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OPAC-UIMinecraft mod for 26.3

This project adds a client-side companion for Open Parties and Claims that turns its command-only party management into a full in-game GUI for members, invites, and allies.

newest supported release 26.3Utility QolMc Addons
Latest version
OPAC-UI 1.1.0 (NeoForge 1.21.1)
Minecraft
1.20.1 to 26.3
Java
Java 25+
Loaders
NeoForge, Forge, Fabric
Licence
not stated
Downloads
528.6k
Updated
9 d ago
Available on
CurseForge

Minecraft versions

Every version OPAC-UI declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
26.3NeoForge, Forge, Fabric25+declared15 Sept 2026
26.2Forge, Fabric, NeoForge25+declared16 Jun 2026
26.1.2NeoForge, Fabric, Forge25+declared9 Apr 2026
1.21.11Fabric, Forge, NeoForge21+declared9 Dec 2025
1.21.1NeoForge, Forge, Fabric21+declared8 Aug 2024
1.20.1Forge, Fabric, NeoForge17+declared12 Jun 2023

Download

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

Browse 75 indexed releases

For Minecraft 26.3

Choose the loader you use before downloading.

  • NeoForge

    OPAC-UI 1.1.0 (NeoForge 26.3) · 29 Oct 2026 · opacui-neoforge-26.3-1.1.0.jar

    Get NeoForge

  • Fabric

    OPAC-UI 1.1.0 (Fabric 26.3) · 29 Oct 2026 · opacui-fabric-26.3-1.1.0.jar

    Get Fabric

  • Forge

    OPAC-UI 1.1.0 (Forge 26.3) · 29 Oct 2026 · opacui-forge-26.3-1.1.0.jar

    Get Forge

Most recently published release

OPAC-UI 1.1.0 (NeoForge 1.21.1)release29 Oct 2026

opacui-neoforge-1.21.1-1.1.0.jar · 80 KB · for 1.21.1 · NeoForge

Download this release
8adb4b97891d…
Older versions24
  • OPAC-UI 1.1.0 (Fabric 1.21.1)29 Oct 20261.21.180 KB57f7e25ca629…Get
  • OPAC-UI 1.1.0 (Forge 1.21.1)29 Oct 20261.21.180 KBe744bd8349e0…Get
  • OPAC-UI 1.1.0 (Fabric 1.21.11)29 Oct 20261.21.1177 KBf2b6e191939f…Get
  • OPAC-UI 1.1.0 (Forge 1.21.11)29 Oct 20261.21.1176 KB44cd14d960fe…Get
  • OPAC-UI 1.1.0 (NeoForge 1.21.11)29 Oct 20261.21.1177 KB64de182a385d…Get
  • OPAC-UI 1.1.0 (NeoForge 26.3)29 Oct 202626.377 KB7d7588d01736…Get
  • OPAC-UI 1.1.0 (Fabric 26.3)29 Oct 202626.377 KB9151a53483fe…Get
  • OPAC-UI 1.1.0 (Forge 26.3)29 Oct 202626.376 KBd59cb5a6111c…Get
  • OPAC-UI 1.1.0 (NeoForge 26.1.2)29 Oct 202626.1.277 KBff772a436497…Get
  • OPAC-UI 1.1.0 (Forge 26.1.2)29 Oct 202626.1.276 KB90571df63a2a…Get
  • OPAC-UI 1.1.0 (Fabric 26.1.2)29 Oct 202626.1.276 KBaaa629528b59…Get
  • OPAC-UI 1.1.0 (Fabric 1.20.1)29 Oct 20261.20.180 KB11a47ab83b25…Get
  • OPAC-UI 1.1.0 (Forge 1.20.1)29 Oct 20261.20.181 KB943b71eb311b…Get
  • OPAC-UI 1.1.0 (Fabric 26.2)29 Oct 202626.277 KB5d07d5a101a5…Get
  • OPAC-UI 1.1.0 (NeoForge 26.2)29 Oct 202626.277 KBcb89455343b2…Get
  • OPAC-UI 1.1.0 (Forge 26.2)29 Oct 202626.276 KB6ce99e194243…Get
  • OPAC-UI 1.0.5 (Forge 1.21.1)29 Oct 20261.21.168 KB8ef5735284dc…Get
  • OPAC-UI 1.0.5 (NeoForge 1.21.1)29 Oct 20261.21.168 KBdd6d9a28694f…Get
  • OPAC-UI 1.0.5 (Fabric 1.21.1)29 Oct 20261.21.168 KBeb15116ea5f6…Get
  • OPAC-UI 1.0.2 (Fabric 26.2)29 Oct 202626.265 KBb7c5837b2212…Get
  • OPAC-UI 1.0.2 (Forge 26.2)29 Oct 202626.264 KB5e680d63adff…Get
  • OPAC-UI 1.0.2 (NeoForge 26.2)29 Oct 202626.265 KB83883e8b9709…Get
  • OPAC-UI 1.0.1 (Forge 26.3)29 Oct 202626.364 KB5be9f45e692a…Get
  • OPAC-UI 1.0.1 (Fabric 26.3)29 Oct 202626.365 KBd234a7bc2607…Get

Frequently asked

Does OPAC-UI work on Minecraft 26.3?

Yes. 26.3 is the newest Minecraft version OPAC-UI declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does OPAC-UI support?

Everything the author has declared, from 1.20.1 up to 26.3. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does OPAC-UI support?

NeoForge, Forge, Fabric. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for OPAC-UI?

Among the supported Minecraft releases above, the highest recorded requirement is Java 25 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

How do I install OPAC-UI?

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 OPAC-UI safely?

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

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

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Details from CurseForge, where the author last updated it on 29 Oct 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .