M365 MCP Server 15 Tools

Cloudflare Worker MCP Server für Microsoft 365 (Graph API) mit OAuth 2.1 Auto-Flow.

MCP Endpoint

POST https://m365.mcp.rieker.ai/mcp
Authorization: Bearer <token>  ← wird vom MCP Client automatisch verwaltet

OAuth 2.1 Auto-Flow

MCP Client → /mcp (kein Token) → 401
↳ Client liest /.well-known/oauth-authorization-server
↳ Client öffnet /authorize → Microsoft Login (einmalig)
↳ /callback → /token → Bearer Token
↳ Alle weiteren Requests transparent mit Bearer Token

OAuth Discovery

`GET /.well-known/oauth-authorization-server`	OAuth Metadata
`GET /.well-known/oauth-protected-resource`	Resource Metadata
`GET /authorize`	Startet OAuth Flow
`GET /callback`	Microsoft OAuth Callback
`POST /token`	Token Exchange

Verfügbare Tools

Tool	Beschreibung
`onedrive_list_files`	List files in a OneDrive folder
`onedrive_get_file`	Get metadata for a OneDrive file by item ID
`onedrive_create_folder`	Create a folder in OneDrive
`onedrive_upload_text`	Upload text content as a file to OneDrive
`sharepoint_list_sites`	Search for SharePoint sites
`sharepoint_list_drives`	List drives in a SharePoint site
`sharepoint_list_files`	List files in a SharePoint drive folder
`sharepoint_get_lists`	Get lists in a SharePoint site
`sharepoint_get_list_items`	Get items from a SharePoint list
`mail_list_messages`	List email messages from a mail folder
`mail_get_message`	Get a specific email message by ID
`mail_send`	Send an email
`calendar_list_events`	List calendar events for upcoming days
`calendar_create_event`	Create a calendar event
`user_get_profile`	Get the current user profile from Microsoft 365