In addition to manually entering the ui identifiers(like id, xpath, name, etc) a particular element(a button, text field, etc on a web page), Testsigma’s chrome extension enables to capture the attributes of an element easily.
Navigate to Applications-Version-Test Cases-Choose a Test Case that you wish to manually add the test steps to. Enter the desired steps and also the Expected Result(whether Passed/Failed.)
The video explains how a RESTful web service is created using Testsigma. Creation of a Test Case for Web Service/API Testing is no different that creation of a Test Case for a Web/Mobile Application.