How do I post a cURL request from Unity?

I am considering implementing a system like [Gumroad][1] for license administration in my end software but to communicate with it's API I need to send cURL commands such as: curl https://api.gumroad.com/v2/licenses/verify I notice a number of other similar organisations to Gumroad also all seem to use cCURL to access their apis (SendOwl for example) It seems quite important so how on earth do I do this from Unity? Thanks [1]: https://gumroad.com/features#_=_