API Gateway is a solitary point of access into the system. The core system architecture is encapsulated by API Gateway. It offers a customized API for each client. Authentication, monitoring, load balancing, caching, request shaping and administration, and processing of static responses are only a few of its additional duties.
Routing, composition, and protocol translation of requests are additional responsibilities of API Gateway. The API Gateway processes each and every request the client makes and then directs queries to the proper microservice.All queries in microservices are routed through an API. The API Gateway allows us to add widely used functionality like authentication, routing, rate restriction, auditing, and logging.
Imagine a situation where we don't want a single client to call a microservice more than six times. We are able to accomplish it as part of the API Gateway limit. The API gateway allows us to implement the functionalities that are shared by all microservices.