LCAuth is a next-generation authentication plugin inspired by LimboAuth, designed for modern Minecraft servers and large-scale premium networks. Built with performance, security, and clean UI in mind, LCAuth delivers a smooth and professional login experience for both Java and Bedrock players.
Supporting Standalone servers, BungeeCord, and Velocity, LCAuth is optimized for Minecraft 1.21 → 1.21.11 and built using modern async architecture for maximum performance and low resource usage.
✨ Features
Modern Authentication System
- Secure register/login system
- BCrypt password encryption
- Login attempt protection
- IP registration limits
- Password strength checking
- Unsafe password blocker
- Mojang premium account detection
- Optional premium bypass system
- Premium account cache system
- Instant premium auto-login
- Full Floodgate support
- GeyserMC compatible
- Bedrock authentication support
- Floodgate auth bypass options
- Lightweight virtual auth world
- No chunk loading
- AntiBot optimized
- Smooth modern auth UI
- Adventure mode auth system
- Blindness effect support
- Beautiful centered login screen
- Animated actionbar countdown
- Professional auth titles
- Custom RGB/HEX color support
- Fully customizable messages
Everything configurable from:
config.yml
Customize:
- messages
- titles
- actionbars
- bossbars
- sounds
- auth settings
- premium settings
- floodgate settings
- security settings
LCAuth automatically provides:
Standalone Jar
For:
- Paper
- Spigot
- Purpur
For:
- BungeeCord proxy networks
For:
- Velocity modern proxy networks
Download package includes:
LCAuth.zip
/standalone/LCAuth-Standalone.jar
/bungee/LCAuth-Bungee.jar
/velocity/LCAuth-Velocity.jar
/config-example/config.yml
Optimized Performance
- Fully async optimized
- TPS friendly
- Lightweight architecture
- Optimized for large servers
- Fast startup times
- Low RAM usage
- AntiBot protection
- Packet limiter
- Session protection
- Secure authentication handling
- Password console hiding
- UUID support
Minecraft 1.21 → 1.21.11
Supported Platforms
- Paper
- Spigot
- Purpur
- BungeeCord
- Velocity
Java 21
Why LCAuth?
LCAuth combines modern authentication security, premium UI design, Floodgate compatibility, and high-performance async architecture into one complete authentication solution for Minecraft networks. Perfect for Lifesteal, Survival, Practice, BoxPvP, SMP, and large-scale server infrastructures.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21
- 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 Spigot — 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.
LCAuthMe is a free Minecraft Java mod. Compatible with Minecraft 1.21. Downloaded 256 times (via Spigot). Download it and open it directly in the game.