Calendar MCP Server

Calendar app MCP for accessing macOS Calendar events and reminders

Local serverstdioPython

What is the Calendar MCP server?

Most planning and project tracking work still happens through a UI a human drives. Calendar MCP server moves it into the conversation instead. Calendar app MCP for accessing macOS Calendar events and reminders.

The short version

An MCP (Model Context Protocol) server that provides access to macOS Calendar.app events and reminders for use with Claude and other AI assistants.

  • Access macOS Calendar.app events and reminders
  • Filter by date range, calendar names, and all-day/busy status
  • Format output as JSON or Markdown
  • Secure, local access to calendar data

The tools it exposes

The server publishes 11 tools. What each one is for:

  • get_events — Retrieve events for a specific date range
  • get_reminders — Retrieve reminders for a specific date range
  • list_calendars — List all available calendars
  • get_today_summary — Get a summary of today's events and reminders
  • search — Search for events and reminders containing a specific term
  • get_current_time — Get the current date and time in any timezone
  • convert_time — Convert a time from one timezone to another
  • list_timezones — List available timezones, optionally filtered by region
  • Tools — The Tools tool exposed by this server
  • Resources — The Resources tool exposed by this server
  • Prompts — The Prompts tool exposed by this server

Getting it running

Installation goes through your MCP client rather than a global install: point it at calendar-app-mcp on PyPI and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.

How it compares

Among the planning and project tracking options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. Calendar's toolset — get_events, get_reminders, list_calendars and 8 more — is a fair guide to whether it matches your workflow.

This entry was verified against Calendar's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.

Things to watch

  • It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
  • With 11 tools registered it takes up a noticeable share of the context window; turn it off in projects that never touch Calendar.
  • Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.

Available tools

ToolWhat it does
get_eventsRetrieve events for a specific date range
get_remindersRetrieve reminders for a specific date range
list_calendarsList all available calendars
get_today_summaryGet a summary of today's events and reminders
searchSearch for events and reminders containing a specific term
get_current_timeGet the current date and time in any timezone
convert_timeConvert a time from one timezone to another
list_timezonesList available timezones, optionally filtered by region
ToolsThe Tools tool exposed by this server.
ResourcesThe Resources tool exposed by this server.
PromptsThe Prompts tool exposed by this server.

How to install the Calendar MCP server

{
  "mcpServers": {
    "calendar-app": {
      "command": "uvx",
      "args": ["calendar-app-mcp"]
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Example prompts to try

  • Use Calendar to get events.
  • Use Calendar to get reminders.
  • Use Calendar to list calendars.

Frequently asked questions

It connects Calendar to MCP-compatible AI assistants such as Claude and Cursor, exposing 11 tools (get_events, get_reminders, list_calendars, and more) that the assistant can call on your behalf. Instead of copying data back and forth by hand, the assistant works with Calendar directly.