ms365-mcp-server
Advanced tools
Microsoft 365 MCP Server for managing Microsoft 365 email through natural language interactions with full OAuth2 authentication support
A powerful Model Context Protocol (MCP) server that enables seamless Microsoft 365 email integration through natural language interactions. Built for SIYA Desktop, LLMs, and any MCP-compatible application with production-ready security.
For detailed technical documentation, enhancement reports, and guides, see the docs/ directory:
send_email - Send emails with attachments and rich formattingmanage_email - UNIFIED: Read, search, list, mark, move, delete, or draft emailsget_attachment - Download email attachments with metadatalist_folders - Browse mailbox folders with item countsmanage_contacts - UNIFIED: List all contacts or search by name/emailauthenticate - UNIFIED: Complete authentication management (login, status, logout)Option A: Global Installation
# Install globally
npm install -g ms365-mcp-server
# Authenticate (no Azure setup needed!)
ms365-mcp-server --login
# Start the server
ms365-mcp-server
# Start with custom server URL
ms365-mcp-server --server-url https://your-domain.com
Option B: Run with npx (no installation needed)
# Authenticate
npx ms365-mcp-server --login
# Start the server
npx ms365-mcp-server
# Start with custom server URL
npx ms365-mcp-server --server-url https://your-domain.com
For Global Installation:
{
"mcpServers": {
"ms365": {
"command": "ms365-mcp-server",
"args": ["--server-url", "https://your-domain.com"]
}
}
}
For npx Usage:
{
"mcpServers": {
"ms365": {
"command": "npx",
"args": ["ms365-mcp-server", "--server-url", "https://your-domain.com"]
}
}
}
Chat with SIYA and ask it to help with your emails! The tools are designed for natural language interaction.
# One-command authentication
ms365-mcp-server --login
# Authentication with custom server URL
ms365-mcp-server --login --server-url https://your-domain.com
# Set server URL via environment variable
export SERVER_URL=https://your-domain.com
ms365-mcp-server
// Check authentication status
{
"tool": "authenticate",
"arguments": {
"action": "status"
}
}
// Login with device code
{
"tool": "authenticate",
"arguments": {
"action": "login"
}
}
// Logout
{
"tool": "authenticate",
"arguments": {
"action": "logout"
}
}
// Send an email with attachment
{
"tool": "send_email",
"arguments": {
"to": ["colleague@company.com"],
"subject": "Project Update",
"body": "<h2>Status Report</h2><p>Project is on track!</p>",
"bodyType": "html",
"attachments": [{
"name": "report.pdf",
"contentBytes": "base64_encoded_content"
}]
}
}
// Search emails with smart name matching
{
"tool": "manage_email",
"arguments": {
"action": "search",
"from": "John Smith", // Works with names or emails
"after": "2024-01-01",
"hasAttachment": true
}
}
// List recent inbox emails
{
"tool": "manage_email",
"arguments": {
"action": "list",
"folderId": "inbox",
"maxResults": 10
}
}
// Find emails sent to you (TO or CC)
{
"tool": "manage_email",
"arguments": {
"action": "search_to_me",
"from": "boss@company.com",
"isUnread": true
}
}
// Read a specific email
{
"tool": "manage_email",
"arguments": {
"action": "read",
"messageId": "email_id_here"
}
}
// Mark email as read
{
"tool": "manage_email",
"arguments": {
"action": "mark",
"messageId": "email_id",
"isRead": true
}
}
// Move email to folder
{
"tool": "manage_email",
"arguments": {
"action": "move",
"messageId": "email_id",
"destinationFolderId": "archive"
}
}
// Delete email
{
"tool": "manage_email",
"arguments": {
"action": "delete",
"messageId": "email_id"
}
}
// Create draft email
{
"tool": "manage_email",
"arguments": {
"action": "draft",
"draftTo": ["colleague@company.com"],
"draftSubject": "Draft: Project Update",
"draftBody": "<h2>Status Report</h2><p>Project is on track!</p>",
"draftBodyType": "html",
"draftCc": ["manager@company.com"],
"draftImportance": "normal"
}
}
// List all contacts
{
"tool": "manage_contacts",
"arguments": {
"action": "list",
"maxResults": 100
}
}
// Search contacts by name
{
"tool": "manage_contacts",
"arguments": {
"action": "search",
"query": "John"
}
}
// Get attachment from email
{
"tool": "get_attachment",
"arguments": {
"messageId": "email_id",
"attachmentId": "attachment_id"
}
}
// List mailbox folders
{
"tool": "list_folders",
"arguments": {}
}
// Download a specific attachment
{
"tool": "get_attachment",
"arguments": {
"messageId": "email_id",
"attachmentId": "attachment_id"
}
}
// Download all attachments from an email
{
"tool": "get_attachment",
"arguments": {
"messageId": "email_id"
}
}
The server automatically serves downloaded attachments. By default, files are served at http://localhost:55000/attachments/. For production environments, configure the server URL using the SERVER_URL environment variable:
# Local development (default)
SERVER_URL=http://localhost:55000 ms365-mcp-server
# Production environment
SERVER_URL=https://your-domain.com ms365-mcp-server
Files are:
Attachments are automatically cleaned up after 24 hours. You can also manually delete files from the public/attachments directory.
