HotbarAPI

API for adding Status Bars, highlighting hotbar slots, and more

17.5K Downloads

fabricgame-mechanicslibraryutility

Rent Server with this Mod

Screenshots

About this Mod

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.

Available Versions

HotbarAPI 1.5.0+1.20.1release

MC 1.20.1fabric

October 1, 2025

HotbarAPI 1.5.0+1.21.9release

MC 1.21.9, 1.21.10fabric

October 1, 2025

HotbarAPI 1.4.1+1.21.9release

MC 1.21.9fabric

October 1, 2025

HotbarAPI 1.4.1release

MC 1.21.6, 1.21.7, 1.21.8fabric

June 30, 2025

HotbarAPI 1.4.0-1.21.6release

MC 1.21.6fabric

June 20, 2025

How to Install HotbarAPI on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.10).

Install Mod

Open the mod browser in the dashboard and search for "HotbarAPI". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.10, 1.21.9, 1.21.8 (+3 more)

Server-side

~ Optional

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

HotbarAPI server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.10). You can switch loaders with one click in the panel.

Is HotbarAPI compatible with fabric?

HotbarAPI officially supports fabric for Minecraft 1.21.10, 1.21.9, 1.21.8. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with HotbarAPI – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if HotbarAPI consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.