Bridgekeeper Protocol Plugin protects your server from sudden authentication outages by keeping player connections open when session servers drop. It checks authentication status on a repeating timer and switches to a cached security mode when needed. Returning players can still join safely as long as their connection details match their previous session. It also keeps original player UUIDs consistent so inventories and saved player data remain completely intact.

Bridgekeeper Protocol Plugin

Features:

  • Saves player authentication records locally in FlatFile storage or a MySQL database.
  • Keeps original premium player UUIDs intact without converting profiles.
  • Blocks login attempts from unfamiliar IP addresses during session outages.
  • Denies brand-new unknown accounts from joining until main authentication returns.
  • Runs across Bukkit, Spigot, Paper, and BungeeCord setups without external libraries.
  • Operates quietly in the background with low resource usage.

Commands:

  • /alwaysonline toggle: switches manually between offline mode and standard mode.
  • /alwaysonline enable: turns on automated authentication checks.
  • /alwaysonline disable: stops automated authentication checks.
  • /alwaysonline reload: reloads the configuration file.

Permissions:

  • alwaysonline.usage: grants access to run all plugin commands.
  • alwaysonline.notify: sends chat alerts when authentication status changes.

How to Install:

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Bridgekeeper Protocol Plugin Download Links

For Minecraft 1.21.11, 1.21.10, 1.21.9

2 MB Aug 29, 2026
Download from Server 1 — Download from Server 2

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