Teams 协作 MCP 服务器

Teams MCP

A Model Context Protocol (MCP) server that provides seamless integration with Microsoft Graph APIs, enabling AI assistants to interact with Microsoft Teams, users, and organizational data.

📦 Installation

To use this MCP server in Cursor/Claude/VS Code, add the following configuration:

{
  "mcpServers": {
    "teams-mcp": {
      "command": "npx",
      "args": ["-y", "@ritchy-eu/teams-mcp@latest"]
    }
  }
}

🚀 Features

🔐 Authentication

• OAuth 2.0 authentication flow with Microsoft Graph
• Secure token management and refresh
• Authentication status checking

👥 User Management

• Get current user information
• Search users by name or email
• Retrieve detailed user profiles
• Access organizational directory data

🏢 Microsoft Teams Integration

• Teams Management

  • List user's joined teams
  • Access team details and metadata

• Channel Operations

  • List channels within teams
  • Retrieve channel messages
  • Send messages to team channels
  • Support for message importance levels (normal, high, urgent)

• Team Members

  • List team members and their roles
  • Access member information

💬 Chat & Messaging

• 1:1 and Group Chats
  • List user's chats
  • Create new 1:1 or group conversations
  • Rename group chats
  • Manage group chat members: list, add (with history visibility control), remove, leave
  • Retrieve chat message history with filtering and pagination
  • Send messages to existing chats
  • Edit previously sent chat messages
  • Soft delete chat messages

✏️ Message Management

• Edit & Delete
  • Update (edit) sent messages in chats and channels
  • Soft delete messages in chats and channels (marks as deleted without permanent removal)
  • Only message senders can update/delete their own messages
  • Support for Markdown formatting, mentions, and importance levels on edits

📎 Media & Attachments

• Hosted Content
  • Download hosted content (images, files) from chat and channel messages
  • Access inline images and attachments shared in conversations

🔍 Advanced Search & Discovery

• Message Search
  • Search across all Teams channels and chats using Microsoft Search API
  • Support for KQL (Keyword Query Language) syntax
  • Filter by sender, mentions, attachments, importance, and date ranges
  • Get recent messages with advanced filtering options
  • Find messages mentioning specific users

Rich Message Formatting Support

The following tools now support rich message formatting in Teams channels and chats:

• send_channel_message
• send_chat_message
• reply_to_channel_message
• update_channel_message
• update_chat_message

Format Options

You can specify the format parameter to control the message formatting:

• text (default): Plain text
• markdown: Markdown formatting (bold, italic, lists, links, code, etc.) - converted to sanitized HTML

When format is set to markdown, the message content is converted to HTML using a secure markdown parser and sanitized to remove potentially dangerous content before being sent to Teams.

If format is not specified, the message will be sent as plain text.

Example Usage

{
  "teamId": "...",
  "channelId": "...",
  "message": "**Bold text** and _italic text_\n\n- List item 1\n- List item 2\n\n[Link](https://example.com)",
  "format": "markdown"
}

{
  "chatId": "...",
  "message": "Simple plain text message",
  "format": "text"
}

Security Features

• HTML Sanitization: All markdown content is converted to HTML and sanitized to remove potentially dangerous elements (scripts, event handlers, etc.)
• Allowed Tags: Only safe HTML tags are permitted (p, strong, em, a, ul, ol, li, h1-h6, code, pre, etc.)
• Safe Attributes: Only safe attributes are allowed (href, target, src, alt, title, width, height)
• XSS Prevention: Content is automatically sanitized to prevent cross-site scripting attacks

Supported Markdown Features

• Text formatting: Bold (**text**), italic (_text_), strikethrough (~~text~~)
• Links: [text](url)
• Lists: Bulleted (- item) and numbered (1. item)
• Code: Inline `code` and blocks code
• Headings: # H1 through ###### H6
• Line breaks: Automatic conversion of newlines to <br> tags
• Blockquotes: > quoted text
• Tables: GitHub-flavored markdown tables

📦 Installation

# Install dependencies
npm install

# Build the project
npm run build

# Set up authentication
npm run auth

🔧 Configuration

Prerequisites

• Node.js 20+
• Microsoft 365 account with appropriate permissions
• Azure App Registration with Microsoft Graph permissions

Required Microsoft Graph Permissions

• User.Read - Read user profile
• User.ReadBasic.All - Read basic user info
• Team.ReadBasic.All - Read team information
• Channel.ReadBasic.All - Read channel information
• ChannelMessage.Read.All - Read channel messages
• ChannelMessage.Send - Send channel messages
• ChannelMessage.ReadWrite - Edit and delete channel messages
• Chat.Read - Read chat messages
• Chat.ReadWrite - Create and manage chats (including edit/delete messages)
• ChatMember.ReadWrite - Add and remove chat members
• Mail.Read - Required for Microsoft Search API
• Calendars.Read - Required for Microsoft Search API
• Files.Read.All - Required for Microsoft Search API
• Files.ReadWrite.All - Upload files to chats and channels
• Sites.Read.All - Required for Microsoft Search API

Read-only mode

Set TEAMS_MCP_READ_ONLY=true (or 1/yes) to run the server in read-only mode: write tools (send, create, update, delete, reactions, file upload) are not registered, and only the reduced read-only permission scopes are requested during authentication.

