This works in Xcode 16 now.

My UI tests on iOS require few commands to be executed on host Mac Terminal during execution. I am trying to achieve this via Bonjour Services where my UI Test on iOS will connect to the Bonjour service on host Mac and send commands to be executed. Is there any workaround to run Bonjour services within UI Test Bundle ?

From my Testing, ckSession itself is ckWebAuthToken Encode and append the ckSession string that you received to future requests. To URL encode the ckSession string, replace '+' with '%2B', '/' with '%2F', and '=' with '%3D'. For example, send a request to get the current user by appending the ckWebAuthToken string.