keeper.sh
Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.
Sync and manage events across multiple calendar platforms from one easy-to-use tool.
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Free · no card · unsubscribe anytimeCalendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.
keeper.sh has 1.2k stars on GitHub. It has been forked 39 times. keeper.sh is written mainly in TypeScript. It has been in active development since 2025. keeper.sh is available under the AGPL-3.0 license. Its main topics are bun, caldav, calendar, calendar-sync.
What is keeper.sh?
Calendar sync tool & universal calendar MCP server. Aggregate, sync and control calendars on Google, Outlook, Office 365, iCloud, CalDAV or ICS.
Is keeper.sh open source?
keeper.sh is an open-source project. It is released under the AGPL-3.0 license.
Is keeper.sh free?
Yes. keeper.sh is free and open source — you can use, modify and self-host it. Its AGPL-3.0 license is a strong copyleft: if you distribute a modified version — including offering it as a network service — your changes must be released under the same license.
What license does keeper.sh use?
keeper.sh is available under the AGPL-3.0 license.
What language is keeper.sh written in?
keeper.sh is written mainly in TypeScript.
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