I have had to following configuration successfully running for some time on a debian machine. Since the last OH2 Update it seems that it is broken somehow or has at least some problems.
I’ve configured the item as follows and can call the url manually fine
The binding is installed. At least the GUI says that.
Logging seems also to be broken since the update because I do not see any entries in the log. I did not have the time to check yet.
As I remember it did work sporadically after the update, but currently nothing happens.