We want use this mod on our server and use the creative shops as admin shops.
Now I don't use a extra Admin Account and I will get always a notification then player buy stuff.

And is there no config file at all for shoppy? :O

for bartering stations you can use /data modify block <x> <y> <z> owner set value [I;0,0,0,0]

and for shops you can use /shoppy npc_shop

but i'll consider it for the future