Adding New Contacts via WD API


I’ve recently started looking into WineDirect’s API and I’m looking to add new Contacts to our Newsletter from another website.
I’m wondering how I would structure the API request to take the email addresses from our form (on another website) and add it to WineDirect automatically?

Definitely not my wheelhouse, but have you looked at this:

I may have briefly browsed it. I’ll dive in a little more.

Thank you for the reply.