Thanks Dan for your suggestions.
I've had a look at the Bernard Becker Medical Library Archives and it seems like a good setup. I'm not familiar with Aeon, using Reftracker and have been talking to them too but it seems there is something missing re the JSON arrays. I'm talking to others in-house with more knowledge on these things than I, so hopefully will find a solution. As mentioned, we have a 'request' URL set up and I have put that in the settings page, just not picking up the metadata.
I have tried POST & GET, both without success.
Thanks again
Michael, ArchivesACT Canberra