0n3
MCP servers · Microsoft 365 · connector

Connect Claude (desktop & claude.ai) to Microsoft 365

One line gives Claude (desktop & claude.ai) your Microsoft 365 account as tools: 20 endpoints, mail, events, teams, called with your own connection. No key in the prompt, a receipt for every call, revoke Claude (desktop & claude.ai)'s access alone any time.

Get the line for Claude (desktop & claude.ai)Connect Microsoft 365 first

Three steps

  1. Create a free 0n3 account and connect Microsoft 365. Paste a key or sign in; it lands in your vault, encrypted.
  2. Install 0n3 into Claude (desktop & claude.ai). Add 0n3 as a custom connector; sign in once through the 0n door.
  3. Ask Claude (desktop & claude.ai): whoami. Then: "Send a mail in Microsoft 365".
Claude desktop app and claude.ai
  1. Settings → Connectors → Add custom connector
  2. Name: 0n3 · URL: https://0n3.app/mcp
  3. Click Connect and sign in with your 0n account (email + password, or paste your 0n token)
  4. Turn the connector on in a chat and ask: "whoami"

This is the OAuth door: no token to paste, revoke it any time from 0n3 → Tokens.

The line above carries a placeholder; 0n3.app/install mints a real key named for Claude (desktop & claude.ai) and fills it in.

What Claude (desktop & claude.ai) can then do in Microsoft 365

Mail · Send and manage Outlook email1
Send a mailPOST /me/sendMail
Events · Manage Outlook calendar events4
List eventsGET /me/events
Create an eventPOST /me/events
Update an eventPATCH /me/events/{eventId}
Delete an eventDELETE /me/events/{eventId}
Teams · Send Teams messages and list channels3
List teamsGET /me/joinedTeams
List channelsGET /teams/{teamId}/channels
Send a channel messagePOST /teams/{teamId}/channels/{channelId}/messages
Users · View organization users1
Get an userGET /me
Files · OneDrive and SharePoint files, including items shared by link from another user's drive0
OneDrive and SharePoint files, including items shared by link from another user's drive
More · Everything else this app exposes.11
List messagesGET /me/messages
Get a messageGET /me/messages/{messageId}
Delete a messageDELETE /me/messages/{messageId}
List drive itemsGET /me/drive/root/children
Get a drive itemGET /me/drive/items/{itemId}
Search driveGET /me/drive/root/search(q='{query}')
Resolve shareGET /shares/{encodedUrl}/driveItem
List shared with meGET /me/drive/sharedWithMe
Get an item contentGET /drives/{driveId}/items/{itemId}/content
Get a siteGET /sites/{hostname}:/sites/{sitePath}
List site itemsGET /sites/{siteId}/drive/root/children

Microsoft 365 in other AI clients

Claude Code + Microsoft 365MCP server + skillChatGPT + Microsoft 365connector · GPT actionCodex CLI + Microsoft 365MCP serverGemini CLI + Microsoft 365MCP serverCursor + Microsoft 365MCP serverVS Code (Copilot) + Microsoft 365MCP serverWindsurf + Microsoft 365MCP server

Claude (desktop & claude.ai) with other apps

Hostinger363 endpointsTelegram132 endpointsPipedrive95 endpointsResend67 endpointsSquare57 endpointsLinkedIn50 endpointsSlack45 endpointsFigma32 endpointsCloudConvert32 endpointseBay25 endpointsQuickBooks21 endpointsCloudflare21 endpoints