[heinrichf]

Let us also mention the great mitmproxy, an open source equivalent to the Charles proxy: https://github.com/mitmproxy/mitmproxy / https://mitmproxy.org/

[bugmenot3]

My go-to has always been Fiddler[1] (for windows). I wish it were open-source though.

I'll give mitmproxy a try. Thanks!

[1] http://www.telerik.com/fiddler

[_pmf_]

Fiddler is amazing!

[illicium]

Another option is Burp Suite (https://portswigger.net/burp/ ) -- ubiquitous in the security world.