The Gurock TestRail API allows users to integrate automated tests into their applications, along with functions for submitting test results and automating various aspects of TestRail. TestRail is a test case management service designed for QA and development teams. It allows teams to manage, organize, and track their testing efforts from a central location, making testing more efficient. Users can execute tests and track the results with built-in, real-time reports and metrics. Test Rail is designed for integration with bug trackers and other testing systems.