Mods Type Checker

ModsChecker

CLI tool to audit Minecraft mods and flag client-only mods. It scans a mods folder, calculates hashes, and queries Modrinth and CurseForge to classify mods.

Гайд на русском: тут

Features

• Modrinth lookup by SHA1.
• CurseForge lookup by fingerprint (batch request).
• Metadata detection from fabric.mod.json, META-INF/mods.toml, mcmod.info.
• Client-only classification + heuristics.
• Console summary and optional JSON report.
• English/Russian output.

Requirements

• Runtime: Java 8 to 25.
• Build: JDK 17+ (Gradle 8.x requirement).

Build

./gradlew build

Resulting fat-jar:

build/libs/modschecker-1.0.0.jar

Run

java -jar modschecker-1.0.0.jar

Example output

Configuration file

On first run, a modschecker.properties file is created next to the jar (or in the working directory).

Example:

modsDir=./mods
curseforgeApiKey=
gameId=432
verbose=false
jsonOutput=
language=ru
pauseOnExit=true

CLI options

• --modsDir <path>: Mods folder (default ./mods next to the jar or cwd).
• --curseforgeApiKey <key>: API key (or env CURSEFORGE_API_KEY).
• --gameId <int>: Default 432 (Minecraft).
• --jsonOutput <path>: Save JSON report.
• --verbose: Print extra diagnostics.
• --language <lang>: ru or en.
• --pause: Wait for Enter before exit (default on Windows).
• --noPause: Do not wait for Enter.

Classification rules

A mod is considered client-only if:

• Modrinth client_side=required and server_side=unsupported (client required), or
• Modrinth client_side=required and server_side=optional (client preferred).

If Modrinth data is not available, a heuristic is used based on keywords in mod names.

Notes

• CurseForge is used for identification only (no explicit client/server flags).
• No infinite retries or loops; HTTP timeouts are used.