ms-365-mcp-server

Microsoft 365 MCP Server

A Model Context Protocol (MCP) server for interacting with Microsoft 365 services through the Graph API.

Prerequisites

• Node.js >= 14

Features

• Authentication via Microsoft Authentication Library (MSAL)
• Excel file operations
• Calendar event management
• Mail operations
• OneDrive file management
• OneNote notebooks and pages
• To Do tasks and task lists
• Planner plans and tasks
• Outlook contacts

Quick Start Example

Test login in Claude Desktop:

Examples

Integration

Claude Desktop

To add this MCP server to Claude Desktop:

Edit the config file under Settings > Developer:

{
  "mcpServers": {
    "ms365": {
      "command": "npx",
      "args": [
        "-y",
        "@softeria/ms-365-mcp-server"
      ]
    }
  }
}

Claude Code CLI

claude mcp add ms365 -- npx -y @softeria/ms-365-mcp-server

For other interfaces that support MCPs, please refer to their respective documentation for the correct integration method.

Authentication

⚠️ You must authenticate before using tools.

1. MCP client login:
   • Call the login tool (auto-checks existing token)
   • If needed, get URL+code, visit in browser
   • Use verify-login tool to confirm
2. Optional CLI login:

   npx @softeria/ms-365-mcp-server --login
   

   Follow the URL and code prompt in the terminal.

Tokens are cached securely in your OS credential store (fallback to file).

CLI Options

The following options can be used when running ms-365-mcp-server directly from the command line:

--login           Login using device code flow
--logout          Log out and clear saved credentials
--verify-login    Verify login without starting the server

Server Options

When running as an MCP server, the following options can be used:

-v                Enable verbose logging
--read-only       Start server in read-only mode, disabling write operations
--http [port]     Use Streamable HTTP transport instead of stdio (optionally specify port, default: 3000)
                  Starts Express.js server with MCP endpoint at /mcp

Environment variables:

• READ_ONLY=true|1: Alternative to --read-only flag
• LOG_LEVEL: Set logging level (default: 'info')
• SILENT=true: Disable console output
• MS365_MCP_CLIENT_ID: Custom Azure app client ID (defaults to built-in app)
• MS365_MCP_TENANT_ID: Custom tenant ID (defaults to 'common' for multi-tenant)

Support

If you're having problems or need help:

• Create an issue
• Start a discussion
• Email: eirikb@eirikb.no
• Discord: https://discord.gg/WvGVNScrAZ or @eirikb

License

MIT © 2025 Softeria