FlexLogin

🛡️ FlexLogin — Authentication Reimagined

Military-Grade Security • Native Paper & Velocity Support • Premium Player Experience

100% Free Forever • No Paywalls • No Premium Version • No Hidden Features

FlexLogin is a modern authentication platform built for Minecraft servers that refuse to compromise.

Instead of simply asking players to enter a password, FlexLogin delivers a complete authentication experience with enterprise-grade security, native proxy authentication, intelligent antibot protection, beautiful interfaces, and seamless network-wide account management.

Whether you're running a small survival server or a large Minecraft network, FlexLogin keeps your players secure while providing a polished login experience they'll actually enjoy.

✨ Why FlexLogin? 🛡️ Enterprise Security

Argon2id hashing • Two-Factor Authentication • Session Protection • Device Trust • IP Binding • Brute Force Protection

🌐 Built for Networks

One plugin for Paper & Velocity • Login Once Across Your Network • Native Proxy Authentication

🤖 Advanced AntiBot

Physics Verification • Adaptive CAPTCHA • Smart Attack Detection • Automatic Protection

🎨 Premium Experience

Cinematic Login World • Modern GUIs • PIN Login • Anvil Login • Fireworks • Sounds • Tutorials

☁️ Optional Cloud

Live Dashboard • Encrypted Backups • Login Analytics • In-Game Updater

⚙️ Intelligent Auto-Configuration

Forget editing endless configuration files.

FlexLogin automatically detects your environment and configures itself using the safest and most optimized settings.

Automatically Detects Paper or Velocity SQLite or MySQL LimboAPI Floodgate Premium Authentication FastLogin ProtocolLib Network Environment

Simply install FlexLogin, start your server, and everything is configured automatically.

No complicated setup. No unnecessary configuration.

🌐 Native Paper & Velocity Support

Run the same FlexLogin.jar on both your Velocity proxy and Paper backend servers.

Features Login Once Across Your Entire Network Native Proxy Authentication Cryptographically Secure Authentication Cross-Server Sessions No Authentication Backend Server Shared Account Database Network-Wide 2FA Support 📦 Required Dependency LimboAPI (Velocity)

When running FlexLogin on Velocity, LimboAPI is required.

FlexLogin automatically creates a lightweight verification server directly inside your proxy.

Benefits:

No dedicated authentication server Automatic verification world Lightweight and fast Seamless player experience

Simply install LimboAPI alongside FlexLogin on your Velocity proxy.

💎 Native Premium Authentication

Forget FastLogin.

FlexLogin performs premium authentication using Mojang's official encrypted authentication handshake.

Features include:

Native Premium Authentication Automatic Premium Detection Instant Login Floodgate Support Intelligent Provider Fallback Smart Caching

Premium players skip passwords and join instantly.

🤖 Advanced AntiBot

FlexLogin protects your server using multiple layers of defense.

Protection Includes Physics-Based Verification Adaptive CAPTCHA Smart Rate Limiting Name Pattern Detection Automatic Attack Mode Memory-Safe Protection Intelligent Client Verification

Bots are stopped before they can reach your server.

🔐 Enterprise-Level Security Argon2id Password Hashing Server Pepper Protection Exact IP Binding Session Hijack Protection Device Trust Codes Two-Factor Authentication (TOTP) Shared-IP Protection Brute Force Protection Unicode Name Protection Maintenance Mode Password Log Filtering

Built with security as the highest priority.

🎨 Premium Player Experience

Authentication shouldn't look outdated.

FlexLogin includes:

🌌 Cinematic Void World 🎆 Login Fireworks 🎵 Sound Effects 🖥️ Beautiful GUIs 🔢 PIN Login 🔨 Anvil Login 📖 First Join Tutorial 🌟 Floating Platform 💚 Modern FlexLogin Branding ☁️ FlexLogin Cloud (Optional)

Extend FlexLogin with optional cloud services.

Features include:

Live Dashboard Login Analytics Attack Monitoring Encrypted Cloud Backups In-Game Updater

Privacy always comes first.

Passwords, hashes, and sensitive player information are never uploaded.

🗄️ Storage & Migration

Supported databases:

SQLite MySQL HikariCP Connection Pool

Migrate easily from:

AuthMe LoginSecurity

Passwords automatically upgrade to Argon2id after a successful login.

⚙️ Compatibility Feature Support Minecraft 1.18 – 1.21.x Platforms Paper • Spigot • Velocity Java 17+ Database SQLite • MySQL Required LimboAPI (Velocity) Optional Floodgate • FastLogin • ProtocolLib 🚀 Installation 📦 Proxy (Required)

Install FlexLogin on your Velocity proxy.

This is where player authentication takes place.

Also install LimboAPI, which FlexLogin uses to create the in-proxy verification and login server.

Velocity ├── FlexLogin.jar └── LimboAPI.jar 🖥️ Backend Servers (Recommended)

Install FlexLogin on every Paper/Spigot backend server.

Backend installations provide full account management across your entire network, including:

🎨 Civilian GUI 🛠️ Staff Management GUI 🔑 Password Manager 🔨 Anvil Login GUI 🔢 PIN Login GUI 📱 2FA Management 👤 Account Settings

All changes made from any backend server are automatically synchronized with the proxy, allowing players to securely manage their accounts from anywhere on your network.

Paper / Spigot └── FlexLogin.jar ✅ Done!

Start your proxy and backend servers.

FlexLogin will automatically:

Detect your environment Configure itself Connect your proxy and backend servers Enable network-wide authentication Synchronize account management Optimize security settings

No manual configuration required.