Z-Auth | Modern Minecraft Authentication Plugin (Velocity & BungeeCord)

Z-Auth — Free Minecraft Authentication Plugin for Velocity & BungeeCord

A lightweight, proxy-first authentication plugin for offline-mode Minecraft networks, with backend protection, session login, and optional 2FA.

What's Included

• Velocity and BungeeCord authentication support
• Spigot, Paper, Purpur, and Folia backend guard modules
• /login and /register commands
• Session login (skip re-auth on IP-based reconnect)
• Authenticator app 2FA support
• SQLite, MySQL, MariaDB, and PostgreSQL database options
• Admin commands for account management
• Backend join protection so unauthenticated players can't touch survival worlds

Why Use This

Offline-mode networks need proxy-level auth to stop players from joining backend servers unauthenticated. Z-Auth handles that at the Velocity/BungeeCord layer instead of per-server plugins that can be bypassed.

Compatibility

Velocity or BungeeCord proxy required. Backend guard supports Spigot, Paper, Purpur, and Folia.

Install

Full setup and database configuration steps are in the included README.

This plugin is free.

Frequently Asked Questions

Is this plugin really free?

Yes — no cost, full source and setup docs included.

Do I need this on every backend server?

The backend guard module goes on each Spigot/Paper/Purpur/Folia server; the core auth logic runs once on your Velocity or BungeeCord proxy.

Which databases are supported?

SQLite, MySQL, MariaDB, and PostgreSQL.