Upstreams
Each upstream is one URL plus everything about talking to it well — a health probe, timeouts, and a connection pool — managed as a record in Studio, not a config file on a box.
Registration
Point the gateway at the service and set how the proxy should treat it — per upstream, because a query engine and a tiny dashboard don't deserve the same timeouts.
Health
The proxy probes each upstream on its interval and reports what it finds into Studio — the status, when it last changed, and the reason when something failed.
The switch
Routes and upstreams each carry their own enabled switch, and the relationships between them stay visible.
Keep exploring