REST API Testing
REST API testing verifies APIs built on the REST architectural style — checking that endpoints correctly handle standard HTTP methods (GET, POST, PUT, DELETE), return appropriate status codes, and manage resources as the REST model expects (predictable URLs, stateless requests, correct use of HTTP semantics).
Because REST leans heavily on HTTP conventions rather than a custom protocol, testing it means testing adherence to those conventions as much as testing business logic — does a GET request have no side effects, does a DELETE actually remove the resource and return the right status, does a PUT correctly replace (not just update) the target resource.
Postman remains the most common tool for both manual exploration and automated REST API test suites, though many teams also write REST tests directly in their application's own language and test framework (REST-assured for Java, requests + PyTest for Python) for tighter CI integration.
