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How to Add Mods to Your Minecraft Server

Choosing Your Modding Platform​

Modding is one of the biggest reasons people run dedicated Minecraft servers. Whether you want quality-of-life plugins, performance optimizations, or total game overhauls, the first step is choosing the right server software. Each platform has a distinct purpose and ecosystem.

Paper: Plugins for Server Management​

Paper is the go-to choice for plugin-based servers. Built on the Bukkit and Spigot plugin API, Paper adds hundreds of performance patches and supports thousands of existing plugins. Use Paper when you want server-side additions like economy systems, minigames, anti-cheat, permissions management, and world protection without changing the client-side game.

Players connect with a standard vanilla Minecraft client. No client-side mods required.

Fabric: Lightweight Mods​

Fabric is a modern mod loader focused on speed and simplicity. It updates quickly when new Minecraft versions release and has minimal overhead. Nearly all major optimization mods -- Lithium, Sodium, Starlight, FerriteCore -- are Fabric-exclusive or Fabric-first. Fabric is ideal when you want modded gameplay with the best possible performance.

Players need to install Fabric and the same mods on their client to connect.

Forge: The Classic Mod Loader​

Forge has been the dominant mod loader since 2011 and hosts the largest library of Minecraft mods. Complex modpacks like those on CurseForge and Modrinth are predominantly built on Forge. It takes longer to update to new Minecraft versions, but no other platform matches its mod catalog depth.

NeoForge: The Modern Successor​

NeoForge forked from Forge and has received stronger community support on newer Minecraft versions since 2023. Most Forge mods are compatible with NeoForge, and an increasing number of mod authors target NeoForge exclusively for recent Minecraft releases. If you are starting a new modded server on Minecraft 1.20.4 or newer, NeoForge is typically the better Forge-family choice.

Installing Plugins on Paper​

Step 1: Set Up Paper​

Download the latest Paper build for your Minecraft version from papermc.io. Replace your existing server JAR with the Paper JAR and start the server once to generate configuration files.

Step 2: Find Plugins​

Browse plugins on these platforms:

  • Hangar -- Paper's official plugin repository
  • SpigotMC -- The largest Bukkit/Spigot plugin marketplace
  • Modrinth -- Growing platform with plugins and mods

Download the plugin JAR files for your server's Minecraft version.

Step 3: Install​

Place the downloaded JAR files into your server's plugins/ directory. Restart the server. Most plugins generate their own configuration files inside plugins/pluginname/ on first launch.

Step 4: Configure​

Edit the generated configuration files with a text editor. Each plugin has its own settings. After making changes, either restart the server or use the plugin's reload command if it supports one.

Essential Paper Plugins​

  • LuckPerms: The standard permissions management plugin. Controls what each player and group can do.
  • WorldGuard + WorldEdit: Region protection and building tools. Essential for preventing griefing.
  • EssentialsX: Core utility commands including /home, /warp, /tpa, and /spawn.
  • Spark: Performance profiler for identifying lag sources.
  • Chunky: Pre-generates chunks to eliminate exploration lag.
  • CoreProtect: Block logging and rollback. Find out who broke what and undo it.

Installing Mods on Fabric​

Step 1: Set Up the Fabric Server​

Download the Fabric server launcher from fabricmc.net. Run the installer, select your Minecraft version, and it will generate the server files.

Step 2: Install Fabric API​

Almost every Fabric mod requires Fabric API as a dependency. Download it from Modrinth or CurseForge and place it in the mods/ directory.

Step 3: Add Mods​

Download Fabric-compatible mods and place them in the mods/ directory. Verify that each mod supports your specific Minecraft version. Incompatible versions will cause crashes on startup.

Step 4: Client Setup​

Every player must install the Fabric loader and the same mods on their client. Server-side-only mods exist but most gameplay mods require both sides.

Essential Fabric Server Mods​

  • Lithium: The most impactful server-side optimization mod. Fixes core inefficiencies in game logic without changing vanilla behavior.
  • FerriteCore: Reduces memory usage across multiple systems.
  • C2ME: Parallelizes chunk generation across multiple CPU cores.
  • Spark: Performance profiler (available for Fabric too).
  • Carpet: Technical Minecraft mod with dozens of configurable tweaks and optimizations.

Installing Mods on Forge or NeoForge​

Step 1: Set Up the Server​

For Forge, download the installer from files.minecraftforge.net. For NeoForge, visit neoforged.net. Run the installer and select "Install server." Point it to your server directory.

Step 2: Add Mods​

Place mod JAR files into the mods/ directory. Ensure each mod matches your exact Minecraft version and mod loader (Forge vs NeoForge).

Step 3: Resolve Dependencies​

Forge and NeoForge mods often have dependencies on library mods. Check each mod's page for required dependencies and install those as well. Missing dependencies cause startup crashes with specific error messages telling you what is missing.

Step 4: Client Setup​

Players must install the matching Forge or NeoForge loader and the same mods on their client. Modpack launchers like CurseForge, Modrinth, or ATLauncher simplify this process by packaging everything together.

Tips for Managing a Modded Server​

Keep Mods Updated​

Outdated mods are the most common source of crashes and security vulnerabilities. Check for updates regularly, especially after Minecraft version upgrades.

Test Before Deploying​

Always test new mods or configuration changes on a local copy before applying them to your live server. A single incompatible mod can prevent the server from starting.

Monitor Performance​

Install Spark on every server regardless of mod loader. Run /spark profiler regularly to identify which mods are consuming the most resources. Remove or replace poorly performing mods.

Back Up Frequently​

Modded servers are more prone to world corruption than vanilla servers. Automated daily backups are essential. Keep at least a week of backup history so you can roll back to a stable state.

Document Your Mod List​

Maintain a list of every mod, its version, and its download source. This makes troubleshooting easier and helps players set up their clients to match.

Reactor Hosting

Reactor's Minecraft hosting supports vanilla, Paper, Fabric, Forge, and NeoForge servers. Upload mods and plugins through SFTP, manage your server through the web console, and rely on automatic backups to keep your world safe.