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CalendarPipe

CalendarPipe

Programmable calendar sync for humans and AI agents

Website calendarpipe.com
Overview

What it is

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.

Intent

I need it when

Set up calendar synchronization quickly without technical expertise or app installations

CalendarPipe advertises 2-minute setup with no credit card required for the free plan. Events arrive as normal calendar invitations—no app installs or user sign-ups needed on the receiving end, making it accessible to non-technical users.

Prevent double-booking by automatically syncing family calendar events to work calendar

CalendarPipe creates pipes that filter and sync events between Google Calendar, Outlook, and Apple Calendar. Users can set rules to automatically copy family events (like school pickups or doctor visits) to their work calendar, eliminating scheduling conflicts without manual intervention.

Selectively sync calendar events with custom rules (e.g., only weekday events, hide personal details)

CalendarPipe offers visual builder, code editor, and AI-powered rule generation to create custom pipes. Users can filter events by day, duration, keywords, or custom logic, and transform event details before syncing—enabling granular control over what information flows between calendars.

Give AI agents and bots their own calendar for scheduling without accessing user credentials

CalendarPipe's Agentic Hosted Calendars feature spins up a calendar with a real email address and API key. AI agents can book meetings via three API calls, and attendees receive standard email invitations—no OAuth, no user credential access required.

Sync calendars in corporate environments where third-party OAuth is blocked

CalendarPipe's invitation-based delivery works behind corporate firewalls by sending events as standard email invitations rather than requiring OAuth permissions. This bypasses IT restrictions while maintaining full calendar synchronization.

Drop

Not a fit when

  • User needs real-time sync faster than 5 minutes (Pro tier offers 5-minute intervals; Free tier offers 15-minute intervals)
  • User requires on-premises deployment or self-hosted solution (CalendarPipe is cloud-based only)
  • User needs to sync more than 2 calendars on the free plan (limited to 2 connections)
  • User operates in an environment where email-based invitations are blocked or unreliable
  • User requires advanced calendar features beyond filtering and transformation (e.g., resource scheduling, room booking)
Commercials

Pricing

Freemium with paid Pro tier. Free plan includes 2 calendar connections and 1 sync rule. Pro plan ($4/month or $40/year) offers unlimited connections, unlimited rules, 5-minute sync interval, AI-powered rule generation, public API access, and email invitation delivery. View pricing