I have found in some other posts that its not possible to add custom attributes to a proxy like you can an App but I'm looking for a way to tag a specific proxy with an attribute of some sort that can be consumed via a custom javascript policy. The specific use case is for logging. Depending on the proxy we'd like to be able to turn on and off more verbose logging based on some flag that is set somewhere that can be read by javascript.
If this isn't possible, we could have a minimal logging and verbose logging policy that could be added or removed from the API Proxy flow but we were looking for something a bit more dynamic.