Fairly new to all of this customization, but have a good grasp on the basics. Anyway my question is:

Could this free service that uses json be used in a module to auto-complete city state and country fields in the creat partner view?

Link to the service with sample code: http://www.zippopotam.us/

Nice example: http://www.zippopotam.us/static/sample_us.html 

If anyone could show me how this could be included in a custom module I would be very thankful.