ModsFinder

Slot Customization API

by TheRedBrain

Slot Customization API lets other Fabric mods change inventory slots at runtime, including their position, whether they are enabled, and the tooltips shown for empty slots.

FabricClient and serverMIT LicenseOpen source1.20.1 – 26.1.2

What it does

Small API mods can change inventory slots while the game runs, without a restart. The library gives access to the methods that handle this through the SlotCustomization interface, which mods cast onto their slot objects. The server and every player need the mod installed. Fabric is the only loader with files, and the newest build, 4.1.0, targets 26.1.2 and was released on 2026-04-26. The code is released under the MIT License and is open source.

Key features

  1. Moving slots

    Mods can change where a slot sits in the inventory screen while the game is running.

  2. Enabling and disabling slots

    Individual slots can be switched on or off, so a mod can lock part of an inventory.

  3. Tooltips for empty slots

    Empty slots can show a tooltip, which lets a mod explain what belongs in them.

Compatibility

Latest build for each game version and loader.

26.x3 of 3 versions with builds
26.1.24.1.0
26.1.14.1.0
26.14.1.0
1.21.x4 of 4 versions with builds
1.21.113.1.0
1.21.103.0.0
1.21.12.2.0
1.212.0.0
1.20.x2 of 2 versions with builds
1.20.61.0.0
1.20.11.0.0-1.20.1
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 2

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required
Fzzy ConfigConfig API with automatic GUIs, powerful validation options, server-client sync, and more!
Required

Required by 6 mods

RPG Inventory1.20.1 – 26.1.2Backpack Attribute1.20.1 – 26.1.2Inventory Size Attributes1.21.1 – 26.1.2RPG Enchanting1.21.1 – 26.1.2RPG Crafting1.21.1Script Blocks1.20.1 – 1.21.1

Questions

Does Slot Customization API need Fabric API?

Yes. Fabric API and Fzzy Config are both required dependencies, and both must be installed alongside this library.

Which mods depend on Slot Customization API?

Six catalog mods require it, including RPG Inventory, Backpack Attribute, Inventory Size Attributes, RPG Enchanting and RPG Crafting.

Does the library have to run on the server?

Yes. A server running it needs every connecting player to have it too.

In the catalog

Slot Customization API is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 15,189 mods support Minecraft 26.1.2.

Library mods3,514Fabric modsMods for 26.1.215,189

More from TheRedBrain

All projects
Shield API1.20.1 – 1.21.4Bundle API1.21 – 26.3Better Combat Extension1.20.1 – 1.21.1RPG Inventory1.20.1 – 26.1.2Resource Bar API1.20.1 – 26.1.2Stamina Attributes1.20.1 – 26.1.2

Similar mods

Fabric API1.14 – 26.3Cloth Config API1.14 – 26.3YetAnotherConfigLib (YACL)1.19 – 26.3Architectury API1.16.5 – 26.3Just Enough Items (JEI)1.8 – 26.3Geckolib1.12.2 – 26.3

What the author says

A small API for mods to dynamically modify inventory slots. Allows changing the position, disabling/enabling slots and adds tooltips for empty slots. Casting a "Slot" to the "SlotCustomization" interface gives access to all relevant methods.
TheRedBrain, on the Modrinth page

Official listing

Owner
TheRedBrain
Published
2024-05-02
Updated on Modrinth
2026-04-26
Facts verified
2026-10-15

Tags

CursedLibraryUtility
Open on ModrinthCompare