Artica ensures the health of the nagios client, but reduces its configurability. In fact, the Nagios Client provides its own administration interface for setting all the Nagios client options.
On the left menu, choose “Your System” > “Nagios Client”
The most important parameter is the API Key, the API key allows you to logon on the Web Local agent administration console and to connect your Nagios server to the Agent.
Click on the field and change the API Key to the desired one.