
Modrinth · Minecraft mod
Authentication
Authentication of Minecraft players in web applications
Quick answer
Which Authentication release matches 1.2.1?
Authentication 0.5.0-fabric targets 1.0, 1.1, 1.2.1 with Fabric. The project page does not say whether this file belongs on the client, dedicated server, or both. No extra mods listed for this file.
Where it goes
Is Authentication required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Authentication 0.5.0-fabric need?
0.5.0-fabric on 1.2.1. Every mod below is checked against that same setup.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Authentication without breaking your instance.
Built for Authentication 0.5.0-fabric on 1.2.1. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 0.5.0-fabric. It targets 1.0, 1.1, 1.2.1 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside 0.5.0-fabric. It opens that exact file at the source.
About this project
What does Authentication add?
Authentication
This plugin allows the authentication of Minecraft players in web applications via Nginx auth_request. It is a single puzzle piece in this ecosystem to secure and lock down your Minecraft server related websites such as maps or analytics pages. You can use this plugin as a standalone and let the web application do the access control but only a few of such applications exists so you will probably want the next piece
for Authorization
Due to the need of external software and multiple ports. You will most likely not be able to use this on any Minecraft hosting services and need to have a proper server such as a cloud vps or a dedicated server.
Keep in mind that authentication is an advanced topic and you are expected to have basic understanding of Nginx and networks to be able to succesfully use this plugin.
See the GitHub repository readme for more details and installation instructions.
Project description from Modrinth.
Pick your setup
Authentication by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
1 loader build26.1.1
1 loader build26.1
2 loader builds1.21.11
2 loader builds1.21.10
2 loader builds1.21.9
2 loader builds1.21.8
2 loader builds1.21.7
2 loader builds1.21.6
2 loader builds1.21.5
2 loader builds1.21.4
2 loader buildsShowing the newest 12 of 102 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Authentication versions and loaders
0.5.0-fabric
Authentication-Fabric-0.5.0.jar
29 Mar 2026
Looking for an older file? The official Modrinth project page is in Resources.