Every microservice has to find the others and learn its own settings, and Nacos is the discovery and configuration platform that answers both needs from a single server. Producers register instances with names, addresses, weights, and metadata, and consumers look services up or subscribe to changes, so a fresh instance receives traffic without hand-edited load balancer rules. Health checks drop dead instances from discovery results, while weight controls in the console shift traffic gradually during a rollout or drain a node before maintenance. Configuration lives apart from code: publish properties and YAML under a Data ID and Group, split environments with namespaces, and subscribed clients apply changes within seconds. History keeps every published version, so a typo is recoverable: rollback republishes an earlier value, and listener queries show which clients picked the change up. Gray releases push a new value to a chosen slice of instances first, so a risky flag reaches a fraction of the fleet before the rest. The registry covers AI building blocks too: MCP servers register their tools, prompts and skills carry versions and visibility, and agents publish discovery cards that gateways look up like any service. Spring Cloud, Dubbo, and Kubernetes workloads plug in through SDKs for Java, Go, Python, and other languages; run one standalone node for development or a Raft-backed cluster for production. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache-2.0 licensed.