How do I install OpenAuthMod?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on Modrinth — not every file is mirrored on our own servers.

What Minecraft version does OpenAuthMod work with?

The listing gives Minecraft 1.8, 1.8.1, 1.8.2, among others. This is the version stated by the author or source site, not something we verified ourselves.

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OpenAuthMod

by RaphiMC · on Modrinth

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader Fabric2 builds
Mod loader Forge2 builds
Mod loader Quilt1 build

Minecraft version

Minecraft 1.19–1.19.4Newest
Minecraft 1.14–1.18.2

Minecraft 1.19–1.19.4Newest
Minecraft 1.11–1.12.2

Minecraft 1.19–1.19.4Newest

⬇ Download for 1.19–1.19.4 · Fabric ⬇ Download for 1.14–1.18.2 · Fabric ⬇ Download for 1.19–1.19.4 · Forge ⬇ Download for 1.11–1.12.2 · Forge ⬇ Download for 1.19–1.19.4 · Quilt

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

OpenAuthMod

Open source minecraft authentication protocol for proxies

Modrinth releases will always have only the latest version uploaded. Older versions can be found on the projects GitHub.

What does this mod

This mod provides an easy and secure interface for proxies to authenticate to an online mode server. This works by forwarding the authentication request to the client and letting it do the authentication.

When using this mod, your session or private keys WILL NOT be sent to the server at any point. Everything is done clientside and with your confirmation.

Compatibility

Fabric 1.14 - 1.19.3
Forge 1.14 - 1.19.3
Forge 1.8 - 1.12.2

Projects where this mod can be used

ViaProxy: ViaProxy lets players join on every classic, alpha, beta and release server. To try it out join viaproxy.raphimc.net with a minecraft 1.8 - latest client. OpenAuthMod allows you to join online mode servers over that proxy.
VIAaaS: VIAaaS is a standalone ViaVersion proxy.

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.8, 1.8.1, 1.8.2
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

Verified by MCModsHub

Ships as OpenAuthMod-Forge-1.8-1.12.2-2.1.3.jar — drop this file into the mods folder
Download size: 165 KB
Download link checked 31 Aug 2026 — working

These come from our own check of the pack file, not from the source page.

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