Due to coronavirus many of logistics providers in Europe have been forced to close a lot of pickup/service points. From PostNord side we have updated our service point API accordingly.
PS: Now you are able to get information again about service points outside the Nordics via the findNearestBy or getServicePoint APIs.
The only countries which still have their service points locked down is Great Britain so those service points are still not available.
The sandbox is a free testing environment that is designed to mimic the live environment as closely as possible, so you can test your API integration.
You use the sandbox by providing a special sandbox API KEY that is different from production API KEY when sending requests to the API.