The node.js request module supports proxies. There are a couple of different ways to enable this. I find this approach nifty as it doesn’t involve changes to the app or the app’s config.
Open a Windows command prompt and type the following commands.
Now if you execute your node.js application from within this command shell while Fiddler is running, you will be able to sniff the the traffic that your app is initiating.
When you are done, you can simple close the command shell session or type the following to reset the proxy settings.