Outlook Calendar MCP server

Integrates with Microsoft Outlook Calendar to enable event management, scheduling, and attendee status updates for enhanced productivity workflows.
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Setup instructions
Provider
Meraj Mehrabi
Release date
Mar 02, 2025
Language
TypeScript
Package
Stats
4.7K downloads
31 stars

The Outlook Calendar MCP server is a tool that allows Claude to access and manage your Microsoft Outlook calendar on Windows. It enables viewing, creating, and updating calendar events, finding free time slots, and managing multiple calendars through the Model Context Protocol.

Prerequisites

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

VBScript Installation (Windows 11 24H2+ Users)

Starting with Windows 11 24H2, VBScript is no longer installed by default and must be enabled as an optional feature:

  1. Open Settings (Windows + I)
  2. Go to AppsOptional features
  3. Click "View features" next to "Add an optional feature"
  4. Search for "VBScript"
  5. Select VBScript and click Install
  6. Restart your computer after installation

Installation

Option 1: Install from npm

npm install -g outlook-calendar-mcp

You can also run it directly without installation using npx:

npx outlook-calendar-mcp

Option 2: Install from source

  1. Clone this repository or download the source code
  2. Install dependencies:
npm install
  1. Run the server:
npm start

MCP Server Configuration

For Claude Desktop App

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

If installed globally via npm:

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

Using npx (without installation):

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

If installed from source:

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

For Claude VSCode Extension

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):

If installed globally via npm:

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

Using npx (without installation):

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

If installed from source:

{
  "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.

Usage

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

List Calendar Events

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 Calendar Event

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 Time Slots

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

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

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

Update Calendar Event

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

get_calendars

Example: "Show me my available calendars"

Security Notes

  • 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

Troubleshooting

  • VBScript Not Available (Windows 11 24H2+): If you get errors after a Windows update, VBScript may need to be installed. See VBScript Installation section above
  • "Script execution failed" errors: Usually indicates VBScript is not available or Outlook is not accessible
  • 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

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "outlook-calendar" '{"command":"outlook-calendar-mcp","args":[],"env":[]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

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

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

  • macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
  • Windows: %APPDATA%\Claude\claude_desktop_config.json
  • Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

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

3. Restart Claude Desktop for the changes to take effect

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