There is a module for each site. They have similar actions: DownloadFlag with parameters:

-Country (two letter code from ISO 3166-1)

-Size in pixels (16,32,64)

-Theme (Shiny or Flat)

and returns a binary with the image.

The module Countries Information (for now only returning the flag) has actionGetCountryFlag that is similar to those, but it caches the files on it DB, in case the sites get unavailable.

At the moment it is targeting the .com site, but if the .io returns it can be changed.