macOS Calendar and Reminders MCP server

che-ical-mcp

Give Claude native control of macOS Calendar and Reminders. A Swift MCP server built directly on EventKit — 29 tools for events, reminders, tags, batch operations, conflict detection, and undo/redo. Not just calendar events: it drives Reminders and tasks too.

English | 繁體中文

Install

Claude Code — register this repo as a marketplace, then install the plugin. The plugin bundles the /today, /week, /quick-event, /remind slash commands and a PreToolUse hook that verifies day-of-week on every event write:

claude plugin marketplace add PsychQuant/che-ical-mcp
claude plugin install che-ical-mcp@che-ical-mcp

Claude Desktop — download the latest .mcpb from Releases and double-click to install.

Standalone MCP — the 29-tool server on its own, no plugin extras:

mkdir -p ~/bin
curl -L https://github.com/PsychQuant/che-ical-mcp/releases/latest/download/CheICalMCP -o ~/bin/CheICalMCP && chmod +x ~/bin/CheICalMCP
claude mcp add --scope user --transport stdio che-ical-mcp -- ~/bin/CheICalMCP

On first use, macOS prompts for Calendar and Reminders access — click Allow. Building from source, upgrading in place, or running under SSH / launchd / VS Code? See Installation for the full guide.

Why che-ical-mcp?

All 29 Tools

Calendars (4)

Events (4)

Recurrence exclusions (#182): createevent (and each createeventsbatch item) accepts recurrence.excludedoccurrence_dates to skip specific dates in a recurring series at creation time — applied with best-effort all-or-nothing semantics (any failure removes the entire new series via compensating delete; rollback failure is reported, never silent; the first occurrence cannot be excluded), and one undo removes the whole series including exclusions. Known limitation: on idempotent retry, a duplicate recurring series with every requested date already absent is skipped, but extra exclusions already present on the existing series (beyond those requested) are not detected.

Shortened. The full README is on GitHub.