Using your browser to execute your APIs is nice enough for simple APIs that retrieve data, but as you go along and extend your APIs, you'll soon find that you need other powerful tools to test and debug what you develop. There are many tools that let you inspect and debug your APIs, but I have chosen to teach you about Fiddler and Postman because they are both simple and powerful.
Fiddler is a free web debugging tool that works as a proxy, logging all HTTP(S) traffic that is executed by processes in your computer. Fiddler allows you to inspect the traffic to see that exact HTTP request that was sent and the exact HTTP response that was returned. You can also use other advanced features, such as setting breakpoints and overriding the data that is sent or received.
To install Fiddler, navigate to https://www.telerik.com/fiddler and click the Free download button. Save and run the installer:
The Fiddler main screen is built from these main...