Slot Customization API

A small API for mods to dynamically modify inventory slots. Allows changing the position, disabling/enabling slots and adds tooltips for empty slots.

65.4K Downloads

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Rent Server with this Mod

About this Mod

A small API for mods to dynamically modify inventory slots. Allows changing the position, disabling/enabling slots and adds tooltips for empty slots.

How to use

Casting a "Slot" to the "SlotCustomization" interface gives access to all relevant methods.

Available Versions

4.1.0release

MC 26.1, 26.1.1, 26.1.2fabric

April 26, 2026

4.0.1release

MC 26.1, 26.1.1, 26.1.2fabric

April 15, 2026

4.0.0release

MC 26.1fabric

April 15, 2026

3.1.0release

MC 1.21.11fabric

December 22, 2025

3.0.0release

MC 1.21.10fabric

October 23, 2025

How to Install Slot Customization API 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 (26.1.2).

Install Mod

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

Compatibility

Mod Loaders

fabric

Minecraft Versions

26.1.2, 26.1.1, 26.1 (+6 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Slot Customization API 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 (26.1.2). You can switch loaders with one click in the panel.

Is Slot Customization API compatible with fabric?

Slot Customization API officially supports fabric for Minecraft 26.1.2, 26.1.1, 26.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Slot Customization API – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Slot Customization API 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.