Authentication and Authorization for Internal MCP Servers

The article delves into the implementation of PropelAuth as a security layer for the Model Context Protocol (MCP) server, which connects large language models (LLMs) with sensitive organizational data, such as private repositories and databases. It highlights the potential risks of an unsecured MCP server, which could inadvertently grant excessive access to LLMs, leading to data breaches or unauthorized actions. PropelAuth addresses these issues by providing a robust authentication and authorization framework, including user management, role-based access control (RBAC), and Enterprise Single Sign-On (SSO) integrated with SCIM for automated user identity synchronization. This solution allows organizations to define specific roles and access scopes for their internal tools, effectively restricting data access based on departmental needs and preventing unauthorized actions. The article emphasizes the importance of securing AI infrastructure to harness the productivity benefits of MCP while maintaining stringent data protection measures.