API testing

API Testing is a type of software testing that checks if two different software programs are connecting to each other correctly. It does this by sending a message from one program to the other, and then checking to make sure the answer it gets back is correct. For example, if you had two programs that both do math, it could send a question from one program to the other like "What is two plus two?" and then verify that the other program answers "four". API Testing makes sure that these questions get answered correctly and that the two programs can communicate with each other as expected.