How to Trace/Capture Web Service & REST HTTP Requests Using Fiddler in 3 Easy Steps

1) Download the awesome Fiddler app from here: Fiddler @ Telerik

2) Install Fiddler, then right-click its shortcut icon and click Run as Administrator.

3) Add the following configuration section within the system.net node of your web.config:

<defaultProxy>
<proxy bypassonlocal="false" usesystemdefault="false" proxyaddress="http://127.0.0.1:8888" />
</defaultProxy>

This section tells your server-side code to use Fiddler (running on its default port of 8888 on localhost) as its proxy for the server-side HTTP requests it makes.

Make your web service or REST calls and enjoy!