A Visual Guide to API Testing API Testing checks if software APIs work right — in terms of functionality, performance, reliability, and security. It makes sure APIs send correct data, respond fast, handle errors, and stay secure. API Testing tests how different apps talk to each other behind the scenes. For example: Shopping App + Payment App, Game App + Friend List App, Weather App + Weather Server, or Maps App + Traffic App. Unlike traditional testing that looks at what users see (GUIs), API testing works behind the scenes. It tests the message layer, where apps send and receive data. Why It's a Game-Changer 🐞 Find Bugs Earlier Catch defects at the source, reducing cost and time. 🚀 Accelerate Feedback Faster than UI tests, boosts CI/CD speed. 🛡️ Boost Test Coverage Test backend logic beyond UI limitations. The API Testing Workflow Read Docs Choose Tool Build Request Validate Response Automate! Read Docs – Understand API endpoints. Choose Tool ...