WorkOS offers a streamlined solution for implementing secure authentication with its MCP servers using OAuth 2.1 flows, making it easy for developers to integrate complex protocols. The platform provides essential tools, documentation, and community support to help users quickly launch their apps without the need for user migration. With AuthKit, developers can focus on building their applications while it handles the intricacies of OAuth.

The article explains how to utilize AuthKit as the authorization server for a Model Context Protocol (MCP) server, detailing the integration process and necessary authentication flows. It emphasizes the role of AuthKit in managing access securely and outlines how to implement token verification, Dynamic Client Registration, and the use of metadata endpoints for seamless client-server interactions. Additionally, it introduces Standalone Connect as a method to integrate AuthKit with existing authentication systems while maintaining user experience.

AuthKit serves as the authorization server for MCP servers, facilitating secure access management for applications interacting with LLM-based clients. The guide details the integration process, emphasizing the importance of OAuth 2.0, token verification, and the use of metadata endpoints for dynamic client registration and interoperability. Developers can also utilize Standalone Connect to maintain their existing authentication systems while leveraging AuthKit’s infrastructure.

MCP authorization leverages several OAuth specifications to enable secure access to Large Language Models (LLMs) and their integration with remote services. The article outlines the progression from local-only MCP servers to a robust framework that includes dynamic registration, metadata discovery, and the use of PKCE for secure interactions. These advancements facilitate a seamless experience for users wishing to connect their LLMs with various tools without complex configurations.

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.