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OfflineAuthMinecraft mod

A lightweight authentication mod for Minecraft servers. Supports registration, login, inventory protection, brute-force prevention, and auto-login based on IP.

server only
Latest version
1.0.3
Minecraft
no version declared
Java
follows the game
Loaders
none declared
Licence
LGPL-3.0-only
Downloads
3.3k
Updated
11 mo ago
Available on
Modrinth
Space NodeOur hosting

Host OfflineAuth servers

One click and OfflineAuth is installed with the right loader, on hardware built for it.

  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Download

From OfflineAuth’s own host. Nothing is re-hosted here.

1.0.3release31 Oct 2025

offlineauth-1.0.3.jar · 23 KB · for 1.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more

Download latest
1ec3fb4f6ae8…
Older versions2
  • 1.0.26 Oct 20251.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more44 KB172 downloads969e999a89b7…Get
  • 1.08 Sept 20251.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +1 more22 KB68 downloads48210d0f9433…Get

Frequently asked

Do I need to install OfflineAuth on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

What licence is OfflineAuth under?

LGPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install OfflineAuth?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download OfflineAuth safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Which Minecraft versions does OfflineAuth work on?

The author has not declared a supported version in the metadata we sync, so there is nothing here we can state as fact. Check the project's own page before installing it, and treat an old mod with no declared version as untested on modern Minecraft.

Details from Modrinth, where the author last updated it on 31 Oct 2025. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Not indexed yet. Score 53 against a threshold of 55. The page still exists and is still linked; it simply carries noindex until we hold more.

Is this information wrong or missing something? .