MCP Server-Side Authentication With On New Session Listener using Basic Auth

About this lesson

The MCP specification emphasizes session management and SSE connections maintain state. The On New Session Listener source offers a key point for implementing server-side authentication. This example illustrates a basic flow triggered by this listener, showing how to access the auto-generated sessionId and the HTTP headers sent by the connecting client, which can then be used for custom authentication logic. This is an example flow that uses the On New Session Listener to validate client-id and client-secret getting passed through Cursor along with to validate Basic Auth getting passed through MuleSoft MCP Client

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