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API Testing

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May 1, 2024 Updated June 22, 2025 24 minute read

An Introduction to API Testing

API testing is a type of software testing that directly examines Application Programming Interfaces (APIs) and is part of integration testing to determine if they meet expectations regarding functionality, reliability, performance, and security. Essentially, it involves sending requests to one or more API endpoints and then comparing the response with expected results. This process is crucial because APIs act as the central nervous system for modern software, enabling different software components and systems to communicate and exchange data with each other.

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Reading list

We've selected five books that we think will supplement your learning. Use these to develop background knowledge, enrich your coursework, and gain a deeper understanding of the topics covered in API Testing.
Provides a comprehensive overview of API testing, covering topics such as test design, execution, and automation. It is written by a leading expert in API testing and is considered one of the best books on the subject.
Practical guide to API testing using Postman, a popular API testing tool. It is written by an experienced API testing expert and great resource for anyone who wants to learn how to use Postman for API testing.
Practical guide to API testing using Cucumber, a popular API testing tool. It is written by an experienced API testing expert and great resource for anyone who wants to learn how to use Cucumber for API testing.
Practical guide to API testing using Selenium, a popular web testing tool. It is written by an experienced API testing expert and great resource for anyone who wants to learn how to use Selenium for API testing.
Practical guide to API testing using RestAssured, a popular Java library for API testing. It is written by an experienced API testing expert and great resource for anyone who wants to learn how to use RestAssured for API testing.
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