A Model Context Protocol (MCP) server that allows Claude to access and manage your local Microsfot Outlook calendar (Windows only).

• View Calendar Events: List events within a date range, view event details, check attendee status
• Manage Calendar Events: Create new events and meetings, update existing events
• Calendar Intelligence: Find free time slots for scheduling, identify optimal meeting times
• Multiple Calendar Support: Access different calendars in your Outlook profile

• Windows operating system
• Microsoft Outlook desktop client installed
• Node.js (version 14.x or higher)
• npm (comes with Node.js)

npm install -g outlook-calendar-mcp

You can also run it directly without installation using npx:

npx outlook-calendar-mcp

1. Clone this repository or download the source code
2. Install dependencies:

npm install

3. Run the server:

npm start

To use this tool with Claude, you need to add it to your MCP settings configuration file.

Add the following to your Claude Desktop configuration file (located at %APPDATA%\Claude\claude_desktop_config.json):

{
  "mcpServers": {
    "outlook-calendar": {
      "command": "outlook-calendar-mcp",
      "args": [],
      "env": {}
    }
  }
}

{
  "mcpServers": {
    "outlook-calendar": {
      "command": "npx",
      "args": ["-y", "outlook-calendar-mcp"],
      "env": {}
    }
  }
}

{
  "mcpServers": {
    "outlook-calendar": {
      "command": "node",
      "args": ["path/to/outlook-calendar-mcp/src/index.js"],
      "env": {}
    }
  }
}

Add the following to your Claude VSCode extension MCP settings file (located at %APPDATA%\Code\User\globalStorage\saoudrizwan.claude-dev\settings\cline_mcp_settings.json):

{
  "mcpServers": {
    "outlook-calendar": {
      "command": "outlook-calendar-mcp",
      "args": [],
      "env": {}
    }
  }
}

{
  "mcpServers": {
    "outlook-calendar": {
      "command": "npx",
      "args": ["-y", "outlook-calendar-mcp"],
      "env": {}
    }
  }
}

{
  "mcpServers": {
    "outlook-calendar": {
      "command": "node",
      "args": ["path/to/outlook-calendar-mcp/src/index.js"],
      "env": {}
    }
  }
}

For source installation, replace path/to/outlook-calendar-mcp with the actual path to where you installed this tool.

Once configured, Claude will have access to the following tools:

list_events
- startDate: Start date in MM/DD/YYYY format
- endDate: End date in MM/DD/YYYY format (optional)
- calendar: Calendar name (optional)

Example: "List my calendar events for next week"

create_event
- subject: Event subject/title
- startDate: Start date in MM/DD/YYYY format
- startTime: Start time in HH:MM AM/PM format
- endDate: End date in MM/DD/YYYY format (optional)
- endTime: End time in HH:MM AM/PM format (optional)
- location: Event location (optional)
- body: Event description (optional)
- isMeeting: Whether this is a meeting with attendees (optional)
- attendees: Semicolon-separated list of attendee email addresses (optional)
- calendar: Calendar name (optional)

Example: "Add a meeting with John about the project proposal on Friday at 2 PM"

find_free_slots
- startDate: Start date in MM/DD/YYYY format
- endDate: End date in MM/DD/YYYY format (optional)
- duration: Duration in minutes (optional)
- workDayStart: Work day start hour (0-23) (optional)
- workDayEnd: Work day end hour (0-23) (optional)
- calendar: Calendar name (optional)

Example: "When am I free for a 1-hour meeting this week?"

get_attendee_status
- eventId: Event ID
- calendar: Calendar name (optional)

Example: "Who hasn't responded to my team meeting invitation?"

Important Note: When using operations that require an event ID (update_event, delete_event, get_attendee_status), you must use the id field from the list_events response. This is the unique EntryID that Outlook uses to identify events.

update_event
- eventId: Event ID to update
- subject: New event subject/title (optional)
- startDate: New start date in MM/DD/YYYY format (optional)
- startTime: New start time in HH:MM AM/PM format (optional)
- endDate: New end date in MM/DD/YYYY format (optional)
- endTime: New end time in HH:MM AM/PM format (optional)
- location: New event location (optional)
- body: New event description (optional)
- calendar: Calendar name (optional)

Example: "Update my team meeting tomorrow to start at 3 PM instead of 2 PM"

get_calendars

Example: "Show me my available calendars"

• On first use, Outlook may display security prompts to allow script access
• The tool only accesses your local Outlook client and does not send calendar data to external servers
• All calendar operations are performed locally on your computer

• Outlook Security Prompts: If you see security prompts from Outlook, you need to allow the script to access your Outlook data
• Script Execution Policy: If you encounter script execution errors, you may need to adjust your PowerShell execution policy
• Path Issues: Ensure the path in your MCP configuration file points to the correct location of the tool

We welcome contributions to the Outlook Calendar MCP Tool! Please see our Contributing Guide for details on how to get started.

By participating in this project, you agree to abide by our Code of Conduct.

This project is licensed under the MIT License - see the LICENSE file for details.