What is API Automation testing

Definition

API automation testing is the practice of writing scripts that send requests to an API and automatically verify the responses — status codes, headers, and body content — without manual intervention.

How It Differs From Manual API Testing

Manual testing (e.g., in Postman) is exploratory and quick to set up but doesn't scale well for regression; automated tests (e.g., in Rest Assured) run repeatedly, reliably, and can be integrated into a build pipeline.

Typical Tools

Common tools include Rest Assured (Java), Postman/Newman, and various framework-specific HTTP client libraries.