Grafbase Gateway is a high-performance GraphQL federation gateway with built-in MCP support. It enables you to expose your GraphQL API as a Model Context Protocol (MCP) server with just a few configuration lines. Built for Federation v2, Grafbase provides native Apollo Federation v2 compatibility and composite schemas, while delivering ultra-fast Rust-powered performance and low memory usage suitable for mission-critical workloads. The gateway is extensible through WebAssembly extensions, letting you customize authentication, authorization, request lifecycles, and connect arbitrary data sources without modifying the gateway core. It includes governance and control-plane features for enterprise teams, such as schema composition checks, breaking change detection, and approval workflows, plus branch environments for versioning and isolated development. Observability is built-in via OpenTelemetry for logs, traces, and metrics, and the gateway offers entity caching, persisted queries, health checks, rate limiting, and request lifecycle hooks. With MCP, Grafbase makes it straightforward to turn any GraphQL API into a fully functional MCP server with minimal setup and straightforward configuration.