Curl? Better Postman
In the Course: Rails API, Why do you use Curl?, is not easy to understand at the first time, and users that don't have Unix Systems is very difficult to get it. Better use "Postman" is more easy and powerful. I use it in my Mac
Curl is just the default tool that ships with all Unixy systems. When working with an API, it doesn't really matter what request tool you use (as you've demonstrated). Jason probably used Curl simply because it's more accessible than other tools, being the default.
I will check out Postman, though. It sounds pretty cool!
Thanks for the quick answer, is great to know that we are listened (Sorry for my bad english)