Beyond the 200: An Advanced Guide to API Testing.

A 200 tells you far less than most tests assume. This four-part series goes beyond status codes to show what strong API testers check and why. It covers test design, contracts and test data, security testing with the OWASP API Security Top 10, and robustness under concurrency and delay. The ideas work in any tool, from Postman to REST Assured to Playwright.