Minecraft 1.21.4 has 385 API and Library mods on MineUniverse, with more than 9.3 billion downloads combined. GeckoLib is the most downloaded of them.
A flexible and expandable accessory/equipment API for users and developers.
Adds a Kotlin language loader and provides some optional utilities.
SuperMartijn642's Core Lib adds lots of basic implementations that allow for similar code between different Minecraft versions!
Config Lib makes dealing with config files just a bit easier.
A library mod for YUNG's Minecraft mods
Searchables is a library mod that adds helper methods that allow for searching and filtering elements based on components, as well as offering built …
A coremod and API to provide developers access to elytra flight mechanics through an entity attribute.
![Iceberg [Neo/Forge]](https://media.forgecdn.net/avatars/thumbnails/425/207/256/256/637653794535451378.png)
A modding library that contains new events, helpers, and utilities to make modder's lives easier.
A library mod for adding biomes in a simple and compatible manner!
SuperMartijn642's Core Lib
SuperMartijn642's Core Lib adds lots of basic implementations that allow for similar code between different Minecraft versions! updated Oct 14, 2026
MidnightLib
Common library with a built-in configuration system updated Oct 14, 2026
Threadcore API
The public API for Threadcore. Lets your mod schedule work on a region thread, defer mutations safely, and declare its own threading contra… updated Oct 14, 2026
CorgiLib
A library mod containing code used across Corgi Taco's mods. updated Oct 10, 2026
ManyIdeas Core
Contains blocks, tools and items, that are needed in many of the Many Ideas Mods. updated Oct 10, 2026
Recipes Library
A library adding implementations for recipes. updated Oct 10, 2026
Behind GeckoLib, the ranking continues with Cloth Config API (Fabric/Forge/NeoForge), Architectury API, Curios API and Collective.
With 385 of 10,132, API and Library mods account for 4% of all mods for 1.21.4. Split by loader, the numbers for 1.21.4 are Fabric 293, NeoForge 264, Forge 100 and Quilt 81. Some mods support more than one loader, so these numbers add up to 738, more than the 385 in total.
Recent activity: 22 API and Library mods (6%) got a new file for 1.21.4 in the last 30 days. Recently updated picks include SuperMartijn642's Core Lib, MidnightLib and Threadcore API. Mojang released Minecraft 1.21.4 on December 3, 2024. Against its nearest versions, 1.21.4 has 814 fewer API and Library mods than 1.21.1 (1,199) and 124 fewer than 26.1.2 (509).
By downloads, the leading API and Library mods for Minecraft 1.21.4 are GeckoLib, Cloth Config API (Fabric/Forge/NeoForge), Architectury API, Curios API and Collective.
MineUniverse currently has 385 API and Library mods for Minecraft 1.21.4. Recent activity: 22 API and Library mods (6%) got a new file for 1.21.4 in the last 30 days. Together they have more than 9.3 billion downloads.
1. Install the mod loader the mod is made for (Forge, Fabric, NeoForge or Quilt) for your Minecraft version. 2. Download the mod file (.jar) that matches your Minecraft and loader version. 3. Put the .jar into the mods folder of your Minecraft directory (.minecraft/mods). 4. Start Minecraft with the loader profile selected in the launcher.
Fabric leads with 293 mods, followed by NeoForge (264), Forge (100) and Quilt (81). Some mods support more than one loader, so these numbers add up to 738, more than the 385 in total.
Yes. All 385 API and Library mods for Minecraft 1.21.4 on MineUniverse are free to download.
