How do I install Calendar & Reminders MCP Server?

Follow the setup instructions on the Calendar & Reminders GitHub repository, then add the server configuration to your AI client.

What category is Calendar & Reminders MCP Server?

Calendar & Reminders is categorized under Communication. Browse more servers in these categories on MCPgee.

Calendar & Reminders

Name: che-ical-mcp
Author: PsychQuant

v1.0.0•Communication•stable

macOS Calendar & Reminders MCP server with 29 tools — Native Swift EventKit integration for Claude. Attendees/organizer, per-event timezone, undo/redo, --cli mode, --setup TCC, --self-update, signed + notarized binary for macOS 26. Supports iCloud, G

ai-toolsappleautomationcalendarclaude

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What is Calendar & Reminders?

Calendar & Reminders is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to macos calendar & reminders mcp server with 29 tools — native swift eventkit integration for claude. attendees/organizer, per-event timezone, undo/redo, --cli mode, --setup tcc, --self-update, signed +...

This server falls under the Communication category on MCPgee, the world's largest MCP server directory with 33,000+ servers.

Features

macOS Calendar & Reminders MCP server with 29 tools — Native

Use Cases

macOS calendar access

iCloud integration

Event management

PsychQuant

Maintainer

LicenseMIT License

Languageswift

Versionv1.0.0

UpdatedMay 12, 2026

Statushealthy

Maintenanceactive

Works with

ClaudeOpenAIwindowsmacoslinux

View Source Browse All Servers

Installation

Manual Installation

npx che-ical

Configuration

Configuration Details

Config File

claude_desktop_config.json

Performance

Response Metrics

Response Time< 200ms

ThroughputMedium

Resource Usage

Memory UsageLow

CPU UsageLow

How to Set Up and Use Calendar & Reminders

che-ical-mcp is a native Swift MCP server for macOS that provides 29 tools for reading and managing Calendar and Reminders data through Apple's EventKit framework. It supports iCloud, Google Calendar, Exchange, and any other calendar source configured in macOS, and handles attendee/organizer info, per-event timezones, conflict detection, duplicate finding, batch operations, and undo/redo. It is signed and notarized for macOS 14 Sonoma and later, making it safe to run without disabling Gatekeeper.

Prerequisites

macOS 14.0 (Sonoma) or later
Claude Desktop or Claude Code installed on the same Mac
Calendar and Reminders apps configured with your accounts (iCloud, Google, Exchange, etc.)
macOS TCC (Transparency, Consent, and Control) permission granted for Calendar and Reminders access

Download the signed binary

Download the latest pre-built, signed, and notarized CheICalMCP binary from GitHub Releases and place it in your local bin directory.

mkdir -p ~/bin
curl -L https://github.com/PsychQuant/che-ical-mcp/releases/latest/download/CheICalMCP -o ~/bin/CheICalMCP
chmod +x ~/bin/CheICalMCP

Pre-authorize Calendar and Reminders access

Run the --setup flag to trigger macOS TCC permission dialogs for Calendar and Reminders. This must be done interactively before running the server in non-interactive mode (as a background MCP process).

~/bin/CheICalMCP --setup

Configure Claude Desktop

Add the server to your Claude Desktop MCP configuration file. No API keys or environment variables are needed — the server uses native EventKit APIs.

{
  "mcpServers": {
    "che-ical-mcp": {
      "command": "/Users/yourname/bin/CheICalMCP"
    }
  }
}

Configure Claude Code (standalone MCP)

For Claude Code, add the server using the `claude mcp add` command so it is available in all Claude Code sessions.

claude mcp add --scope user --transport stdio che-ical-mcp -- ~/bin/CheICalMCP

Verify access and explore tools

Test the server by asking Claude to list your calendars. The 29 tools cover calendars (list, create, delete, update), events (list, create, update, delete), reminders (8 tools), advanced operations (conflict detection, duplicates, batch operations, copy/move), and undo/redo.

# In Claude, try:
# "List all my calendars and their sources"

Calendar & Reminders Examples

Client configuration

Claude Desktop configuration for che-ical-mcp using the downloaded binary. No env vars required.

{
  "mcpServers": {
    "che-ical-mcp": {
      "command": "/Users/yourname/bin/CheICalMCP"
    }
  }
}

Prompts to try

These prompts exercise the calendar, reminder, and advanced operations tools available in che-ical-mcp.

- "Show my overdue reminders"
- "Create a meeting tomorrow at 2 PM titled 'Team Sync' on my Work calendar"
- "Find any scheduling conflicts in my calendar for next week"
- "Search for all events containing 'project review'"
- "Move all events from 'Old Work' calendar to 'Personal' calendar"
- "Undo the last calendar change I made"

Troubleshooting Calendar & Reminders

Claude cannot see any calendars or events

Run `~/bin/CheICalMCP --setup` in Terminal to trigger the macOS TCC permission dialogs for Calendar and Reminders. You must approve both permissions. If the dialogs don't appear, go to System Settings > Privacy & Security > Calendars and manually add the Terminal or Claude app.

macOS Gatekeeper blocks the binary from running

The binary is signed and notarized, so Gatekeeper should allow it. If you see a security warning, right-click the binary in Finder and choose Open, or run `xattr -d com.apple.quarantine ~/bin/CheICalMCP` in Terminal to remove the quarantine attribute.

Attendee or organizer information is missing from event responses

Attendee and organizer data is returned as read-only information sourced from EventKit. If these fields are empty, the calendar source (iCloud, Google, Exchange) may not be syncing full attendee details to macOS. Check that your calendar accounts are fully synced in the Calendar app.

Frequently Asked Questions about Calendar & Reminders

What is Calendar & Reminders?

Calendar & Reminders is a Model Context Protocol (MCP) server that macos calendar & reminders mcp server with 29 tools — native swift eventkit integration for claude. attendees/organizer, per-event timezone, undo/redo, --cli mode, --setup tcc, --self-update, signed + notarized binary for macos 26. supports icloud, g It connects AI assistants to external tools and data sources through a standardized interface.

How do I install Calendar & Reminders?

Follow the installation instructions on the Calendar & Reminders GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.

Which AI clients work with Calendar & Reminders?

Calendar & Reminders works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.

Is Calendar & Reminders free to use?

Yes, Calendar & Reminders is open source and available under the MIT License license. You can use it freely in both personal and commercial projects.

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Set Up Calendar & Reminders in Your Editor

Choose your AI client for step-by-step setup instructions.

🖥️

Claude Desktop

macOS & Windows app

⌨️

Claude Code

CLI & terminal

📝

Cursor

AI-first code editor

💻

VS Code

GitHub Copilot MCP

🏄

Windsurf

Codeium AI editor

🔌

Cline

VS Code extension

Quick Config Preview

{
  "mcpServers": {
    "che-ical": {
      "command": "npx",
      "args": ["-y", "che-ical"]
    }
  }
}

Add this to your claude_desktop_config.json or .cursor/mcp.json

Read the full setup guide →

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