LWP::ConsoleLogger::Everywhere lets you debug LWP and Mojo UserAgents you don't even know about. Now we also have support for HTTP::Tiny.

You can either add UserAgent debugging to your code directly or, through the magic of perl’s -M you can invoke it on the command line without touching a single line of code.

The guts of this module are stolen from Plack::Middleware::DebugLogging,