The ability to quickly and effectively test APIs is a critical skill for software testers and QA engineers. In this intermediate-level course, instructor Dave Westerveld covers the basics of API testing, sharing how to work with several industry-standard tools for testing APIs at scale in an organization. After providing a primer on web services and important API terminology, Dave shows how to use Postman for some basic API exploration. He then goes over some basic approaches and methodologies used in testing GET, POST, PUT, and DELETE requests; discusses some of the details of performance and security testing; and more.