Yes. AAC - AntiAutoClicker 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.

AAC - AntiAutoClicker — Minecraft Admin

From SpigotMC

Prevent players from surpassing a click limit!

AAC
AntiAutoClicker

Features :

Installation :

Download the Plugin
Move the .jar into your plugins folder
Reload or restart your server
Go into the configuration file and make sure you play around a bit, you can change the max CPS players can reach before the commands will get executed.
Reload or restart the server for your changes in your configuration file to take effect.

Permissions :

ac.bypass - Allows these users to bypass the amount of clicks per second specified

If you have any special requests, feedback, or bugs to report please PM them and I will get to you as soon as possible, thank you!

From source data

Supports 2 Minecraft versions, the newest being 1.13.

Runs on Spigot and Paper.

Rated a light load on a server.

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: 2.0, released 2019-01-11

Loader	Game versions	Newest
Paper	1.8 to 1.13 (2 versions)	1.13
Spigot	1.8 to 1.13 (2 versions)	1.13

From 3 recorded builds of AAC - AntiAutoClicker.

Build	Released	Game versions	Loaders
2.0	2019-01-11	1.8 to 1.13 (2 versions)	Spigot, Paper
1.1	2016-04-11	n/a	Spigot, Paper
1.0	2016-04-11	n/a	Spigot, Paper

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

From the catalog

Listed on SpigotMC as “Admin”

Permissions, moderation, anti-cheat and land protection for the people running the server.

From source side support

SpigotMC lists AAC - AntiAutoClicker as required on the server. Check its SpigotMC page to see whether players need it too.