# NATS (ops)

Ops does not subscribe. Runtime processes use:

- `NATS_URL` — comma-separated client URLs on a **private** network
- JetStream required (`-js`)
- Cluster routes on port 6222
- **No public bind** of 4222

See [06-linking-services.md](06-linking-services.md) and https://zapier.georgelambert.org/overview/03-nats-cluster.pdf