ms-365-mcp-server

Microsoft 365 MCP Server

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

Prerequisites

• Node.js >= 14

Features

• Authentication via Microsoft Authentication Library (MSAL)
• Comprehensive Microsoft 365 service integration
• Read-only mode support for safe operations
• Tool filtering for granular access control

Supported Services & Tools

Email (Outlook)
list-mail-messages, list-mail-folders, list-mail-folder-messages, get-mail-message, send-mail, delete-mail-message

Calendar
list-calendars, list-calendar-events, get-calendar-event, get-calendar-view, create-calendar-event, update-calendar-event, delete-calendar-event

OneDrive & SharePoint Files
list-drives, get-drive-root-item, list-folder-files, download-onedrive-file-content, upload-file-content, upload-new-file, delete-onedrive-file

Excel Operations
list-excel-worksheets, get-excel-range, create-excel-chart, format-excel-range, sort-excel-range

OneNote
list-onenote-notebooks, list-onenote-notebook-sections, list-onenote-section-pages, get-onenote-page-content, create-onenote-page

To Do Tasks
list-todo-task-lists, list-todo-tasks, get-todo-task, create-todo-task, update-todo-task, delete-todo-task

Planner
list-planner-tasks, get-planner-plan, list-plan-tasks, get-planner-task, create-planner-task

Contacts
list-outlook-contacts, get-outlook-contact, create-outlook-contact, update-outlook-contact, delete-outlook-contact

Teams & Chats (Work/School accounts only)
list-chats, get-chat, list-chat-messages, get-chat-message, send-chat-message, list-chat-message-replies, reply-to-chat-message, list-joined-teams, get-team, list-team-channels, get-team-channel, list-channel-messages, get-channel-message, send-channel-message, list-team-members

SharePoint Sites (Work/School accounts only)
search-sharepoint-sites, get-sharepoint-site, get-sharepoint-site-by-path, list-sharepoint-site-drives, get-sharepoint-site-drive-by-id, list-sharepoint-site-items, get-sharepoint-site-item, list-sharepoint-site-lists, get-sharepoint-site-list, list-sharepoint-site-list-items, get-sharepoint-site-list-item, get-sharepoint-sites-delta

User Profile
get-current-user

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.

The server supports three authentication methods:

1. Device Code Flow (Default)

For interactive authentication via device code:

• 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
• 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).

2. OAuth Authorization Code Flow (HTTP mode only)

When running with --http, the server requires OAuth authentication:

npx @softeria/ms-365-mcp-server --http 3000

This mode:

• Advertises OAuth capabilities to MCP clients
• Provides OAuth endpoints at /auth/* (authorize, token, metadata)
• Requires Authorization: Bearer <token> for all MCP requests
• Validates tokens with Microsoft Graph API
• Disables login/logout tools by default (use --enable-auth-tools to enable them)

MCP clients will automatically handle the OAuth flow when they see the advertised capabilities.

Setting up Azure AD for OAuth Testing

To use OAuth mode with custom Azure credentials (recommended for production), you'll need to set up an Azure AD app registration:

1. Create Azure AD App Registration:

   • Go to Azure Portal
   • Navigate to Azure Active Directory → App registrations → New registration
   • Set name: "MS365 MCP Server"

2. Configure Redirect URIs: Add these redirect URIs for testing with MCP Inspector:

   • http://localhost:6274/oauth/callback
   • http://localhost:6274/oauth/callback/debug
   • http://localhost:3000/callback (optional, for server callback)

3. Get Credentials:

   • Copy the Application (client) ID from Overview page
   • Go to Certificates & secrets → New client secret → Copy the secret value

4. Configure Environment Variables: Create a .env file in your project root:

   MS365_MCP_CLIENT_ID=your-azure-ad-app-client-id-here
   MS365_MCP_CLIENT_SECRET=your-azure-ad-app-client-secret-here
   MS365_MCP_TENANT_ID=common
   

With these configured, the server will use your custom Azure app instead of the built-in one.

3. Bring Your Own Token (BYOT)

If you are running ms-365-mcp-server as part of a larger system that manages Microsoft OAuth tokens externally, you can provide an access token directly to this MCP server:

MS365_MCP_OAUTH_TOKEN=your_oauth_token npx @softeria/ms-365-mcp-server

This method:

• Bypasses the interactive authentication flows
• Uses your pre-existing OAuth token for Microsoft Graph API requests
• Does not handle token refresh (token lifecycle management is your responsibility)

Note: HTTP mode requires authentication. For unauthenticated testing, use stdio mode with device code flow.

Authentication Tools: In HTTP mode, login/logout tools are disabled by default since OAuth handles authentication. Use --enable-auth-tools if you need them available.

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
--force-work-scopes Force inclusion of work account scopes during login (includes Teams, SharePoint, etc.)

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
--enable-auth-tools Enable login/logout tools when using HTTP mode (disabled by default in HTTP mode)
--enabled-tools <pattern> Filter tools using regex pattern (e.g., "excel|contact" to enable Excel and Contact tools)

Environment variables:

• READ_ONLY=true|1: Alternative to --read-only flag
• ENABLED_TOOLS: Filter tools using regex pattern (alternative to --enabled-tools flag)
• MS365_MCP_FORCE_WORK_SCOPES=true|1: Force inclusion of work account scopes (alternative to --force-work-scopes flag)
• LOG_LEVEL: Set logging level (default: 'info')
• SILENT=true|1: 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)
• MS365_MCP_OAUTH_TOKEN: Pre-existing OAuth token for Microsoft Graph API (BYOT method)

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