Make sure you download and run the companion service from the github page(Mineify) as well as the mod jar

Mineify - Server-Wide Music Player for Minecraft

A Minecraft Fabric mod that enables server-wide music playback where players can search YouTube, add songs to a shared playlist, and listen together.

Usage

Join a server with Mineify installed
Make sure companion service is running and connected
Press N+M to open the Mineify GUI
Search for a song using the search bar
Click a result to add it to the playlist
Songs play automatically for all connected players

Architecture Overview

Mineify consists of two main components:

┌─────────────────────────────────────────────────────────────────────┐
│                         MINECRAFT SERVER                            │
│  ┌─────────────────┐    ┌──────────────────┐                        │
│  │  Mineify Mod    │◄──►│  Playlist Manager │                       │
│  │  (Server-side)  │    │  (Track Queue)    │                       │
│  └────────┬────────┘    └──────────────────┘                        │
│           │                                                         │
│           │ Network Packets (playlist sync, play audio URL)         │
│           ▼                                                         │
│  ┌─────────────────┐    ┌──────────────────┐                        │
│  │  Mineify Mod    │───►│  AudioPlayer     │                        │
│  │  (Client-side)  │    │  (WAV via HTTP)  │                        │
│  └─────────────────┘    └──────────────────┘                        │
└─────────────────────────────────────────────────────────────────────┘
                              │
                              │ HTTP API
                              ▼
┌─────────────────────────────────────────────────────────────────────┐
│                     MINEIFY COMPANION SERVICE                       │
│  ┌─────────────────┐    ┌──────────────────┐    ┌────────────────┐  │
│  │  Express Server │◄──►│ youtube-search-  │    │    yt-dlp      │  │
│  │  (REST API)     │    │ api (npm)        │    │  (Downloader)  │  │
│  └─────────────────┘    └──────────────────┘    └────────────────┘  │
└─────────────────────────────────────────────────────────────────────┘

How It Works

Fabric Mod (Java): Handles Minecraft integration - GUI, keybindings, networking, and audio playback
Companion Service (Node.js): Handles YouTube search and download using free tools:
- youtube-search-api: Scrapes YouTube search results without requiring an API key
- yt-dlp: Downloads and converts YouTube audio to WAV format (free, open-source)
Audio Playback: When a song is added to the playlist, the server asks the companion service to download it, then sends the download URL to all clients. Each client fetches the WAV file over HTTP and plays it locally using javax.sound.sampled.

Features

N Keybinding: Open the Mineify GUI from anywhere in-game
YouTube Search: Search for songs directly in Minecraft
Shared Playlist: All players see and contribute to the same queue
Automatic Playback: Songs play automatically when added and advance through the queue
Late-Join Support: Players who join mid-song receive the current track
Session Storage: Downloads are cached per server session

Requirements

For the Companion Service

Node.js 18+
yt-dlp (installed on system PATH)
ffmpeg (installed on system PATH, used by yt-dlp for audio conversion)

Installation

Prerequisites

Both server and client require:

Minecraft 1.21.11
Fabric Loader 0.18.x+
Fabric API

The server (or whoever hosts the companion service) also needs:

Node.js 18+
yt-dlp installed and on your system PATH
ffmpeg installed and on your system PATH

Client Setup

Install Fabric Loader for Minecraft 1.21.11 if you haven't already.
Download the Fabric API mod and place it in your .minecraft/mods/ folder.
Build the mod (or obtain the JAR):
```
cd fabric-mod
./gradlew build
```
Copy fabric-mod/build/libs/mineify-1.0.0.jar into your .minecraft/mods/ folder.
Launch Minecraft using the Fabric profile. No additional client configuration is needed — the mod connects to the server automatically.

Note: Clients must be able to reach the companion service URL over HTTP to download audio. If the companion service is not on the same machine as the Minecraft server, ensure clients can access it (e.g. by port-forwarding or using a public IP).

Server Setup

Install Fabric Loader on your server for Minecraft 1.21.11.
Place both the Fabric API JAR and the Mineify JAR (mineify-1.0.0.jar) into the server's mods/ folder.
Start the companion service:
```
cd companion-service
npm install
npm start
```
This runs on http://localhost:3001 by default.
Create config/mineify.json in your server directory:
```
{
  "companionServiceUrl": "http://localhost:3001",
  "maxPlaylistSize": 50,
  "audioSessionFolder": "./mineify-sessions"
}
```
If the companion service runs on a different machine, update companionServiceUrl accordingly.
Start the Minecraft server. The mod will connect to the companion service on startup.

Note: The companion service must be running before players try to search or add songs. The Minecraft server and companion service can run on the same machine or on separate machines — just make sure the URL is reachable from both the server and all clients.

Development

Building the Mod

Requires Java 21. If your default Java version differs, set JAVA_HOME:

export JAVA_HOME=/path/to/jdk-21

cd fabric-mod
./gradlew build          # Build the mod
./gradlew runClient      # Run test client
./gradlew runServer      # Run test server

Running the Companion Service in Dev Mode

cd companion-service
npm run dev              # Runs with nodemon for hot reload

Legal Notes

This mod is for personal/educational use. Users are responsible for ensuring they comply with YouTube's Terms of Service and applicable copyright laws. The developers do not endorse or encourage piracy.

License

MIT License - See LICENSE file for details.

Mine-ify

📖About Mine-ify