@siderea I'm used to dealing with APIs and from a glance at the docs you linked, looks like the headers to look for are the ones that return either the login cookie or the API key (if you have one.)
The Firefox dev tools (F12) network tab is a good way to look for those.
If you register with them it appears you can send an API key in the headers with a request to an endpoint.
I'm a fan of the RESTClient web extension for Firefox because it lets me populate headers.
Also, hell yeah, Perl script!