Yes. [API] PacketListenerAPI is free to download from SpigotMC.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

[API] PacketListenerAPI — Minecraft Core

About [API] PacketListenerAPI

From SpigotMC

Simple API to manipulate sent and received packets | compatible with all versions

This API provides an easy way to listen for when a Packet is sent or received and includes functions to modify Fields of the Packet.

Versions after 3.8 require Java 11+

Code (Text):

PacketListenerAPI.addPacketHandler(new PacketHandler() {

            @Override
            public void onSend(SentPacket packet) {
            }

            @Override
            public void onReceive(ReceivedPacket packet) {
            }

        });
 

The processed packets can also be limited by adding the @PacketOptions annotation.

If you are interested in manipulating packets directly on your BungeeCord server, check out the BungeeCord version of this API.

Examples

Checking a Packet

<button type="button" class="button bbCodeSpoilerButton ToggleTrigger Tooltip JsOnly" title="Click to reveal or hide spoiler" data-target="> .SpoilerTarget">Spoiler: Checking packet for Entity spawn</button>

1.) Not version save

Code (Java):

        PacketListenerAPI. addPacketHandler ( new PacketHandler ( ) {

            @Override
            public void onSend (SentPacket packet ) {
                if (packet. getPacket ( ) instanceof PacketPlayOutSpawnEntity ) { // instanceof requires an import of the Packet, therefore not Version save
                    // Currently spawning an entity.
                }
            }

            @Override
            public void onReceive (ReceivedPacket packet ) {
            }

        } ) ;
 

2.) version save (recommended)

Code (Java):

    PacketListenerAPI. addPacketHandler ( new PacketHandler ( ) {

            @Override
            public void onSend (SentPacket packet ) {
                if (packet. getPacketName ( ). equals ( "PacketPlayOutSpawnEntity" ) ) {
                    // Currently spawning an entity.
                }
            }

            @Override
            public void onReceive (ReceivedPacket packet ) {
            }

        } ) ;
 

<button type="button" class="button bbCodeSpoilerButton ToggleTrigger Tooltip JsOnly" title="Click to reveal or hide spoiler" data-target="> .SpoilerTarget">Spoiler: Old version</button>

1.) Not version save

Code (Text):

    @EventHandler
    public void onPacketSend(PacketSendEvent e) {
        if (e.getPacket() instanceof PacketPlayOutSpawnEntity) {// instanceof requires an import of the Packet, therefore not Version save
            // Currently spawning an entity.
        }
    }

2.) version save (recommended)

Code (Text):

@EventHandler
    public void onPacketSend(PacketSendEvent e) {
        if(e.getPacketName().equals("PacketPlayOutSpawnEntity")) {
            // Currently spawning an entity.
        }
    }
 

Modifying Field values

Read the full description on SpigotMC →

Highlights

From source data

Game versions

Supports 2 Minecraft versions, the newest being 1.17.

Loaders

Runs on Spigot and Paper.

Footprint

Rated a light load on a server.

[API] PacketListenerAPI on Nxeon

From our catalogue

One-click install: Supported on Nxeon Minecraft servers, for Paper servers. We download it from SpigotMC, place it, and restart the server.
Server side: Required on the server
Server type needed: Spigot, Paper
Server load: light
Smallest plan we suggest: Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
Latest build: 3.9.10-SNAPSHOT, released 2022-03-27

Game versions by loader

Loader	Game versions	Newest
Paper	1.16 to 1.17 (2 versions)	1.17
Spigot	1.16 to 1.17 (2 versions)	1.17

From 10 recorded builds of [API] PacketListenerAPI.

Recent builds

Build	Released	Game versions	Loaders
3.9.10-SNAPSHOT	2022-03-27	1.16 to 1.17 (2 versions)	Spigot, Paper
3.9.9-SNAPSHOT	2021-12-27	n/a	Spigot, Paper
3.9.8-SNAPSHOT	2021-08-15	n/a	Spigot, Paper
3.9.3-SNAPSHOT	2021-06-20	n/a	Spigot, Paper
3.9.2-SNAPSHOT	2021-06-07	n/a	Spigot, Paper
3.9.1-SNAPSHOT	2021-05-28	n/a	Spigot, Paper

Run [API] PacketListenerAPI on a Minecraft server

Pick a server or deploy a new one above; it is installed in one click.

What kind of mod it is

From the catalog

Listed on SpigotMC as “Core”

Libraries & compatibility

Foundations and fixes other mods build on. Usually installed because something else needs it.

Runs on your server

From source side support

SpigotMC lists [API] PacketListenerAPI as required on the server. Check its SpigotMC page to see whether players need it too.

Compatibility

Game: Minecraft
Loaders: SpigotPaper
Runs on: Serverrequired on the server
Game versions: 1.17 and 1 earlier
Requires: One-click install needs a Paper server.

Verified at the source

✓SpigotMCOfficial listing, checked 2026-10-01Open ↗
✓Authorinventivetalent, as published on SpigotMC
✓LicenseNot published by the sourceFree

[API] PacketListenerAPI