In order to discuss what API as a Service is, we must first understand what APIs and API Services (and microservices) are. In this article, we are going to explain these terms in the simplest form possible so that you can better understand how APIs fit into your business needs.
This article is part of our FQ series that will be answering basic questions related to mobile backend as a service (MBaaS). Other articles include: “What is Serverless Computing?” and “What is Mobile Backend as a Service (MBaaS)?”
API (Application Programming Interface) services are, by definition, interfaces that provide a program with a description of how to interact with a system in order to retrieve and/or change the data within it. Thus, for the purposes of this article, an API Service is the means with which a piece of software interacts with the functionality stored in the software’s backend (i.e., on the server or made available by a third party).
Although there are some technical differences, for this article, we will assume that the APIs we discuss are “web APIs”; that is, APIs provided over the HTTP/HTTPS protocol.
The term API microservice describes an API that interacts with a backend that uses the architectural structure known as microservices. Microservice architecture is a method for building applications in which components are broken down into small, independent pieces rather than contained in a single, siloed (or monolithic) application.
Microservices are contained in small, individual containers rather than being included in a single, large application. The advantage of this approach is that it allows for much safer modification of backend code. This is because you are simply changing one element rather than having to modify and redeploy the entire application. Subsequently, this makes debugging much easier because you can quickly see which element is causing issues.
Another benefit of the microservice approach is that the self-contained elements are highly reusable. This plays a key role in what we will discuss next.
In a recent article by TechCrunch, the well-known tech blog site described APIs as the next big wave in Software as a Service. API as a Service is, in essence, a software platform that allows users to interact with third-party APIs as well as manage their own custom APIs.
An API as a Service platform provides two key elements: the ability to build, test, and deploy one’s own API services, and the ability to connect an application with third-party APIs, such as Google Maps, payment processing services, and voice search APIs.
Another critical element of API as a Service: the ability to generate API docs. API documentation is necessary to describe the purpose, functionality, and inputs required for each API. Documentation allows APIs to be shared seamlessly among teams within an organization, or to be made available to others as third-party APIs.
The most common architectural style for modern web services is called REST (representational state transfer). REST APIs use a stateless protocol and standard operations in order to achieve fast performance, reliability, and growth through the reuse of components.
Much like microservices, REST APIs aim to use primarily reusable components that can easily be interchanged, modified, and updated without affecting the system as a whole. This provides protection when developing and updating your application by reducing the risk of breaking something system-wide.
An application is said to be RESTful when it is composed mostly or entirely of REST APIs. REST APIs may be used individually within an application, or they may be contained within an SDK (software development kit).
As a Mobile Backend as a Service (MBaaS) platform, Backendless is also a fully-capable API as a Service platform. Backendless is built using the microservice architecture. This means that all of the Backendless built-in APIs can be used individually or in tandem within an application. All Backendless APIs are available as basic REST APIs and for all of our SDKs, including iOS, Android, and Flutter.
Additionally, we give you the ability to import your APIs from a variety of sources. Once they are in our platform, you can easily modify, combine, or create new APIs right from your browser, continuous integration system, or developer workstations.
Backendless provides thorough documentation for all of our built-in APIs. We also have built automatic API doc generation into the Backendless Console. That way, your developers can easily document and share APIs.
We are developing an API Marketplace that will make it possible for your development team to share APIs with other Backendless users. Right now, you can share APIs on the marketplace for your other teams to access. In the future, you will also have the ability to generate additional revenue by licensing your APIs to third parties via the marketplace.
You can learn more about Backendless’ API Service capabilities on our Features page.
We hope that this provided some clarity about what APIs do as well as the meaning of API as a Service. If you’d like to try Backendless as your API management platform, you can begin a free trial of Backendless Cloud here or install Backendless Pro on your own machine for a free trial.
In future articles, we will cover additional topics that may not be well understood by non-technical personnel. These include terms such as serverless hosting, codeless programming, user authentication, and more.