How do I install YUNG's API (NeoForge) [1.20.4-1.21.1 ONLY]?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on CurseForge — not every file is mirrored on our own servers.

What Minecraft version does YUNG's API (NeoForge) [1.20.4-1.21.1 ONLY] work with?

The listing gives Minecraft 1.21, 1.21.1, 1.20.4. This is the version stated by the author or source site, not something we verified ourselves.

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YUNG's API (NeoForge) [1.20.4-1.21.1 ONLY]

Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.

by YUNGNICKYOUNG · on CurseForge

Which Minecraft do you have?

Every version of the game needs its own build. Pick yours, then download — the wrong build installs fine and then does nothing in the game. This mod is built for NeoForge only.

Minecraft 1.21–1.21.1Newest
Minecraft 1.20.4

⬇ Download for 1.21–1.21.1 ⬇ Download for 1.20.4

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

THIS IS FOR 1.20.4 - 1.21.1 ONLY. NEWER VERSIONS OF THIS MOD FOR NEOFORGE HAVE BEEN MOVED TO HERE.

YUNG's API (NeoForge) [1.20.4-1.21.1 ONLY] — Minecraft Java mod, screenshot 1

Click here for Forge version

Click here for Fabric version

This is a library mod for some of YUNG's NeoForge mods. It's basically a collection of shared utility functions and data abstractions. It is required for all YUNG mods. Check out my CurseForge profile to see all my mods!

For all you mod devs out there - This provides a lot of useful stuff, especially if you're a worldgen modder!

The API includes the following:

AutoRegistration system (1.18+ only). Register any field with only a simple annotation, regardless of mod loader!
Custom reimplementation of Jigsaw Manager with improved performance and custom pool element types with various new properties. Check out the Better Dungeons code to see it in action.
New criteria trigger for safely locating any structure. If the given structure doesn't exist, the trigger simply fails rather than instantly passing (unlike vanilla).
Interfaces for JSON serialization & deserialization with built-in type adapters.
Simple, lightweight math utilities for vectors and column positions
BlockStateRandomizer and ItemRandomizer, data abstractions that make adding block and item randomization to your structures incredibly simple. I use these for all of my mods!

If you're curious, you can check the code for my mods (especially the newer ones) to see how things work. Feel free to ask me any questions on Discord!

YUNG's API (NeoForge) [1.20.4-1.21.1 ONLY] — Minecraft Java mod, screenshot 2

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21, 1.21.1, 1.20.4
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as YungsApi-1.21.1-NeoForge-5.1.9.jar — drop this file into the mods folder
Download size: 404 KB
Download link checked 24 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

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