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CheckYourMods

Security tool for NeoForge 1.21.1. Smart Xray resource pack detection via metadata. Client mod verification against server whitelist.

NeoForge
Loaders
NeoForge
Downloads on Modrinth
1.6K
Followers on Modrinth
3
version
1
Updated
January 10, 2026Jan 10
Published
in 2026
img 1 — visual of the warnigs · swipe

At a glance

Runs on NeoForge
For Minecraft 1.21.1
Needed in the game and on the server
Latest version — 1.0.0 from January 10, 2026
License MIT — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.21.1

CheckYourMods 🛡️

CheckYourMods is an advanced security and transparency tool for Minecraft 1.21.1 (NeoForge) designed for server administrators. Specifically designed for friends' servers to ensure that no one is downloading suspicious mods that aren't necessary to play or cheating. It ensures a fair play environment by monitoring client-side modifications and resource packs.

✨ Key Features

  • Smart Mod Verification: Automatically compares player mods against the server's mod list and ignores matches.
  • Intelligent Resource Pack Scan: Detects suspicious keywords like "xray", "vision", or "transparent" within the pack's internal metadata (pack.mcmeta).
  • SHA-256 Fingerprinting: Allows manual tracking of specific resource packs using their unique digital hash.
  • Transparency for Players: Includes public commands so players can verify what is being monitored, ensuring the staff is not hiding anything.
  • Persistent Logging: All connection data, detected mods, and suspicious packs are recorded in logs/checkyourmods-log.txt.

🛠️ Configuration

The mod generates a configuration file in serverconfig/checkyourmods-server.toml with intuitive instructions:

  1. allowed_mod_ids: Add IDs for client-side utility mods (e.g., optifine, sodium, voicechat) so they are not announced as extra mods.
  2. manual_xray_hashes: Add specific SHA-256 hashes for malicious packs that might bypass the keyword scanner.

💻 Commands

  • /modcheck list: Shows the list of allowed mod IDs to all players.
  • /modcheck packs: Shows the list of manually watched resource pack hashes.

📄 License

Distributed under the MIT License. This allows for high transparency and community collaboration. See the LICENSE file for more information.


Created for the Minecraft Server Administration community.

FAQ

How to install CheckYourMods?

Install NeoForge for your Minecraft version, download CheckYourMods for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does CheckYourMods support?

CheckYourMods has builds for Minecraft 1.21.1.

Is CheckYourMods needed on the server?

Needed in the game and on the server

License and source
MIT Licensefree to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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