The API Request Tester is a powerful client-side utility for developers and testers to interact with and debug REST APIs. It provides a comprehensive interface to build and send various types of HTTP requests—including GET, POST, PUT, DELETE, and PATCH—and inspect the server's response. You can customize the request URL, add custom headers, and include a request body, making it an indispensable tool for API development and integration testing.

1. Enter the full URL of the API endpoint you want to test.
2. Select the appropriate HTTP method (e.g., GET, POST) from the dropdown menu.
3. To add request headers, click "Add Header" and fill in the key-value pairs.
4. For methods like POST or PUT, go to the "Body" tab and enter your request payload (e.g., JSON).
5. Click the "Send" button to execute the request.
6. The response from the server will be displayed below, separated into three tabs: Body, Headers, and Status.
7. You can view the response status code, size, and time taken, as well as all response headers and the response body.