Which API is used in Selenium?

In Selenium, you primarily engage with the WebDriver API, which is a set of methods and instructions for controlling internet browsers. This API permits you to automate interactions with web factors, navigate through internet pages, simulate movements like clicking buttons or typing into textual content fields, extract records from internet pages, and perform diverse different tasks required for trying out or internet automation.

If you’re looking to integrate API testing with Selenium, you would typically use separate API testing tools or libraries specifically designed for that purpose. Some commonly used tools and libraries for API testing include:

1. REST Assured: A popular Java library for automating REST API testing. It provides a fluent API for making HTTP requests, validating responses, and writing test cases in Java.
2. Postman: A comprehensive API testing tool that allows users to create, test, and automate API requests. It provides a user-friendly interface for sending HTTP requests, inspecting responses, and validating API behaviour.
3. Requests (Python): A simple and elegant HTTP library for Python that allows you to send HTTP requests and handle responses easily. It’s commonly used for API testing in Python-based projects.
4. HttpClient (C#): A class library for sending HTTP requests and receiving HTTP responses in C#. It’s commonly used for API testing in. NET-based projects.

While Selenium itself is not an API testing tool, it can complement API testing efforts by integrating with API testing tools or libraries to create end-to-end testing scenarios that cover both the UI and backend API layers of a web application.