curl --request GET \
  --url 'https://api.wavix.com/v1/buy/countries?appid='

{
  "countries": [
    {
      "id": 8669,
      "has_provinces_or_states": false,
      "name": "Argentina"
    },
    {
      "id": 8650,
      "has_provinces_or_states": true,
      "name": "Australia"
    }
  ]
}