NATS Has a Free API — Cloud-Native Messaging at 18 Million Messages per Second

NATS is a high-performance messaging system that handles 18M+ messages per second. It provides pub/sub, request-reply, and streaming (JetStream) — all in a single 15MB binary. Free, open source, CNCF incubating. Used by Tesla, GE, Mastercard. Why Use NATS? 18M+ msg/sec — fastest messaging system available Tiny footprint — single 15MB binary, starts in milliseconds JetStream — built-in persistent streaming (like Kafka, but simpler) Multi-pattern — pub/sub, request-reply, queue groups Zero config clustering — auto-discovery and routing Quick Setup 1. Install # Docker docker run -p 4222:4222 -p 8222:8222 nats -js -m 8222 # Binary curl -L https://github.com/nats-io/nats-server/releases/latest/download/nats-server-linux-amd64.zip -o nats.zip unzip nats.zip && ./nats-server -js -m 8222 2. Monitor via HTTP API NATS = "http://localhost:8222" # Server info curl -s " $NATS /varz" | jq '{version: .version, connections: .connections, messages: .in_msgs, bytes: .in_bytes, mem: .mem}' # Connection d