@waltervl i can't believe I've missed this one, thanks for pointing it out, it worked.

Hi all, I used dzvent sendtoURL to control devices on another Domoticz server that I have, but because of the authentication changes in the recent versions of Domoticz I can't get my dzvents to authenticate to the API of the other Domoticz anymore. The 2 Domoticz servers communicate thru public IPs ...