Monitoring website on each server individually in a cluster

[sakuli123]

There is a Title of the website we are testing for example :

TitleOfTheWebsite"

Is it possible to check for each server in the cluster individually .We are currently using sakuli version 2.5.0

My boss is providing this solution but I am not sure if this is even possible:
The routing to the individual instances is done via a cookie on the respective domain, in the form key: ROUTEID, value: .rx1 to .rx3. If such a thing can't be set with Sakuli itself, there seems to be a fallback to Selenium that should do it: https://sakuli.io/docs/writing_tests/webtests/#selenium-fallbacks and then
driver.manage().addCookie("ROUTEID", ".rx1");

Please provide your suggestions