Looking for feedback - Kickass API integration and composition

Hey guys, I'd be glad if you could give this site here a glance and let us know what we can improve.

http://clayio.com

We're working on a prototype at the moment and would love a little bit of input. We're focusing on helping technical users build API integrations by providing them with graphical tools to manipulate inputs and outputs and expose new endpoints automatically.
Thanks for your attention!