YUNG’s API Wiki
YUNG’s API Wiki & Guide
wiki.9minecraft.net/yungs-api/
YUNG’s API provides shared code and tools that other mods need to work. It is a library mod that contains a collection of useful functions, especially for mods that change world generation. Features: Includes an AutoRegistration system that works with any mod loader. Offers a custom Jigsaw Manager w
Guides
Step-by-step, in-game.
How to Fix a Crash Caused by a Missing YUNG's APIRecognizing the Missing API Crash If your game crashes on startup or when loading a world and the crash log mentions…How to Install YUNG's API Correctly Alongside Other ModsWhere the API Belongs YUNG's API is a library, so it goes in the same mods folder as the mods that require it. It…How to Tell Which Mods Need YUNG's APIThe Dependent Mod List YUNG's API is required by a specific family of mods. If you have any of these installed, the…How to Troubleshoot YUNG's API Conflicts and World Gen ErrorsCommon Symptoms Because YUNG's API handles world generation helpers and structure placement for its dependent mods,…
Frequently asked questions
What does YUNG's API actually do if I can't play it?
It's a library mod, so it doesn't add anything you can see or craft on its own. Instead it provides shared code that other mods use, especially for world generation, structures, and JSON handling. If you have it installed alongside a mod that needs it, that mod will work; on its own it does nothing visible.
How do I know if a mod needs YUNG's API?
Check the mod's dependencies list on its download page or in your mod loader's mod list. Mods like YUNG's Better Caves, Better Mineshafts, Better Portals, Better Strongholds, Better Dungeons, Bridges, Extras, Traveler's Titles, and Paxi all require it. If a mod lists YUNG's API as a required dependency, you need it installed.
Do I need to configure YUNG's API after installing it?
No. It's a background library with no in-game config screen or commands you need to set up. Just having it in your mods folder is enough for the mods that depend on it to function.
Why does my game crash with a 'missing YUNG's API' error?
This means a mod that depends on YUNG's API is installed but the API itself is missing or not loading. Make sure the API file is in your mods folder, matches your Minecraft and mod loader version, and isn't disabled. If it's still crashing, check that you don't have two different versions of the API installed at once.