Microsoft 365 MCP
UnknownMicrosoft 365 MCP is a community server (MIT, 874★) by Softeria on top of the Microsoft Graph API: 300+ tools give an agent access to Outlook mail, calendar, OneDrive, Excel, OneNote, To Do, Planner, Teams and SharePoint. Auth is via device code flow or OAuth authorization code in HTTP mode. It runs as stdio or as an HTTP server; an experimental TOON format saves 30-60% tokens vs JSON.
Why this server
- 300+ tools cover nearly all of the Graph API — mail, calendar, OneDrive, Planner
- Device code flow: the agent gives a browser code, no password in any config file
- The experimental TOON format saves 30-60% tokens compared to plain JSON
- 874 GitHub stars, MIT licensed, runs as stdio or as an HTTP server on /mcp
Usage examples
Prompt: What emails came in the last hour, and what's on my calendar today?
Result: The agent called the Outlook Mail and Calendar Graph API tools — returning fresh emails and today's events in one reply.
Prompt: Find the latest budget file in OneDrive and add a Planner task to review it
Result: The agent found the file via the OneDrive tools, then created a Planner task linked to it — no switching between Microsoft 365 apps.
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