Cannot get OpenWeatherMap uploader working

[Uwe S.]

Hi all,

i wanted to feed openweathermap with my data and wanted to use the owm extension.

Install went fine, but i am struggling at the point with Postman to identify the unique station ID

So i followed the instructions and used the link 
http://api.openweathermap.org/data/3.0/stations?appid=xxxxxxxxxxx

Where the xxx is replaced by the API key i have generated.

But in the appropriate body tab below it only gives me  this as result in the raw field:

{"code":415001,"message":"unsupported media type"}

And idea what i am doing wrong would be appreciated.