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SimpleCore API Mod for Minecraft 1.20.1, 1.12.2

API used by SimpleOres and other plugins.

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Updated
Updated 31.10.2026

About the SimpleCore API mod

This is a library mod for SimpleOres2 and all the SimpleOres2 add-ons still currently being maintained. The only items or blocks in this mod are test objects.

Required for Simple Ores2 and all add-ons for Minecraft/Forge 1.16.3 and later.

Not required (or available) for Simple Ores2 and all add-ons for Minecraft/Forge 1.14.4 to 1.16.1.

Required for Simple Ores2 and all add-ons for Minecraft/Forge 1.12.2 and earlier.

Please see http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1279863-simpleores-2-by-alexndrthegr8st for information.

For 1.10.2/1.11.2 versions, McJty's CompatLayer 0.2.5 or later is REQUIRED.

Alexndrthegr8st's original work (All Simple Ores/Simple Core code up and including SimpleCore 1.2.0 for Minecraft 1.8) is licensed as per the Forum thread above (requires simple attribution). Sinhika's later, derived work, with Alexndrthegr8st's permission, is now licensed under LGPL 3.0. Go wild, modpack makers!

How to install SimpleCore API

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 1.12.2–1.20.6 on Forge or NeoForge automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Install Forge or NeoForge

    The loader must match the game version of the mod file, for example Minecraft 1.20.6. After installing it, a separate profile appears in your launcher.

  2. Download the file for your version

    In the version list above, pick the file SimpleCoreLib-1.20.6-7.0.5.3.jar (231 KB) for your game version and loader.

  3. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.

  4. Launch the loader profile

    Open “Mods” in the main menu: SimpleCore API should be in the list.

Minecraft 1.20.6 runs on Java 21: with a different Java version the game may close right after launch.

Versions

With dependencies

MinecraftLoaderFileDateActions
1.20.6NeoForgeSimpleCoreLib-1.20.6-7.0.5.3.jar231 KB
1.20.6NeoForgeSimpleCoreLib-1.20.6-7.0.3.5.jar172 KB
1.20.1NeoForge, ForgeSimpleCoreLib-1.20.1-6.0.1.2.jar172 KB 1
1.20.1NeoForge, ForgeSimpleCoreLib-1.20.1-6.0.1.1.jar171 KB
1.20.1NeoForge, ForgeSimpleCoreLib-1.20.1-6.0.1.0.jar171 KB
1.12.2—simplecore-1.12.2-1.7.3.4.jar131 KB

FAQ

Which Minecraft versions does SimpleCore API work on?

There are files for 1.20.6, 1.20.1, 1.12.2. The newest is 1.20.6.

Is SimpleCore API for Forge or Fabric?

There are files for Forge: 1.20.1 and for NeoForge: 1.20.1–1.20.6. There are no files for Fabric: a mod for another loader will not start.

Does SimpleCore API need other mods?

The author lists no required dependencies: the Forge or NeoForge loader is enough.

Which Java does SimpleCore API need?

Minecraft 1.20.6 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.

Where can I download SimpleCore API safely?

On this page: the file SimpleCoreLib-1.20.6-7.0.5.3.jar (231 KB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: c71ab56330d708b1e6e3cbacbe061ebe778faf55.

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