override LWP's HTTP/HTTPS backend with your own PSGI application

 LWP::Protocol::PSGI is a module to hijack *any* code
 that uses LWP::UserAgent underneath
 such that any HTTP or HTTPS requests can be routed
 to your own PSGI application.
 .
 Because it works with any code that uses LWP,
 you can override various WWW::*, Net::* or WebService::* modules
 such as WWW::Mechanize,
 without modifying the calling code or its internals.
 .
 PSGI is a specification to decouple web server environments
 from web application framework code.