use LWP::Simple qw' get $ua ';
$ua->add_handler( "request_send",  sub { shift->dump; return });
get('http://example.com/');
__END__
GET http://example.com/
User-Agent: LWP::Simple/6.00 libwww-perl/6.05

(no content)
GET http://www.iana.org/domains/example/
User-Agent: LWP::Simple/6.00 libwww-perl/6.05

(no content)
GET http://www.iana.org/domains/example
User-Agent: LWP::Simple/6.00 libwww-perl/6.05

(no content)