@insightsentry/email-mcp

@insightsentry/email-mcp

MCP (Model Context Protocol) server for Microsoft Outlook, To Do, and Calendar via the Microsoft Graph API.

Gives AI assistants direct access to your Outlook mailbox — read, send, draft, and reply to emails, manage To Do tasks, and manage calendar events. Uses OAuth2 client credentials flow so no interactive login is needed.

Setup

Prerequisites

You need a Microsoft Entra (Azure AD) app registration with the following application permissions:

• Mail.ReadWrite
• Mail.Send
• Tasks.ReadWrite
• Calendars.ReadWrite

Gather these values from your app registration:

Variable	Description
GRAPH_API_CLIENT_ID	Application (client) ID
GRAPH_API_CLIENT_SECRET	Client secret value
GRAPH_API_TENANT_ID	Directory (tenant) ID
GRAPH_API_USER_ID	Object ID or UPN of the mailbox user

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "outlook": {
      "command": "npx",
      "args": ["@insightsentry/email-mcp"],
      "env": {
        "GRAPH_API_CLIENT_ID": "your-client-id",
        "GRAPH_API_CLIENT_SECRET": "your-client-secret",
        "GRAPH_API_TENANT_ID": "your-tenant-id",
        "GRAPH_API_USER_ID": "your-user-id"
      }
    }
  }
}

Claude Code

Add to .mcp.json in your project root:

{
  "mcpServers": {
    "outlook": {
      "command": "npx",
      "args": ["@insightsentry/email-mcp"],
      "env": {
        "GRAPH_API_CLIENT_ID": "your-client-id",
        "GRAPH_API_CLIENT_SECRET": "your-client-secret",
        "GRAPH_API_TENANT_ID": "your-tenant-id",
        "GRAPH_API_USER_ID": "your-user-id"
      }
    }
  }
}

Available Tools (15)

Email

Tool	Description
list_emails	List emails with pagination, filtering, and search
read_email	Read full email content by ID
create_draft	Create a draft email
send_email	Send a new email directly
reply_email	Reply or reply-all to an email

To Do

Tool	Description
list_task_lists	List all To Do task lists
list_tasks	List tasks in a task list with filtering
create_task	Create a task with title, body, due date, importance
update_task	Update task title, body, due date, importance, or status
delete_task	Delete a task

Calendar

Tool	Description
list_events	List upcoming calendar events in a time range
get_event	Get full details of a calendar event
create_event	Create an event with attendees, location, Teams meeting
update_event	Update event details
delete_event	Delete a calendar event

Token Caching

Access tokens are cached to ~/.outlook-mcp/token.json and reused across invocations until they expire. No interactive login is required.

Development

npm install
npm run build     # Compile TypeScript
npm run dev       # Run with tsx (no build needed)

License

MIT