use SOAP::Lite +trace   =>      [qw(debug)];
SOAP::Lite->new(
   uri         => 'http://www.blah.nl/blah', # the namespace
   proxy       => 'https://www.blah.nl/servive/to/call',
   on_action   => sub {sprintf 'http://www.blah.nl/action'}) #soapaction header