To provide uniform management and control of API accesses from external application systems to various microservices in the system, deploy service gateways. APIs enable applications to access data and functionality from your backend services. An API gateway exposes APIs to users.
A service gateway is an API gateway. Service gateways each provide secure, load balanced access to a set of associated services. They provide functionalities including request load balancing among servers, routing, route caching, and uniform access authentication.