With this plugin, you can create a trade using the residents ' trading inventory, but not using them themselves. The plugin does not have a config. You can create and edit inventory using the commands (only for OP):
- Tested Minecraft Versions:
- 1.12
- Source Code:
- https://github.com/Uninstal/CustomMerchants
/merch create <id>
/merch edit <id>
/merch open <id> <player>
You can learn more about using the commands and the plugin here.

CustomMerchants 2021-03-10
Create a trade using the villager trade inventory.