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A complete guide to API testing from zero to production-ready. Covers HTTP fundamentals, manual API exploration with Postman, automated testing with pytest, REST authentication and error handling, GraphQL and gRPC testing, and building comprehensive API test suites that run in CI/CD.

The book is written to be approachable if you are early in your QA career — no prior expertise is assumed — while staying dense enough to serve as a working reference for practitioners.

This is Book 14 of 26 in The Modern QA Engineer Skillset — the \"Technical Foundations\" track of a series mapping the complete 2026 QA skill set, from AI-augmented automation to career strategy. Each book stands alone; together they form the curriculum behind modernQAcourse.com.

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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