CalendarPipe

A programmable calendar sync service that connects Google Calendar, Outlook, and Apple Calendar through pipes—rules that filter, transform, and route events between them. It solves the problem of calendars not communicating, allowing users to automatically sync specific events while hiding details. It targets developers, operations teams, and individuals (B2B and B2C) who need flexible calendar integration. It is positioned as a developer-extensible yet easy-to-set-up tool, with a free tier for 2 calendars and a $4/month unlimited plan.

Key features

• Visual pipe builder
• Code editor for pipes
• AI-generated pipes
• Filter events by criteria
• Transform event details
• Route events between calendars
• Sync via email invitations
• Hosted calendars for AI agents
• API for calendar creation and booking
• Webhooks and OpenAPI support
• Free tier for 2 calendars
• Unlimited calendars for $4/month