Keeper.sh

Calendar sync tool and universal calendar MCP server

ServiceEmergingAccount requiredfreemiumglobal

A simple open-source calendar syncing service that pulls events from major calendar providers and pushes them to one or more calendars to keep busy times aligned. It helps prevent double-booking for people who use multiple calendar accounts, can be self-hosted, and includes a global MCP server/API for managing calendars from automated agents; offered as a freemium service.

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