API Gateway as a Service (APIGaaS)


What Is an API Gateway?

APIs are driving force behind many applications big and small. Whether you’re publishing a public API or building a new integrations marketplace, APIs are becoming the way business is done. Just like the web era had HTTP servers to serve those websites in production, APIs have API Gateways to serve APIs in production. One can leverage API gateways to help deliver the API with high availability in mind to your customers and partners. They are a type of proxy server that sits in front of your API and performs functionality such as authentication, rate limiting, routing publicly accessible endpoints to the appropriate microservice, load balancing across multiple internal services, among other things.


API Gateway vs Direct Communication

In direct communication approach, a client app can make requests directly to some of the microservices. A direct client-to-microservice communication architecture could be good enough for a small microservice-based application, especially if the client app is a server-side web application like an ASP.NET MVC app. However, when you build large and complex microservice-based applications (for example, when handling dozens of microservice types), and especially when the client apps are remote mobile apps or SPA web applications, that approach faces a few issues.

For most microservices‑based applications, it makes sense to implement an API gateway, because it acts as a single-entry point into the system. The API gateway is responsible for request routing, composition, and protocol translation, and can streamline the system. With an API gateway, each of the application’s clients gets a custom API. The API gateway handles some requests by simply routing them to the appropriate backend service and handles others by invoking multiple backend services and aggregating the results. If there are failures in the backend services, the API gateway can mask them by returning cached or default data.


Benefits of Using API Gateway

Regardless of if you are using microservices or serverless computing or your API is internally used or publicly accessible, there are many benefits to using API gateways:



Key aspects of API Gateway:


How can we help?

For most microservices‑based applications, it makes sense to implement an API Gateway, which acts as a single-entry point into a system. The API Gateway is responsible for request routing, composition, and protocol translation. It provides each of the application’s clients with a custom API. The API Gateway can also mask failures in the backend services by returning cached or default data. If you need API Gateway integration for your services, do not hesitate to contact us and we can walk you through the details.



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