REST API Tutorial: Build Your First API with Node.js (2026)

In 2026, REST remains the predominant choice for building public APIs due to its simplicity, scalability, and widespread familiarity among developers. REST APIs facilitate communication between software applications using HTTP requests, with data typically exchanged in JSON format. The architecture is defined by six constraints: uniform interface, client-server separation, statelessness, cacheability, layered system, and optional code on demand. This tutorial provides a step-by-step guide to building a REST API using Node.js and Express, covering the implementation of CRUD operations via HTTP methods like GET, POST, PUT, and DELETE. Despite emerging alternatives like GraphQL for complex data fetching, gRPC for service meshes, and MCP for AI agent traffic, REST's low-friction integration and extensive tooling support make it the preferred option for public APIs. The tutorial emphasizes the importance of monitoring and monetizing APIs as they grow, highlighting tools like Moesif for observability and billing integration.

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