This mod removes the max counter from villagers, allowing you to trade with them as often as you want to. Your villagers will never run out out stuff to trade, and never have to restock - as long as you have trade goods or emeralds, villagers will want to trade for them.
Needs to be installed on the server. Does not need to be installed on the client.
WARNING: The mod works by changing the villager's trades list. This is permanent, and will remain even when you remove the mod again. If you're just testing the mod, only trade with throwaway villagers that you can kill if you don't like the mod and remove it.