![]() Ruby on Rails, which is often simply called “Rails,” is a good framework to use when building your first API because it abstracts away much of the complexity of common API development tasks, such as routing and database access. For the sake of this tutorial, we’ll use Ruby on Rails to create a simple REST API for the pet tracker app we designed above. Additionally, APIs can be written in almost any programming language, including Node.js, Python, Java, and Ruby. For instance, REST is the most popular API architecture, but Webhooks, GraphQL, SOAP, and gRPC are quite popular, as well. We might create a diagram that looks something like this:ĪPIs can be built using a wide range of programming languages, architectures, and protocols. For instance, let’s pretend we run a pet daycare business, and we’d like to build an API to help us keep track of pets and their owners. It can sometimes help to create a diagram of your API’s resources and relationships. ![]() For more sophisticated, production-level APIs, you’ll also want to consider things like authentication and encryption to ensure your data remains safe and secure. The next step is to decide which resources are required, how their data should be formatted and structured, how they should relate to one another, and which methods should be available on their associated endpoints. It’s therefore crucial to understand your API’s use case and scope before choosing an architecture, protocol, and programming language. For instance, an API that handles bi-directional video streaming will have very different requirements than an API that is responsible for an authentication workflow. The first step in the API design process is to gain clarity on what you need your API to do. This tutorial assumes you have some basic familiarity with the Ruby programming language and the command line. We’ll also review how you can use the Postman API Platform to test the API you’ve just built. ![]() Here, we’ll show you how to build a simple REST API, with a focus on API design and implementation. API development is therefore a crucial skill for anyone who wants to break into the tech industry. Whether you’re placing an order through an e-commerce store, requesting a car from a rideshare app, or ordering delivery from your favorite restaurant, you’re using APIs. APIs have been around for decades, but they now function as the primary building blocks of all modern applications. An API, or an application programming interface, is a set of code-based instructions that enable different software components to communicate and transfer data.
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