What Is API Testing?

API testing involves verifying that the application programming interfaces function as intended by testing their endpoints, data flow, and response handling. It includes testing for functionality, performance, security, and reliability to ensure the API meets the requirements in software development.

API security testing involves assessing vulnerabilities such as authorization flaws, data exposure, and improper error handling. Techniques include penetration testing, fuzz testing, and validating the implementation of security standards like OAuth and SSL/TLS.

Manual test cases for API testing involve documenting test scenarios, preparing test data, and executing tests using tools like Parasoft SOAtest. Testers manually verify API responses, error handling, and data accuracy.

API testing automation involves using tools like Parasoft SOAtest, or tools integrated into testing frameworks like JUnit or TestNG to automate the execution of API test cases, ensuring the functionality and reliability of APIs.

Test coverage in API testing measures the extent to which an API’s features and functionalities are tested. It ensures that critical paths and potential issues are addressed.