Most beginners think building a backend is complicated. It looks scary from the outside. Servers, routes, databases, requests, responses, it feels like a lot. But here is the truth. Building your first REST API in Node.js is simpler than you think. You just need the right guide and a willingness to write some code. This article is a complete Node.js REST API tutorial for absolute beginners in 2026. Are you a student building your first portfolio project? A hackathon participant who needs a strong backend? Or a developer who wants to understand how APIs actually work? This guide is for you. By the end of this article you will have a working REST API running on your machine. You will understand every line of code you wrote. And you will be ready to take it further. Let us get started. What is a REST API and Why Should You Care? Before you build something you need to understand what it actually is. Imagine you are using a weather app on your phone. You open the app and it shows you today's temperature.…