@ryaker
Basic information
MCP server for Claude to access Outlook data via Microsoft Graph API
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"outlook-mcp": {
"command": "npx",
"args": [
"kill-port",
"3333"
]
}
}
}Tool list not available yet
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Fetch the live tool list by running this server in a temporary sandbox using the button above.
Modular Outlook MCP Server is an MCP (Model Context Protocol) server that connects Claude with Microsoft 365 services through the Microsoft Graph API and Power Automate API. It provides tools for managing Outlook (email, calendar, folders, rules), OneDrive (files, sharing), and Power Automate (flows, environments, run history). Designed for developers and administrators who want to interact with M365 data directly from Claude.
Install dependencies with npm install, then register an Azure AD app with required permissions and configure environment variables in .env. Start the auth server with npm run auth-server, use the authenticate tool in Claude to get an OAuth URL, sign in, and tokens are saved to ~/.outlook-mcp-tokens.json. Add the server to Claude Desktop config with command: "node" and the path to index.js.
Delegated permissions for `User.Read`, `Mail.Read`, `Mail.ReadWrite`, `Mail.Send`, `Calendars.Read`, `Calendars.ReadWrite`, `Files.Read`, `Files.ReadWrite`, and `offline_access` are needed. For Power Automate, additional Azure AD configuration with `https://service.flow.microsoft.com//.default` scope is required.
Run `npm run auth-server` and use the `authenticate` tool in Claude. Visit the provided URL, sign in with your Microsoft account, and tokens are saved locally.
Only solution-aware flows are accessible, only manual-trigger flows can be run via API, and an environment ID is required for most operations.
Set `USE_TEST_MODE=true` in `.env` or pass the environment variable `USE_TEST_MODE=true` in the Claude Desktop config. This uses mock data for all operations.
If you see "Invalid client secret", ensure you are using the client secret **VALUE** (not the Secret ID). For "Authentication required", delete `~/.outlook-mcp-tokens.json` and re-authenticate.
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