How to get data from Wunderground with Rest?

Hi everyone, i managed a long time ago to integrate a Wunderground station into my HomeAssistant config, as the station is now offline since weeks, i just changed URL in the rest sensor but it does not work even if the station is online… do you have any hint on why?
Here’s my config:

- platform: rest
  name: Temperatura Esterna
  value_template: '{{ value_json.observations[0].metric.temp }}'
  unit_of_measurement: °C
  scan_interval: 300

this is very interesting.
In front of my house one user have a wunderground station and, it will be perfect if i can obtain the data of this station.

Eres español? me da la sensacion que si, por tu codigo, jeje