the.com/api gateways
the bouncer that checks every request's id before letting it near your actual servers.
means a single entry point that sits in front of your backend services, handling routing, auth, rate limits, and logging so your microservices don't have to.
from emerged in the 2010s as monolith apps splintered into microservices — suddenly every client needed to talk to dozens of services, so engineers built one traffic cop instead of dozens of unguarded doors.
kong, amazonpopular options: kong, aws api gateway, apigee
one doorclients see one endpoint, not fifty microservices
rate limitingoften the thing quietly saving you from ddos
latency costadds a hop, so it can slow every request