ModsFinder

Packet Auth

by NikSne

Packet Auth gives a Minecraft server an authentication layer that checks players with a token sent through custom plugin messages.

FabricQuiltClient and serverAll rights reserved1.18 – 1.21.5

What it does

Packet Auth lets server owners set up an authorization system for their server. A token travels in a custom plugin message to confirm each player, adding a check on top of the standard login. Fabric API is required, and Mod Menu is optional. Client and server: both the server and every player need the mod. Files cover 1.18 – 1.21.5 for Fabric and Quilt, and the latest is 1.6.4 for 1.21.5.

Key features

  1. Server authorization

    An authorization system for servers checks players before they can play.

  2. Token-based authentication

    Players are verified with a token carried by a custom plugin message, not by a plain login check.

  3. Configurable options

    Server owners can adjust the authentication settings through the mod's configuration options.

Compatibility

Latest build for each game version and loader.

1.21.x6 of 6 versions with builds
1.21.51.6.41.6.4
1.21.41.6.41.6.4
1.21.31.6.41.6.4
1.21.21.6.41.6.4
1.21.11.6.41.6.4
1.211.6.41.6.4
1.20.x7 of 7 versions with builds
1.20.61.6.41.6.4
1.20.51.6.41.6.4
1.20.41.6.41.6.4
1.20.31.6.41.6.4
1.20.21.6.41.6.4
1.20.11.6.41.6.4
1.201.6.41.6.4
1.19.x5 of 5 versions with builds
1.18.x3 of 3 versions with builds
ReleaseBetaAlphaNot available

Only full game releases are shown. This mod publishes no snapshot builds.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Fabric APILightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.
Required

Optional 1

Mod MenuAdds a mod menu to view the list of mods you have installed.
Optional

How it compares

Full comparison

Potato Auth is client-side only, open source under the MIT License and published for Fabric across 1.20 – 1.21.5, so it runs on players' clients alone. Nedologin is client and server, under a custom license, and covers 1.19.2 – 1.21.11 for Fabric, Forge, NeoForge and Quilt. Packet Auth is not open source and is released under All rights reserved.

ModLoadersGame versionsEnvironmentUpdated
Packet AuthFabric and Quilt1.18 – 1.21.5Client and server2025-05-15
Potato AuthFabric1.20 – 1.21.5Client-side only2025-11-27
NedologinFabric, Forge, NeoForge and Quilt1.19.2 – 1.21.11Client and server2026-07-12

Questions

Does Packet Auth need Fabric API?

Yes. Fabric API is required, and Mod Menu is an optional dependency.

Does Packet Auth have to run on both sides?

Yes. Servers that run it need every player to install it too.

In the catalog

Packet Auth is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 15,307 mods support Minecraft 1.21.5.

Technology mods8,499Fabric modsMods for 1.21.515,307

More from NikSne

All projects
Vanilla RPC1.14 – 26.2Splashed!1.18 – 1.21.5

Similar mods

Create Fabric1.18.2 – 1.20.1Create Big Cannons1.18.2 – 1.21.1GD656Killicon1.18.2 – 1.21.4Fabric Seasons: Extras1.19.2 – 1.21.1Ad Astra1.18.2 – 1.21.1Create: New Age1.19.2 – 1.21.1

What the author says

Packet Auth is a project that provides additional security for your server by authenticating players with a token sent via a custom plugin message. Enjoy your secure server with Packet Auth!
NikSne, on the Modrinth page

Official listing

Owner
NikSne
Published
2023-06-21
Updated on Modrinth
2025-05-15
Facts verified
2026-10-15

Tags

TechnologyUtilityGame mechanicsManagement
Open on ModrinthCompare