Mineuniverse
Mods
OPAC-UI

OPAC-UI

MOD
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.
by ImEden6
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404,294 downloads
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Updated Oct 14, 2026
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Addons Utility & QoL
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opac-ui

A client-side mod that adds an in-game party management GUI for Open Parties and Claims using Cloth Config's tabbed-list UI.

Requirements

  • Minecraft 1.20.1 (Fabric)
  • Fabric API
  • Forge Config API Port (Fabric only - required by Open Parties and Claims' Fabric build)
  • Open Parties and Claims (≥ 1.20.1)
  • Cloth Config API (≥ 11.x)

Usage

Press P (configurable in key bindings) to open the party manager.

  • Not in a party - Create Party button
  • In a party - Tabbed screen with three tabs:
    • Members - view ranked member list; promote/demote, kick, and transfer ownership (permission-dependent)
    • Invite - invite players by name; revoke pending invites
    • Allies - view allied parties; unally (permission-dependent)

Branches

This mod is maintained as one branch per Minecraft version - see each branch's own README and CHANGELOG on GitHub for loader-specific setup notes.

opac-ui always requires Open Parties and Claims

  • it's a client-side add-on, not a standalone mod. Exact versions per branch:
Branch Minecraft Loader(s) Open Parties and Claims Cloth Config API Fabric API Forge Config API Port
1.20.1/main 1.20.1 Fabric ≥ 1.20.1 ≥ 11.x 0.92.11+1.20.1 Fabric only
1.21.1/main 1.21.1 Fabric, Forge, NeoForge ≥ 1.21.1 ≥ 15.x 0.105.0+1.21.1 (Fabric) Fabric and Forge (not needed on NeoForge)
26.1.2/main 26.1.2 Fabric, Forge, NeoForge ≥ 26.1.2 not used 0.145.4+26.1.2 (Fabric) Fabric and Forge (not needed on NeoForge)
26.2/main 26.2 Fabric, Forge, NeoForge ≥ 26.2 not used 0.159.0+26.2 (Fabric) Fabric and Forge (not needed on NeoForge)
26.3/main 26.3 Fabric, Forge, NeoForge ≥ 26.3 not used 0.162.0+26.3 (Fabric) Fabric and Forge (not needed on NeoForge)

Notes:

  • Cloth Config was dropped starting with the 26.1.2/main branch since it no longer ships a Forge build - the party screen there is built entirely with Minecraft's own UI components instead.
  • 26.1.2/main, 26.2/main and 26.3/main also need Java 25 (bundled with the game; only relevant when building from source).

License

LGPL-3.0-only - see LICENSE. Matches the Open Parties and Claims project.

OPAC-UI 1.0.0 (NeoForge 26.3)
MC Client, NeoForge, 26.3
Release 2026-10-07 Get
OPAC-UI 1.0.0 (Forge 26.3)
MC Client, Forge, 26.3
Release 2026-10-07 Get
OPAC-UI 1.0.0 (Fabric 26.3)
MC Client, Fabric, 26.3
Release 2026-10-07 Get
opacui-fabric-1.20.1-1.0.4.jar
MC Client, Fabric, 1.20.1
Release 2026-09-29 Get
opacui-forge-1.20.1-1.0.4.jar
MC Client, 1.20.1, Forge
Release 2026-09-29 Get
opacui-fabric-1.21.1-1.0.3.jar
MC Client, Fabric, 1.21.1
Release 2026-09-29 Get
opacui-forge-1.21.1-1.0.3.jar
MC Client, Forge, 1.21.1
Release 2026-09-29 Get
opacui-neoforge-1.21.1-1.0.3.jar
MC Client, 1.21.1, NeoForge
Release 2026-09-29 Get
opacui-fabric-26.1.2-1.0.5.jar
MC Client, Fabric, 26.1.2
Release 2026-09-29 Get
opacui-forge-26.1.2-1.0.5.jar
MC Client, Forge, 26.1.2
Release 2026-09-29 Get
opacui-neoforge-26.1.2-1.0.5.jar
MC Client, NeoForge, 26.1.2
Release 2026-09-29 Get
opacui-fabric-26.2-1.0.1.jar
MC Client, Fabric, 26.2
Release 2026-09-29 Get
opacui-forge-26.2-1.0.1.jar
MC Client, Forge, 26.2
Release 2026-09-29 Get
opacui-neoforge-26.2-1.0.1.jar
MC Client, NeoForge, 26.2
Release 2026-09-29 Get
opacui-fabric-1.20.1-1.0.3.jar
MC Client, Fabric, 1.20.1
Release 2026-09-18 Get
opacui-neoforge-26.2-1.0.0.jar
MC Client, NeoForge, 26.2
Release 2026-09-04 Get
opacui-fabric-26.2-1.0.0.jar
MC Client, Fabric, 26.2
Release 2026-09-04 Get
opacui-forge-26.2-1.0.0.jar
MC Client, Forge, 26.2
Release 2026-09-04 Get
opacui-fabric-1.20.1-1.0.2.jar
MC Client, Fabric, 1.20.1
Release 2026-08-13 Get
opacui-forge-1.20.1-1.0.2.jar
MC Client, 1.20.1, Forge
Release 2026-08-13 Get
opacui-fabric-1.21.1-1.0.1.jar
MC Client, Fabric, 1.21.1
Release 2026-08-13 Get
opacui-forge-1.21.1-1.0.1.jar
MC Client, Forge, 1.21.1
Release 2026-08-13 Get
opacui-fabric-26.1.2-1.0.2.jar
MC Client, Fabric, 26.1.2
Release 2026-08-13 Get
opacui-forge-26.1.2-1.0.2.jar
MC Client, Forge, 26.1.2
Release 2026-08-13 Get
opacui-neoforge-26.1.2-1.0.2.jar
MC Client, NeoForge, 26.1.2
Release 2026-08-13 Get
opacui-neoforge-26.1.2-1.0.0.jar
MC Client, NeoForge, 26.1.2
Release 2026-08-06 Get
opacui-fabric-26.1.2-1.0.0.jar
MC Client, Fabric, 26.1.2
Release 2026-08-06 Get
opacui-forge-26.1.2-1.0.0.jar
MC Client, Forge, 26.1.2
Release 2026-08-06 Get
opacui-forge-26.1.2-1.0.1.jar
MC Client, Forge, 26.1.2
Release 2026-08-06 Get
opacui-neoforge-26.1.2-1.0.1.jar
MC Client, NeoForge, 26.1.2
Release 2026-08-06 Get
opacui-fabric-26.1.2-1.0.1.jar
MC Client, Fabric, 26.1.2
Release 2026-08-06 Get
opacui-fabric-1.21.1-1.0.0.jar
MC Client, Fabric, 1.21.1
Release 2026-08-05 Get
opacui-forge-1.21.1-1.0.0.jar
MC Client, Forge, 1.21.1
Release 2026-08-05 Get
opacui-neoforge-1.21.1-1.0.0.jar
MC Client, 1.21.1, NeoForge
Release 2026-08-05 Get
opacui-fabric-1.20.1-1.0.1.jar
MC Client, Fabric, 1.20.1
Release 2026-08-03 Get
opacui-forge-1.20.1-1.0.1.jar
MC Client, 1.20.1, Forge
Release 2026-08-03 Get
opacui-fabric-1.20.1-1.0.0.jar
MC Client, Fabric, 1.20.1
Release 2026-07-31 Get
opacui-forge-1.20.1-1.0.0.jar
MC Client, 1.20.1, Forge
Release 2026-07-31 Get

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