own calendars and send invites.
CalendarPipe is a programmable calendar sync service that connects Google Calendar, Outlook, and Apple Calendar through pipes — rules that filter, transform, and route events between them. Free forever for 2 calendars; $4/month for unlimited. Your partner adds “Pediatrician 3pm” to the family calendar. CalendarPipe copies it to your work calendar automatically — so you never double-book over school pickups, doctor visits, or the afternoon you're on kid duty. Events arrive as normal calendar invitations. No installs, no permissions, no “can you sign up for this app?” conversations. Transform to "Personal commitment" . Deliver as invitation . Works behind corporate firewalls too. When IT…from calendarpipe.com
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