🛠️ Usage

Starting the Server

# Development mode with hot reload
npm run dev

# Production mode
npm run build && node dist/index.js

Available MCP Tools

Authentication

• authenticate - Initiate OAuth authentication flow
• logout - Clear authentication tokens
• get_current_user - Get authenticated user information

User Operations

• search_users - Search for users by name or email
• get_user - Get detailed user information by ID or email

Teams Operations

• list_teams - List user's joined teams
• list_channels - List channels in a specific team
• get_channel_messages - Retrieve messages from a team channel with pagination and filtering
• send_channel_message - Send a message to a team channel
• update_channel_message - Edit a previously sent channel message
• delete_channel_message - Soft delete a channel message (supports replies)
• list_team_members - List members of a specific team
• send_file_to_channel - Send a file as a channel message or thread reply (server file or uploaded drive item)
• get_channel_attachment_download_url - Get short-lived direct download URLs for channel message attachments (supports replies)
• set_channel_message_reaction / unset_channel_message_reaction - Add or remove reactions

Chat Operations

• list_chats - List user's chats (1:1 and group)
• get_chat_messages - Retrieve messages from a specific chat with pagination and filtering; system events (members added, chat renamed, call started/ended) come back with a parsed eventDetail, and onlyCallEvents returns just call events plus a calls array (start, end, duration, initiator, participants) for time analysis
• send_chat_message - Send a message to a chat
• create_chat - Create a new 1:1 or group chat
• rename_chat - Rename a group chat (change its topic)
• update_chat_message - Edit a previously sent chat message
• delete_chat_message - Soft delete a chat message
• send_file_to_chat - Send a file as a chat message (server file or uploaded drive item)
• create_file_upload_session - Get a pre-authenticated OneDrive/SharePoint upload URL so the caller can upload a file of any size directly (the server never stores it)
• get_attachment_download_url - Get short-lived direct download URLs for message attachments
• set_chat_message_reaction / unset_chat_message_reaction - Add or remove reactions
• list_chat_members - List chat members with membership IDs and roles
• add_chat_member - Add a user to a group chat (with history visibility control)
• remove_chat_member - Remove a user from a group chat
• leave_chat - Leave a group chat
• pin_chat_message / unpin_chat_message - Pin or unpin a message in a chat
• hide_chat / unhide_chat - Hide or unhide a chat in your own chat list

Media Operations

• download_message_hosted_content - Download inline images (hosted content) from channel messages
• download_chat_hosted_content - Download inline images (hosted content) from chat messages

Search Operations

• search_messages - Search across all Teams messages using KQL syntax
• get_recent_messages - Get recent messages with advanced filtering options
• get_my_mentions - Find messages mentioning the current user

📋 Examples

Authentication

First, authenticate with Microsoft Graph:

npx @ritchy-eu/teams-mcp@latest authenticate

Check your authentication status:

npx @ritchy-eu/teams-mcp@latest check

Logout if needed:

npx @ritchy-eu/teams-mcp@latest logout

Integrating with Cursor/Claude

This MCP server is designed to work with AI assistants like Claude/Cursor/VS Code through the Model Context Protocol.

{
  "mcpServers": {
    "teams-mcp": {
      "command": "npx",
      "args": ["-y", "@ritchy-eu/teams-mcp@latest"]
    }
  }
}

🔒 Security

• All authentication is handled through Microsoft's OAuth 2.0 flow
• Refresh token support: Access tokens are automatically renewed using cached refresh tokens, so you don't need to re-authenticate every hour
• Token cache is stored locally at ~/.teams-mcp-token-cache.json
• No sensitive data is logged or exposed
• Follows Microsoft Graph API security best practices

📝 License

MIT License - see LICENSE file for details

🤝 Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Run linting and formatting
5. Submit a pull request

📞 Support

For issues and questions:

• Check the existing GitHub issues
• Review Microsoft Graph API documentation
• Ensure proper authentication and permissions are configured