APIs are everywhere today. Whether it’s buying something online, logging into a mobile app, or streaming a movie, an API is always working behind the scenes. Over the last decade, APIs have become the backbone of modern software systems. As an application scales, the volume of API calls increases rapidly, and managing them becomes more complex. This is where API gateways come into action.

An API gateway acts as an entry point for all internal or external API traffic. It sits in front of the backend services and handles responsibilities such as authentications, routing, rate limiting, logging, performance monitoring, and more.