SaaS modules too, a lot of services have their API modules and examples provided in various languages. Perl is often not one of them. In some cases where it is, it's out of date or plain old broken. As an example (which is understandable, no hard feelings) I had to edit the SendGrid modules to fix a bug when I tried, and there were issues on GitHub that have been ignored since before it became officially unsupported in 2016.

I usually use Python these days when dealing with SaaS apps since the ecosystem is much better, and I want to learn it anyway.