I am new to Breeze and I'm trying to come up with a proof of concept that will allow an agent to log into their phone, register their station with ECC and listen for call events for their station. when an alert event happens, answer the call and get the UCID for the inbound call. This UCID will need to be passed to a screen pop app to pull in account information from the backend.

Does something already exist or will I have to build this from scratch?

Hi,
Thank you for your question.

Do you mean ECC is Engagement Call Control?

ClientSDK doesn't expose CallID used in SIP session it is encapsulated by ClientSDK. So unfortunately you can't simply get unique id of call.

I suppose by ECC 1buckeyefan meant Elite Call Center.
And UCID is special parameter passed in SIP in User-to-user header.
CSDK doesn't support this feature.