ModsJava
NexAuth
Open-source, multiplatform, and highly customizable minecraft authentication plugin with outstanding features and API.
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.
NexAuth
An updated fork of LibreLogin is an open-source, multiplatform, and highly customizable authentication plugin with outstanding features and API.
Quick information
Basic set of features
- AutoLogin for premium players
- TOTP 2FA (Authy, Google Authenticator...) details
- Session system
- Name validation (including case sensitivity check)
- Automatic data migration for premium players
- Migration of a player's data by using one command
- Geyser (Bedrock) support using Floodgate
Considerations
- When using on proxy, you need to secure your limbo
Platforms
- Velocity
- BungeeCord
- Paper
Special thanks
- kyngs - for developing the original LibreLogin Minecraft plugin.
- Raixo - for developing the original bungeecord port
- FastLogin contributors - for their work, which was used as a base for the paper port
- Fejby - for providing Floodgate test server and helping with testing
License
NexAuth is FOSS, licensed under the Mozilla Public License 2.0.
The plugin is and always will be completely open-source, so you don't need to worry about malicous copies.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.13, 1.13.1, 1.13.2
- 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.
Verified by MCModsHub
- Ships as NexAuth.jar — drop this file into the mods folder
- Download size: 874 KB
- Download link checked 29 Aug 2026 — working
These come from our own check of the pack file, not from the source page.