// Create a basic draft
{
"tool": "manage_email",
"arguments": {
"action": "draft",
"draftTo": ["colleague@company.com"],
"draftSubject": "Project Update",
"draftBody": "Draft content here...",
"draftBodyType": "text"
}
}
// Create a threaded reply draft (automatically appears in email thread)
{
"tool": "manage_email",
"arguments": {
"action": "reply_draft",
"originalMessageId": "original_email_id",
"draftBody": "My reply content...", // Optional comment
"replyToAll": false
}
}
// Create a forward draft (automatically includes original content)
{
"tool": "manage_email",
"arguments": {
"action": "forward_draft",
"originalMessageId": "original_email_id",
"draftBody": "Forwarding this for your review..." // Optional comment
}
}
// Update an existing draft
{
"tool": "manage_email",
"arguments": {
"action": "update_draft",
"draftId": "draft_email_id",
"draftSubject": "Updated Subject",
"draftBody": "Updated content..."
}
}
// Send a saved draft
{
"tool": "manage_email",
"arguments": {
"action": "send_draft",
"draftId": "draft_email_id"
}
}
// List all draft emails
{
"tool": "manage_email",
"arguments": {
"action": "list_drafts",
"maxResults": 20
}
}
// List all folders including subfolders with hierarchy
{
"tool": "list_folders"
}
// List only child folders of a specific parent folder
{
"tool": "list_folders",
"arguments": {
"parentFolderId": "inbox_folder_id"
}
}
// Search for folders by name (case-insensitive)
{
"tool": "list_folders",
"arguments": {
"searchName": "projects"
}
}
# Authentication
ms365-mcp-server --login # Authenticate using device code
ms365-mcp-server --logout # Clear stored tokens
ms365-mcp-server --verify-login # Check authentication status
# Management
ms365-mcp-server --setup-auth # Interactive credential setup
ms365-mcp-server --reset-auth # Clear all authentication data
ms365-mcp-server --debug # Enable detailed logging
# Check current status
ms365-mcp-server --verify-login
# Reset and re-authenticate
ms365-mcp-server --logout
ms365-mcp-server --login
# Enable detailed logging
ms365-mcp-server --debug
# Logs location: /tmp/ms365-mcp-server.log
--login--login--login again# Local development
npm run dev
# Build and test
npm run build
npm test
# Version management
npm run version-bump [patch|minor|major]
MIT License - see LICENSE file for details.
Contributions welcome! Please submit issues and pull requests.
Built with 🔒 Security and ❤️ for the AI community
Production-ready Microsoft 365 integration for SIYA Desktop and MCP applications
--server-url URL: Set custom server URL for attachments and authentication (default: http://localhost:55000)SERVER_URL: Environment variable to set server URL--setup-auth: Set up MS365 API credentials--reset-auth: Clear stored authentication tokens--multi-user: Enable multi-user authentication mode--login: Login to MS365--logout: Logout from MS365--verify-login: Verify login status--debug: Enable debug output--non-interactive, -n: Run in non-interactive mode (no prompt)--help, -h: Show help messageFAQs
Microsoft 365 MCP Server for managing Microsoft 365 email through natural language interactions with full OAuth2 authentication support
The npm package ms365-mcp-server receives a total of 13 weekly downloads. As such, ms365-mcp-server popularity was classified as not popular.
We found that ms365-mcp-server demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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