The full dataset can be retrieved from the API by running the GetCountries_Full timer in Country_API module through ServiceCenter. The request is saved and later processed. 

It is possible to get a selection of attributes from the API. Use the GetCountries_Filtered timer instead. The attributes retrieved can be changed by changing the assign in the action.

The binaries of the flags can be retrieved after an initial load through the ProcessFlagImages timer in Country_BL module. This retrieves the images from the URL and stores it in the database.

Further documentation of the API:

https://gitlab.com/restcountries/restcountries

https://restcountries.com/

Based on v3.1 of the API

The restcountries.eu endpoint no longer works as it has been bought by a company and is no longer available.