When testing API, it is not adequate to know only that clicking a button will send a request to the server. It is also important to understand the parts of a REST request, to know how to create, formulate, and send requests without depending on the UI, also to realize what to expect as an acknowledgment when sending a test request to make sure that the API is operating perfectly.
To build an efficient and linked customer experience, APIs are important and businesses are beginning to realize their importance. The importance of API testing has therefore come into place in order to understand the scope of its position with regard to applications.
This particular testing includes specifically testing the application interfaces as part of the integration testing to decide if the application meets the functionality, usability, reliability and security requirements perfectly. One of the most difficult testing practices in the software and QA phase is API testing, since it exposes glitches, anomalies, and deviations from the intended actions of the application.