ProtocolLib allows developers to intercept, read, and modify Minecraft packets effortlessly, without changing the server code. This powerful tool enhances plugin functionality by giving deeper access to the game's communication system, enabling custom features, advanced gameplay mechanics, and more control over interactions between the server and connected players.
ProtocolLib is a powerful library used in Minecraft server development, allowing plugin developers to intercept, modify, and manage the network packets exchanged between the client and server. Instead of dealing directly with Minecraft’s complex and version-specific internal code (NMS), ProtocolLib provides a cleaner and more stable API. This makes it easier to create advanced plugin features without constantly updating for each new Minecraft version.
Originally created to simplify packet handling, ProtocolLib has become essential for many popular plugins, especially those involving custom visuals, anti-cheat systems, or complex interactions like fake blocks and invisible entities. It works seamlessly with Spigot, Paper, and other Bukkit-based server software, making it highly versatile for both hobbyist and professional developers. Whether you're trying to control player actions or display unique in-game effects, ProtocolLib gives you the tools to deeply customize Minecraft’s behavior.
Key Features
ProtocolLib allows developers to easily manipulate Minecraft protocol packets, providing advanced control over network communication for custom features, mods, and server optimizations.
Packet Interception
Intercepts incoming and outgoing packets, allowing developers to modify or cancel data between the client and server without touching core Minecraft code.
Version Independence
Handles changes between Minecraft versions internally, so plugins using ProtocolLib require fewer updates and stay compatible longer.
Custom Packet Creation
Allows creation and sending of custom packets to players, enabling unique features like fake block updates, visual effects, or custom GUI systems.
Plugin Compatibility
Designed to work seamlessly alongside other plugins, reducing conflicts and making it easier to add advanced features to any server setup.
Entity Manipulation
Modify how entities appear to players hide them, change names, or display custom visuals—without changing the actual game state.
Anti-Cheat Support
Helps in building or enhancing anti-cheat systems by tracking suspicious packet patterns or blocking specific player actions in real-time.
Installation Guide
The Installation Guide for ProtocolLib helps server owners and developers set up the library to intercept and modify Minecraft network packets for custom functionality.
- Download ProtocolLib: Go to the Spigot ProtocolLib page and download the latest .jar file.
- Install: Move the .jar file to your server's /plugins folder.
- Restart Server: Restart your server to load the plugin.
- Verify Installation: Use /plugins to check if ProtocolLib is listed.
- Add Dependency:
pom.xml:
<dependency>
<groupId>com.comphenix.protocol</groupId>
<artifactId>ProtocolLib</artifactId>
<version>5.2.0</version>
<scope>provided</scope>
</dependency>
compileOnly 'com.comphenix.protocol:ProtocolLib:5.2.0'
- Set Up Development Environment: Use Spigot/Paper API and Java 8+.
- Start Coding: Implement ProtocolLib's API to interact with Minecraft packets.
Useful Links
Get direct access to ProtocolLib’s documentation, source code, plugin downloads, and support forums to simplify development and resolve issues faster.
ProtocolLib By The Numbers
Frequently Asked Questions
ProtocolLib is to provide quick answers to common queries, helping users understand and troubleshoot the plugin efficiently.
What is ProtocolLib?
ProtocolLib is a Minecraft library that allows plugins to intercept, modify, or cancel network packets between the client and server.
What can I do with ProtocolLib?
You can modify chat messages, create fake entities, block certain actions, build custom GUIs, monitor traffic, and more.
Which Minecraft server types support ProtocolLib?
ProtocolLib works with Bukkit, Spigot, Paper, and other forks of the Bukkit API.
Is ProtocolLib a plugin or a library?
It’s both. Server owners install it as a plugin, while developers use it as a library in their plugins.
Is ProtocolLib safe to use on a production server?
Yes, it's widely used on many large servers, but like any plugin, it should be tested first.
How do I install ProtocolLib on my server?
Download the .jar file from Spigot or GitHub and place it in your /plugins folder. Restart the server.
How do I add ProtocolLib to my plugin project?
Use Maven or Gradle to include it as a dependency. Mark it as provided so it isn’t bundled in your final jar.
What version of ProtocolLib should I use?
Use the version that matches your Minecraft server version. Always check the Spigot resource page for compatibility.
Does ProtocolLib work with the latest Minecraft versions?
Yes, ProtocolLib is updated regularly to support the latest releases.
Can I use ProtocolLib without writing Java code?
No. You need to write a plugin in Java to use ProtocolLib’s API.
How do I listen to a specific packet?
Use PacketAdapter and specify the packet type (e.g., PacketType.Play.Client.CHAT).
Can I block or cancel a packet?
Yes, use event.setCancelled(true) in your packet listener.
How do I modify packet contents?
You can read or write to packet fields using ProtocolLib’s wrapper methods like getStrings(), getIntegers(), etc.
What are packet types in ProtocolLib?
Packet types are categories like Play, Login, Status, and Handshake, each with Client and Server directions.
How do I send custom packets to a player?
Create a packet, fill in its data, then send it with ProtocolManager.sendServerPacket(player, packet).
Can I use ProtocolLib to create a fake block?
Yes. Send a block change packet to a player without modifying the world.
Can I create a fake entity or player?
Yes. Send entity spawn packets with custom data.
Is ProtocolLib good for anti-cheat plugins?
Absolutely. You can monitor packet behavior to detect cheats or illegal actions.
Can I change chat messages before they’re sent?
Yes, by intercepting the chat packet and modifying the message string.
Can I hide players or entities from others?
Yes, by canceling certain packets like ENTITY_SPAWN for specific players.