Prepare API Testing Instance or Environment Prerequisite software Download & Install JDK Download & Install IntelliJ IDEA Community Version Create Java(Gradle) Project in IntelliJ IDEA for API Create Java(Gradle) Project in IntelliJ IDEA Add Gradle Dependencies REST Assured Json Path TestNG lorem ipsum Json Simple Jackson Databind ExtentReports Create TestNG XML plugin install from Marketplace - File >> Settings >> plugin >> Marketplace >> search 'Create TestNG XML' & install Related Resource Getting Started Usage Guide Dummy API URL JSON Path Finder JSONPath Online Evaluator Extent Reports TestNG Best Demo API for Automation practice Dummy Rest API Example Go REST reqres.in Simple Grocery Store API Fakerestapi Swagger API Demo Sites for Automation practice Simple Grocery Store API Fakerestapi Run Test Case Run Test Case - Go to desired Java Class where has Test Case, Right click of mouse on Test Case >> click on Run Run XML File - After create TestNG file, Right click of mouse on TestNG xml >> click on Run