ModsJava
ULTIMATE AUTH
Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.
⬇ Download on ModrinthUltimateAuth is a powerful, modern authentication system for offline-mode Minecraft servers. Packed with security features, full spawn control, IP-based registration limits, movement lockdown, blindness effects, and a polished user experience.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20, 1.20.1, 1.20.2
- 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 Modrinth — 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 UltimateAuth-3.2.0.jar — drop this file into the mods folder
- Download size: 15.3 MB
- Download link checked 19 Oct 2026 — working
These come from our own check of the pack file, not from the source page.