This article explains the authentication and authorization processes for Model Context Protocol (MCP) servers, focusing on the transport methods used, particularly standard input/output and streamable HTTP. It details how to secure remote MCP servers using OAuth 2.1 and emphasizes the importance of proper authorization for different types of clients.

The guide details how to secure an MCP server using OAuth 2.1 and PKCE, emphasizing the importance of authentication and authorization in managing access for AI-powered applications. It covers the architecture of MCP, the evolution of its authentication methods, and the implementation of secure token handling and role-based access control. By following the guide, developers can create systems that are both secure and user-friendly.