Hmmm don't know much about that, never used it. I wrote this zap server below, and actively work on it if you're ever interested in trying. I need to figure out how the different clients are pulling this info and what they do with the zap receipt
https://github.com/UTXOnly/zap_server
Also going to throw this in a container and use it in my relay stack so i can have just 1 server. Will be pushing up those changes this week.