AutoJoinParty

AutoJoinParty is a lightweight client-side Fabric mod for competitive PvP players. It automatically joins public parties and introduces real-time group coordination so your whole squad enters the same party at once.

Features

Instant Auto-Join — Automatically detects public party invitations in chat (e.g. (1/32) Player is hosting a public party!) and executes the join command immediately.

Friends & Group System — Add friends, see which server they are on in real-time, and create groups. When the group leader joins a party, all group members are pulled in automatically.

Leader / Member Logic — Group leaders have Auto Join enabled automatically. Members have it disabled by default and only get pulled in when the leader joins — preventing accidental party joins without the leader.

Toggle System — Press 6 at any time to enable or disable Auto Join. A confirmation message appears in chat.

Friends GUI — Press N to open the Friends & Group overlay with two tabs:

• Friends — See who is online, invite them to a group, or remove them.
• Requests — Accept or decline incoming friend requests; view sent requests.

No commands required — everything can be done by clicking in the GUI.

Supported Versions

| Version | Notes |
|———|——-|
| 1.21.1 – 1.21.4 | Stable |
| 1.21.5 – 1.21.8 | Group auto-disable logic added |
| 1.21.9 – 1.21.11 | Last obfuscated era — main tested version |
| 26.1 / 26.1.1 / 26.1.2 | First deobfuscated versions |
| 26.2 | Chaos Cubed update |

This mod has been mainly tested on 1.21.11. Other versions may contain bugs or compatibility issues.

Installation

1. Install Fabric Loader for your Minecraft version.
2. Install Fabric API.
3. Download the correct JAR for your version from this page.
4. Place the JAR in your .minecraft/mods folder (or Lunar Client mods folder).
5. Launch Minecraft.

Controls

| Action | Default Keybind |
|——–|—————–|
| Open Friends GUI | N |
| Toggle Auto Join | 6 |

Both keybinds can be changed in Options → Controls → AutoJoinParty.

Everything can be done by clicking in the Friends GUI. For players who prefer
typing, the following client-side commands are also available:

• /ajp accept <player> — Accept a group invite from a player
• /ajp decline <player> — Decline a group invite from a player
• /ajp invite <player> — Invite a player to your group
• /ajp kick <player> — Kick a player from your group
• /ajp leave <player> — Dissolve your group (if you are the leader) or leave the group.

These commands have no effect on your perfomance

This is a client-side only mod — no server plugin required.