MCP iCal Server
About
Mcp server with singular tool communication to agent using o4-mini with OpenAI Agent SDK integration to manage google/apple calendar.
Details
- License
- MIT
Explore
- Custom calendar selection
- Location and notes
- Smart reminders
- Recurring events
- Time and date modifications
- Calendar transfers
- Location updates
- Note additions
- Reminder adjustments
- Recurring pattern changes
Setting up with Highlight
This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:
- Download and install Highlight from highlightai.com/download
- Navigate to the plugins tab and select "Add Custom Plugin"
-
Configure the plugin with the settings below
Plugin Name
MCP iCal ServerCommand (node, npx, python, etc.)Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
- Enable "Start Automatically" if you want the plugin to start when Highlight launches
From the repository
- uv package manager
- macOS with Calendar app configured
- An MCP client - Claude for desktop is recommended
- OpenAI API key (set as OPENAI_API_KEY environment variable)
> 💡 Note: While these instructions focus on setting up the MCP server with Claude for Desktop, this server can be used with any MCP-compatible client. For more details on using different clients, see the MCP documentation.
uv sync
2. Configure Claude for Desktop with API Key
Create or edit ~/Library/Application\ Support/Claude/claude_desktop_config.json and include your OpenAI API key as an environment variable:
{
"mcpServers": {
"mcp-ical": {
"command": "uv",
"args": [
"--directory",
"/ABSOLUTE/PATH/TO/PARENT/FOLDER/mcp-ical",
"run",
"mcp-ical"
],
"env": {
"OPENAI_API_KEY": "your-api-key-here"
}
}
}
}
3. Launch Claude for Calendar Access
> ⚠️ Critical: Claude must be launched from the terminal to properly request calendar permissions. Launching directly from Finder will not trigger the permissions prompt.
/Applications/Claude.app/Contents/MacOS/Claude
4. Start Using!
Try: "What's my schedule looking like for next week?"
```
> 🔑 Note: When you first use a calendar-related command, macOS will prompt for calendar access. This prompt will only appear if you launched Claude from the terminal as specified above.
uv sync --dev
Claude Desktop / Cursor
Paste into your MCP client config file to install this server.
{
"mcpServers": {
"mcp ical server": {
"Mcp_calender_agent": {
"command": "uv",
"args": [
"sync"
]
}
}
}
}McpServers
{
"Mcp_calender_agent": {
"command": "uv",
"args": [
"sync"
]
}
}<div align="center">
🗓️ Agent-Powered Calendar Management for macOS
</div>
> This project is based on Omar-V2/mcp-ical with a reimplemented user interaction layer using an agent-based approach.
🌟 Overview
Transform how you interact with your macOS calendar using a dedicated AI agent! This MCP iCal server leverages the OpenAI Agent SDK to provide a single, powerful entry point for all your calendar operations.
Unlike traditional MCP implementations that expose multiple tools, this server uses an agent-based approach:
- 🧠 Single Tool Interface: Just one MCP tool (send_to_calendar_agent) that delegates to a specialized calendar agent
- 🤖 Stateful Conversations: The agent maintains context between requests in the same session
- 🔄 Zero-Config Operation: Natural language processing handled automatically by the specialized agent
You: "What's my schedule for next week?"
Claude: "Let me check that for you..."
[Calendar agent processes request and returns clean schedule]
You: "Add a lunch meeting with Sarah tomorrow at noon"
Claude: "Event created: Lunch with Sarah, tomorrow at 12:00 PM"
✨ Features
📅 Event Creation
Transform natural language into calendar events instantly!"Schedule a team lunch next Thursday at 1 PM at Bistro Garden"
↓
📎 Created: Team Lunch
📅 Thursday, 1:00 PM
📍 Bistro Garden
Supported Features:
- Custom calendar selection - Location and notes - Smart reminders - Recurring eventsPower User Examples:
🔄 Recurring Events:
"Set up my weekly team sync every Monday at 9 AM with a 15-minute reminder"
📝 Detailed Events:
"Schedule a product review meeting tomorrow from 2-4 PM in the Engineering calendar,
add notes about reviewing Q1 metrics, and remind me 1 hour before"
📱 Multi-Calendar Support:
"Add a dentist appointment to my Personal calendar for next Wednesday at 3 PM"
🔍 Smart Schedule Management & Availability
Quick access to your schedule with natural queries:"What's on my calendar for next week?"
↓
📊 Shows your upcoming events with smart formatting
"When am I free to schedule a 2-hour meeting next Tuesday?"
↓
🕒 Available time slots found:
• Tuesday 10:00 AM - 12:00 PM
• Tuesday 2:00 PM - 4:00 PM
✏️ Intelligent Event Updates
Modify events naturally:"Move tomorrow's team meeting to 3 PM instead"
↓
✨ Meeting rescheduled to 3:00 PM
Update Capabilities:
- Time and date modifications - Calendar transfers - Location updates - Note additions - Reminder adjustments - Recurring pattern changes📊 Calendar Management
- View all available calendars - Smart calendar suggestions - Seamless Google Calendar integration when configured with iCloud> 💡 Pro Tip: Since you can create events in custom calendars, if you have your Google Calendar synced with your iCloud Calendar, you can use this MCP server to create events in your Google Calendar too! Just specify the google calendar when creating/updating events.
🚀 Quick Start
> 💡 Note: While these instructions focus on setting up the MCP server with Claude for Desktop, this server can be used with any MCP-compatible client. For more details on using different clients, see the MCP documentation.
Prerequisites
- uv package manager - macOS with Calendar app configured - An MCP client - Claude for desktop is recommended - OpenAI API key (set asOPENAI_API_KEY environment variable)
Installation
Whilst this MCP server can be used with any MCP compatible client, the instructions below are for use with Claude for desktop.
1. Clone and Setup
```bash
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