Omnixerio Modding Library, also known as UltreonLib, is a Java Edition support mod that provides shared code and development utilities for mods created by the Omnixerio team. It is not a content expansion on its own, but a technical foundation that helps related projects work consistently.
The library supports Fabric, Forge, and NeoForge across several Minecraft releases, with client side, server side, and combined environments available. Some versions rely on Architectury API and may be required by Omnixerio projects such as devices or utility mods. On a Minecraft server, it mainly improves compatibility behind the scenes. At BoxToPlay, we recommend it when a selected modpack lists it as a dependency.
Select the version of Omnixerio Modding Library you want installed on your Minecraft server.
You go directly to your cart with the Minecraft plan and selected version of Omnixerio Modding Library already included. Check that everything is correct before continuing.
Wait while your Minecraft server is built and delivered. Installation of your selected Omnixerio Modding Library version starts during setup. Once it is ready, connect and have fun.
Create your Minecraft server and install the Omnixerio Modding Library mod with one click!