+1 for this http://www.wunderground.com/weather/api/

I'm getting the same error message when I access my devices, sensors are working without a problem. This is the result from api.telldus.com 
{"client":[{"id":"118340","uuid":"1fcf1b59-3443-466f-9a0e-4adef2b7db3c","name":"AP224","online":"1","editable":1,"extensions":1,"version":"17","type":"TellStick Net","ip":"46.9.XXX.XXX"}]}
(IP address masked)