Modern applications rely heavily on APIs to connect services, exchange data, and deliver seamless user experiences. Whether you're building microservices or integrating third-party tools, testing these APIs becomes critical. In this guide, we’ll break down what is API testing in software , why it matters, and how it works in real-world development. What Is API Testing in Software? what is api testing in software is a type of software testing that focuses on verifying whether an Application Programming Interface (API) works as expected. It involves sending requests to API endpoints and validating the responses based on functionality, reliability, performance, and security. Unlike UI testing, which checks the visual interface, API testing operates at the business logic layer —ensuring that data is processed correctly and communication between systems works smoothly. In simple terms, API testing answers questions like: Is the API returning correct data? Are responses fast and reliable?…