
Modrinth · Minecraft mod
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.
Quick answer
Which Slot Customization API release should I use?
Slot Customization API 4.1.0 targets 26.1, 26.1.1, 26.1.2 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. All 3 required mods have matching files.
Where it goes
Is Slot Customization API required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Slot Customization API 4.1.0 need?
4.1.0. Change the file and its required mods may change too.
Install Fzzy Config, Fabric API, Fabric Language Kotlin first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
1 extra mod was pulled in by another dependency. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Slot Customization API without breaking your instance.
Built for Slot Customization API 4.1.0. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 4.1.0. It targets 26.1, 26.1.1, 26.1.2 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fzzy Config, Fabric API, Fabric Language Kotlin first. We found matching files for this game-version and loader setup. 1 comes through another mod in the chain.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 4.1.0. It opens that exact file at the source.
About this project
What does Slot Customization API add?
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.
Project description from Modrinth.
Pick your setup
Slot Customization API by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.1
1 loader build1.21
1 loader build1.20.6
1 loader build1.20.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Slot Customization API versions and loaders
4.1.0
slot-customization-api-4.1.0.jar
26 Apr 2026
4.0.1
slot-customization-api-4.0.1.jar
15 Apr 2026
4.0.0
slot-customization-api-4.0.0.jar
15 Apr 2026
3.1.0
slot-customization-api-3.1.0.jar
22 Dec 2025
3.0.0
slot-customization-api-3.0.0.jar
23 Oct 2025
2.2.0
slot-customization-api-2.2.0.jar
3 Jul 2025
2.1.0
slot-customization-api-2.1.0.jar
31 Aug 2024
2.0.0
slot-customization-api-2.0.0.jar
14 Jun 2024
1.0.0-1.20.1
slot-customization-api-1.0.0-1.20.1.jar
11 May 2024
1.0.0
slotcustomizationapi-1.0.0.jar
3 May 2024
Looking for an older file? The official Modrinth project page is in Resources.