HotbarAPI

HotbarAPI is an API that:

• Allows easy partially-data-driven registration of Status Bars.
• Allows highlighting hotbar slots based on integer or item. (Unsupported on 1.21.6)
• more soon™

HotbarAPI can be used as a client side mod, or can receive custom status bars from the server (but they still have to be registered on the client)

Its recommended to use HotbarAPI Compatibility for compat with other mods.