What is MCP Gateway?

An MCP gateway is an essential architectural layer that scales Model Context Protocol (MCP) client-server communications by serving as the central enforcement point for authentication, policy, and observability, thereby addressing issues such as redundant logic, inconsistent error handling, and fragmented security controls. The gateway facilitates authentication and authorization, sanitizes input and output to mitigate security risks like prompt injection, and ensures observability to comply with enterprise standards and detect potential exploits. By implementing load balancing and enforcing operational policies, the gateway prevents performance bottlenecks and unauthorized access, enhancing security and governance across the MCP ecosystem. While self-engineering an MCP gateway might seem feasible, most organizations opt for specialized platforms like Credal, which offer comprehensive security, compliance, and observability features, ensuring that MCP interactions are efficiently managed and secure.