Vault Plugin

As it says in the description on the plugin page - “Vault is a Permissions, Chat, & Economy API to give plugins easy hooks into these systems without needing to hook or depend on each individual plugin themselves..”

If you want to display prefixes on a player server, or if you use an economy on a server, install Vault, because you will almost certainly need it.

Although the plugin hasn’t been updated in years, it’s fine. The plugin works on newer versions without any issues.

To use placeholder for money/prefix, if you have Vault installed, you can use Vault placeholders see list of them here.

You can learn more about Vault here.