
Saros Mod Checker
A server-side mod that enforces fair gameplay by verifying client mods and resource packs on join, instantly blocking players with blacklisted or…
⬇ Download on Modrinth
The Saros Mod Checker is a server-side mod that verifies client mods and resource packs when players join your server. It checks all installed mods and active resource packs against a configurable blacklist, automatically disconnecting players who have forbidden content installed.

Mod Verification 🔍
- Automatically scans all client mods when players join the server.
Resource Pack Checking 📦
- Validates active resource packs alongside mods for complete content verification.
SHA-256 Hash Verification 🔐
- Uses secure SHA-256 hashing to identify mods and resource packs by their exact content.
Configurable Blacklist ⚙️
- Easy-to-edit JSON configuration file to manage blacklisted mod names and hashes.
Automatic Mod List Export 📋
- Exports the server's mod list to
modlist.mdon server startup.
- Exports the server's mod list to
Instant Kick Protection 🛡️
- Players with blacklisted mods or resource packs are immediately disconnected with a clear message.

- Server Setup: Install the mod on your server - it will automatically create a default blacklist config.
- Client Requirement: Players must have Saros Mod Checker installed to join the server.
- Blacklist Configuration: Edit
config/sarosmodchecker-blacklist.jsonto add mod names or SHA-256 hashes. - Verification Process: When a player joins, their mods and resource packs are automatically verified.

/checkclientmods <player>: View all mods and resource packs installed on a connected player's client. (OP Level 2 required)

Currently Supported
- Forge 1.20.1 ✅
Join our community on Discord to give feedback and suggestions or report any bugs you find!
Project Support & Usage
Hosting: For the best performance, I recommend using BisectHosting linked in the banner.
Modpacks: You are free to include my work in any modpack. Please ensure proper credit is given by providing a link to this project page.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as sarosmodchecker-1.0.0.jar — drop this file into the mods folder
- Download size: 27 KB
- Download link checked 11 Sept 2026 — working
These come from our own check of the pack file, not from the source page.
