Why Your Backend in Node.JS Needs an API Layer and How to Build It

A backend API layer centralizes the logic for making API calls in a Node.js application, reducing code duplication and enhancing maintainability by encapsulating all API interactions in one place. This architectural layer allows backend systems to communicate with external services via APIs more efficiently by using a Promise-based HTTP client like axios, supporting features such as retry logic and custom error handling. The API layer simplifies integration with third-party services, improving code quality by centralizing API call logic, thereby making it easier to update when endpoint changes occur and minimizing the potential for human error. Additionally, it facilitates easier implementation of features like retry logic for handling server-side errors. By organizing API interactions into a dedicated layer, developers can maintain a cleaner codebase and adapt quickly to changes in external services or APIs.