Fetch constants directly from the web as JSON?

Hello all,
nowadays many web portals have API’s that can provide useful information with HTTP GET or POST as JSON response. The example are currency exchange rates, or meteorological info.
Would it be possile to parse JSON output of a web site and store it as constant in calc?

The Answer is Yes, its possible!
python is integratet in LO, for help on Details we need …… Details!!