I trying to import weather data from openweather.org.

I found solutions how to import local json files. Is there any way to prepare expresion for reciving data from API?

My current code:

data = JSON.parse(system.callSystem('curl -s "https:/api.openweathermap.org/data/2.5/weather?q=london&appid=myapicode"'));
val = data.main.temp