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Intercept requests to localhost

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By default, Chromium-based browsers such as Microsoft Edge and Google Chrome bypass system proxy settings for localhost URLs. If you're developing an application that makes requests to API on localhost, which you want to intercept using Dev Proxy, you need to exclude localhost URLs from the bypass list.

To configure Chromium-based browsers to send requests to the system proxy for localhost URLs, you need to start the browser with the --proxy-bypass-list and --proxy-server options. For example, to exclude localhost from the bypass list in Microsoft Edge, start the browser with the following command:

msedge --proxy-bypass-list="<-loopback> --proxy-server="127.0.0.1:8000"

/Applications/Microsoft\ Edge.app/Contents/MacOS/Microsoft\ Edge --proxy-bypass-list="<-loopback>" --proxy-server="127.0.0.1:8000"

/opt/microsoft/msedge-dev/msedge --proxy-bypass-list="<-loopback> --proxy-server="127.0.0.1:8000"

To configure Mozilla Firefox to send requests to the system proxy for localhost URLs, you need to set the network.proxy.allow_hijacking_localhost preference to true. To do that, open the about:config page in Firefox, search for the network.proxy.allow_hijacking_localhost preference, and set it to true.