Teams MCP Server

An MCP (Model Context Protocol) server that enables AI assistants to interact with Microsoft Teams. Search messages, send replies, manage favourites, and more.

How It Works

This server calls Microsoft's Teams APIs directly (Substrate, chatsvc, CSA) - the same APIs the Teams web app uses. No Azure AD app registration or admin consent required.

Authentication flow:

1. AI runs teams_login to open a browser for you to log in
2. OAuth tokens are extracted and cached
3. All operations use cached tokens directly (no browser needed)
4. Automatic token refresh (~1 hour)

Security: Uses the same authentication as the Teams web client - your access is limited to what your account can already do.

Installation

Prerequisites

• Node.js 18+
• A Microsoft account with Teams access
• Google Chrome, Microsoft Edge, or Chromium browser installed

Configure Your MCP Client

Add to your MCP client configuration (e.g., Claude Desktop, Cursor):

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

That's it. The server uses your system's Chrome (macOS/Linux) or Edge (Windows) for authentication.

Manual Installation (optional)

If you prefer to install globally:

npm install -g msteams-mcp

Then configure:

{
  "mcpServers": {
    "teams": {
      "command": "msteams-mcp"
    }
  }
}

Available Tools

Search & Discovery

Tool	Description
teams_search	Search messages with operators (from:, sent:, in:, hasattachment:, etc.)
teams_get_thread	Get messages from a conversation/thread
teams_find_channel	Find channels by name (your teams + org-wide discovery)
teams_get_activity	Get activity feed (mentions, reactions, replies, notifications)

Messaging

Tool	Description
teams_send_message	Send a message (default: self-chat/notes). Use replyToMessageId for thread replies
teams_edit_message	Edit one of your own messages
teams_delete_message	Delete one of your own messages (soft delete)

People & Contacts

Tool	Description
teams_get_me	Get current user profile (email, name, ID)
teams_search_people	Search for people by name or email
teams_get_frequent_contacts	Get frequently contacted people (useful for name resolution)
teams_get_chat	Get conversation ID for 1:1 chat with a person
teams_create_group_chat	Create a new group chat with multiple people (2+ others)

Organisation

Tool	Description
teams_get_favorites	Get pinned/favourite conversations
teams_add_favorite	Pin a conversation
teams_remove_favorite	Unpin a conversation
teams_save_message	Bookmark a message
teams_unsave_message	Remove bookmark from a message
teams_get_saved_messages	Get list of saved/bookmarked messages with source references
teams_get_followed_threads	Get list of followed threads with source references
teams_get_unread	Get unread counts (aggregate or per-conversation)
teams_mark_read	Mark a conversation as read up to a message

Reactions

Tool	Description
teams_search_emoji	Search for emojis by name (standard + custom org emojis)
teams_add_reaction	Add an emoji reaction to a message
teams_remove_reaction	Remove an emoji reaction from a message

Quick reactions: like, heart, laugh, surprised, sad, angry can be used directly without searching.

Session

Tool	Description
teams_login	Trigger manual login (opens browser)
teams_status	Check authentication and session state

Search Operators

The search supports Teams' native operators:

from:sarah@company.com     # Messages from person
sent:2026-01-20            # Messages from specific date
sent:>=2026-01-15          # Messages since date
in:project-alpha           # Messages in channel
"Rob Smith"                # Find @mentions (name in quotes)
hasattachment:true         # Messages with files
NOT from:email@co.com      # Exclude results

Combine operators: from:sarah@co.com sent:>=2026-01-18 hasattachment:true

Note: @me, from:me, to:me do NOT work. Use teams_get_me first to get your email/displayName. sent:today works, but sent:lastweek and sent:thisweek do NOT - use explicit dates or omit (results are sorted by recency).

MCP Resources

The server also exposes passive resources for context discovery:

Resource URI	Description
teams://me/profile	Current user's profile
teams://me/favorites	Pinned conversations
teams://status	Authentication status

CLI Tools (Development)

For local development, CLI tools are available for testing and debugging:

# Check authentication status
npm run cli -- status

# Search messages
npm run cli -- search "meeting notes"
npm run cli -- search "project" --from 0 --size 50

# Send messages (default: your own notes/self-chat)
npm run cli -- send "Hello from Teams MCP!"
npm run cli -- send "Message" --to "conversation-id"

# Force login
npm run cli -- login --force

# Output as JSON
npm run cli -- search "query" --json

MCP Test Harness

Test the server through the actual MCP protocol:

# List available tools
npm run test:mcp

# Call any tool
npm run test:mcp -- search "your query"
npm run test:mcp -- status
npm run test:mcp -- people "john smith"
npm run test:mcp -- favorites
npm run test:mcp -- activity              # Get activity feed
npm run test:mcp -- unread                # Check unread counts
npm run test:mcp -- teams_search_emoji --query "heart"  # Search emojis

Limitations

• Login required - Run teams_login to authenticate (opens browser)
• Token expiry - Tokens expire after ~1 hour; headless refresh is attempted or run teams_login again when needed
• Undocumented APIs - Uses Microsoft's internal APIs which may change without notice
• Search limitations - Full-text search only; thread replies not matching search terms won't appear (use teams_get_thread for full context)
• Own messages only - Edit/delete only works on your own messages

Session Files

Session files are stored in a user config directory (encrypted):

• macOS/Linux: ~/.msteams-mcp/
• Windows: %APPDATA%\msteams-mcp\

Contents: session-state.json, token-cache.json, .user-data/

If your session expires, call teams_login or delete the config directory.

Development

For local development:

git clone https://github.com/m0nkmaster/microsoft-teams-mcp.git
cd microsoft-teams-mcp
npm install
npm run build

Development commands:

npm run dev          # Run MCP server in dev mode
npm run build        # Compile TypeScript
npm run lint         # Run ESLint
npm run research     # Explore Teams APIs (logs network calls)
npm test             # Run unit tests
npm run typecheck    # TypeScript type checking

For development with hot reload, configure your MCP client:

{
  "mcpServers": {
    "teams": {
      "command": "npx",
      "args": ["tsx", "/path/to/microsoft-teams-mcp/src/index.ts"]
    }
  }
}

See AGENTS.md for detailed architecture and contribution guidelines.

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Teams Chat Export Bookmarklet

This repo also includes a standalone bookmarklet for exporting Teams chat messages to Markdown. See teams-bookmarklet/README.md.