ModChecker

ModChecker

A Mod which checks if a Player has an unallowed Mod installed

by
3.0K Downloads
fabricutility
Rent Server with this Mod

About this Mod

ModChecker

Static Badge
Modrinth Downloads

forthebadge

buymeacoffee


Please join the Discord if you have questions!

This Mod is just checks if your installed Mods check with the allowed List on Github.

Features



This mod doesnt share which mods you are using, with the Server owner, just that their are unexpected ones found.



The Mod fetches a json file, from the repo, which contains a list of the allowed Mods.
If there is no mod found which is disallowed it will change the Client name which the server Owner can see if he wants to.

Normal Client Name: ModChecker-fabric v1.2 (No unexpected mods detected)
Unexpected Mods found: ModChecker-fabric v1.2 (unexpected mods detected)

Add further Mods to the list

If you want me too add more Mods to the allowed List open a Issue in the Repo or open a Pull request with the changes


I know that this mod is easy to circumvent but its just a little something cause i dont trust my friends.

Available Versions

ModChecker 1.4.1release
MC 1.21.10fabric
November 2, 2025
ModChecker 1.4.1 for 1.21.9release
MC 1.21.9fabric
October 2, 2025
ModChecker 1.4.1 for 1.21.8release
MC 1.21.8fabric
August 8, 2025
ModChecker 1.4.1 for 1.21.7release
MC 1.21.7fabric
August 8, 2025
ModChecker 1.4.1 for 1.21.6release
MC 1.21.6fabric
August 8, 2025

How to Install ModChecker on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.10).

3

Install Mod

Open the mod browser in the dashboard and search for "ModChecker". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.10, 1.21.9, 1.21.8 (+15 more)

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

ModChecker server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.10). You can switch loaders with one click in the panel.

Is ModChecker compatible with fabric?

ModChecker officially supports fabric for Minecraft 1.21.10, 1.21.9, 1.21.8. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with ModChecker – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if ModChecker consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install ModChecker with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Unsupported

Supported Versions

1.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.31.21.21.21.1+8 more