Modern technology gives us many things.

The Middleman of Information: How APIs Work


What is an API? An API (Applications Programming Interface) is an intermediary that defines interactions between multiple software applications. It defines the requests and calls that are made, how they are made, the conventions to follow, and the data formats that should be used.

They are versatile and can be used on operating systems, web applications, computer hardware, and database systems.

APIs have made developers’ work simpler and more efficient. They (developers) are able to reuse code and only change the parts that are needed by the process they are working on. A well-designed API makes the process of creating an application easier because its building blocks are in place. Their defined protocols allow developers to build, integrate, and connect applications quickly. 

The value of an application is defined by the APIs it uses. An API that does not work effectively and efficiently can break not only a single application, but an entire chain of business processes. This means that API testing is an important phase of the entire API design process. For thorough testing, developers start by setting up a testing environment with the right set of parameters. 

This involves configuring the server and the database to match the requirements of the application. They also need to use 7 API collaboration tools to manage, secure, analyze, mediate, and grow the API.

How Do APIs Work?

APIs use a set of rules that dictate how computers, machines or applications communicate with each other. The API is basically the middleman between two or more applications that need to connect with each other to share information. 

For example, when you sign in to Twitter using your phone, you tell the Twitter application that you want access to your account. The Twitter mobile application makes a call to an API that gets your Twitter account and its credentials.

Twitter will then gain access to this information from its servers and the data is returned to the mobile application. This is an example of a web API. Although limited to the web, they are the most common types of APIs. However, there are APIs for every system that needs to communicate with other systems.

Types of APIs

  • REST APIs (Representational State Transfer): These APIs deliver data using JSON format and are the most common among public APIs. This is because of their dependability, fast performance, and ability to scale with ease without affecting the whole system.
  • SOAP (Simple Object Access Protocol): These APIs use XML to transfer data and have strict rules with advanced security that require a lot of bandwidth. They are a little bit difficult to use, lack the ability to cache, and will need every detail about an interaction before processing any calls.
  • JSON-RPC: These APIs are similar to the XML-RPC below but use JSON instead of the XML format. The client calls on a single method of a system.
  • XML-RPC: These are simpler APIs and use a specific XML format to transfer data. A client sends an HTTP request to a server that implements XML-RPC and then receives the HTTP response.

The API technology is powerful and can achieve a lot of things. It is being used today in almost every other application that we use every day. It has also made work a lot easier for many companies and businesses.

However, the same APIs can bring business operations to a halt if they are not implemented correctly. For example, the recent attack on Twitter identities might have been made possible by a problem with their APIs.