
Flint API Loader (1.21.5, 1.20.1) – An Open-Source Modloader
Java mod listed for Minecraft 1.20–1.21. Download on the author's site.
⬇ DownloadFlint API Loader is a tiny, open-source modloader system, aimed at players playing on Vanilla and Plugin Servers, like Spigot/Paper etc. This is NOT a replacement for Fabric, Quilt, NeoForge or Forge, and will not allow you to run mods made for any of them. Flint has it’s own API for mods. Flint is a hobby/learning project, and is not intended to replace any other modloader out there, and will not allow you to run a server.

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Flint API Loader Download Links
For All Versions from Minecraft 1.14.4 to Minecraft 1.21.5, 1.21.4, 1.21.1, 1.20.1
Installer: Download from Server 1 – Download from Server 2
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.5, 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 the file's original source — 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.
Flint API Loader (1.21.5, 1.20.1) – An Open-Source Modloader is a free Minecraft Java mod. Compatible with Minecraft 1.21.5, 1.20.1. Download it and open it directly in the game.