I got this to work (sort of. See my edit at the end).
I am using a ITC431-RW1F-IRL8
software version 5.000.0000000.1.R, Build: 2025-03-12 11:13:25
ITSAPI protocol version V1.19
My problem has been that I can define a path for the keep-alives, and I was able to receive those, but I could not define a path for the ANPR data. See below:
See where I've defined the keep-alive location as /NotificationInfo/KeepAlive. Well, I'm using Node Red, which only listens for webhooks on paths relative to /endpoint. So, when I had set the server at the top of the ITSAPI page to...