Envoy Has a Free API: The Service Proxy That Powers 90% of Service Meshes

When your microservices need to talk to each other, you need a proxy that handles routing, load balancing, observability, and security — without slowing things down. Envoy does exactly this, and it powers Istio, Consul Connect, and most service meshes in production. What Is Envoy? Envoy is a high-performance L4/L7 proxy designed for modern cloud-native applications. Originally built at Lyft, it handles service-to-service communication with automatic retries, circuit breaking, rate limiting, and rich observability — all configured via API, not config files. The Free API Envoy is completely free and open source: xDS API : Dynamic configuration without restarts Admin API : Runtime stats, config dumps, health checks gRPC + REST : First-class support for both protocols WASM filters : Extend Envoy with custom logic in any language Zero-downtime config : Hot-reload routing rules via API Quick Start Run Envoy with Docker: docker run -d --name envoy \ -p 10000:10000 -p 9901:9901 \ -v $( pwd ) /