OPAC-UI

Mod

by ImEden6

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.

Type

Mod

CurseForge Downloads

558,161

CurseForge ID

1633264

Modrinth Downloads

158,404

Modrinth ID

PriJM6Wm

Last Updated

Nov 6, 2026

Description

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).