Implement pagination and caching if needed by the application. Handle exceptions properly, define all the HTTP response codes, and build an endpoint for the API to receive the requests.Ĭheck for the API performance. Start with the basic functionality and iterate to add more features gradually. If you want high performance and speed, REST would be a good choice, but if security is more important, you can go for SOAP. ![]() The API should be secure, scalable, and easy to integrate and test. ![]() Here are the steps to create an API:ĭefine the purpose and target users for the API.ĭecide the architecture for the API, like SOAP or REST, depending on your requirements. You can code API in any language of your choice. Once the API receives the response from the service, it sends the response back to the requesting application (client) via HTTP. If the request is valid, the API makes a call to the required service. If the request is not valid, the API will not call the program but return an error. The requests include the request method, headers, and body-for example, in XML, JSON, or other formats. The request is sent via HTTP to the URI (Uniform Resource Identifier). The client places a request from their device, using the HTTP GET, PUT, POST, or DELETE methods. How applications use API to exchange data The most commonly used web APIs follow the REST (Representational State Transfer) architecture, where requests and responses are delivered via the HTTP protocol. There is no front end of an API and the requests are usually sent through a web server over the internet. Any individual can create an API to share their content with more people. For example, social media plugins and programming language APIs are used by developers and web users. Now, if the person who created this weather app exposed a public API (say the method name), you can use their functionality as it is and get the data for your app users!Ĭompanies can create APIs for their internal use or to share with the public. If there is already a weather application that displays weather based on your location and time, it’d save a lot of your effort building another one. ![]() Since basketball is an outdoor sport, you want to display the weather so that it's handy for customers to make an informed booking. Let’s say you want to build an app where users can book slots for playing basketball, based on court availability. So, if you want to use a functionality, you’d know what the method does, but you wouldn’t know how the method works! The interface in an API is very similar-you hide the internal workings of your program by exposing only a part of the functionality through the API.īy exposing an API, you provide a protocol that other programs can use to communicate with your app. Interface hides the implementation from outsiders (i.e., third-party applications and services), but still lets them use functions from an application. Interface is a core object oriented programming principle (OOP) used by many programming languages. When an application or client requests some information (data) to the API, the API redirects the request to the appropriate source and passes the received response to the client. However, it provides secure access to both. ![]()
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