ModsFinder

LegacyAuth

by Moyettes

LegacyAuth restores player authentication on Minecraft Beta servers that still run in online mode, so names are verified and spoofing is blocked.

OrnitheClient or server, optionalMIT Licenseb1.0 – b1.7.3

What it does

Beta servers that once checked accounts against the online service stopped working as expected for later builds, and LegacyAuth brings that verification back for the older releases. A legacy server such as b1.2_02 can once again confirm that the joining player owns the name they use, which closes the gap that allowed name spoofing.

The mod also brings back player skins for the Beta versions, so players see their proper skins in-game as they did originally. Restoring skins takes only a client install, and servers can join without any change to their file list. Because the mod is a lightweight addition, it adds little overhead to a world or a server.

Files are published for Ornithe only, across 11 release versions b1.0 – b1.7.3, and the mod is licensed under the MIT License. It is not open source. Snapshot builds are published as well, and the issue tracker is public for bug reports.

Key features

  1. Account verification on legacy servers

    Verifies joining players against their online accounts on Beta servers that run in online mode, blocking name spoofing.

  2. Beta skin restoration

    Brings back proper player skins in the Beta versions, so each player appears with their own skin again.

  3. Normal server joins

    Players join supported servers as usual, with no extra steps and no changes to the server's mods folder.

  4. Lightweight design

    The mod is small and does not change world generation or gameplay systems beyond authentication and skins.

No per-version build data
Modrinth lists game versions for this project (b1.0 – b1.7.3), but the source data has no build per game version and loader, so the compatibility grid is not shown.

Use cases

Running a Beta server in online mode

Server owners who want verified accounts on a legacy build can keep online-mode checks working for their players.

Playing with correct skins

Players who want to see their own skins on Beta versions can add the client mod to restore them.

Who it’s for: The mod suits players of the Beta releases and the owners of legacy servers who want accounts verified. Players who only join a server and do not run one need the client side for skins alone.

Questions

Does LegacyAuth have to be installed on the server?

No. The mod works on either side, and neither needs it. Installing it on the client alone is enough to restore skins.

Which loader does LegacyAuth use?

It is published for Ornithe only. Files cover 11 release versions, b1.0 – b1.7.3, and snapshot builds are published too.

Can a server verify players with LegacyAuth?

Yes. On a legacy server such as b1.2_02 running in online mode, the mod restores account verification that blocks name spoofing.

In the catalog

LegacyAuth is one of 8,016 Management mods on ModsFinder. 567 mods support Minecraft b1.7.3.

Management mods8,016Mods for b1.7.3567

More from Moyettes

All projects
LegacyVoiceChatb1.0 – 1.8.1

Similar mods

MineGITb1.5 – 26.3RetroConvertb1.7.3

What the author says

Lightweight mod that restores secure player authentication to legacy servers (e.g., b1.2\_02) where online-mode no longer works verifies identities and blocks name spoofing. Additionally, LegacyAuth restores player skins to Beta versions of Minecraft — allowing players to see proper skins once again. Skins…
Moyettes, on the Modrinth page

Official listing

Owner
Moyettes
Published
2025-08-22
Updated on Modrinth
2025-10-15
Facts verified
2026-10-15

Tags

ManagementUtility
Open on ModrinthCompare