Man pages matching name authen::simple::http in section 3pm:

Authen::Simple::HTTP.3pm.en	debian 10 / libauthen-simple-http-perl
Authen::Simple::HTTP.3pm.en	debian 11 / libauthen-simple-http-perl
Authen::Simple::HTTP.3pm.en	debian 12 / libauthen-simple-http-perl