Man pages matching name xmlrpc::transport::http in section 3pm:

XMLRPC::Transport::HTTP.3pm.en	debian 10 / libxmlrpc-lite-perl
XMLRPC::Transport::HTTP.3pm.en	debian 11 / libxmlrpc-lite-perl
XMLRPC::Transport::HTTP.3pm.en	debian 12 / libxmlrpc-lite-perl