About Matthiesen Lib API
From Modrinth⚠️ This mod has been deprecated and is no longer going to receive updates. This library has been replaced by Matthiesen Core which provides a more robust and feature-rich foundation for mod developers to build upon.
Matthiesen Lib API
> ⚠️ This mod has been deprecated and is no longer going to receive updates. This library has been replaced by Matthiesen Core which provides a more robust and feature-rich foundation for mod developers to build upon.
Matthiesen Lib API is the server-side API for Matthiesen Lib, a lightweight Architectury-style library that enables mod developers to write shared code that works seamlessly across both Fabric and NeoForge mod loaders for Minecraft 1.21.1. Instead of maintaining separate implementations for each platform, you can write your mod logic once in common code and let Matthiesen Lib handle the platform-specific details.
> Note: For regular users, This library does nothing on its own - it's a developer tool. If a mod requires Matthiesen Lib API, > simply drop it in your mods folder alongside the mod that needs it.
Docs
Documentation for the library can be found at mods.matthiesen.dev
Version Compatibility
| Minecraft Version | Library Version | |-------------------|-----------------| | 1.21.1 | 1.x.x |
FastStats Metrics
This library uses FastStats to collect anonymous usage statistics. This helps the developer understand how the library and the mods built using the library are being used and improve it over time. You can learn more about the data collected and how it is used by visiting FastStats: Information.
You can also view the data collected by this library on the FastStats: Matthiesen Lib API page.
To opt out of this data collection, set the enabled property to false in the <game_directory>/config/matthiesen_lib_api/metrics.properties file.
Highlights
From source dataGame versions
Built for Minecraft 1.21.1.
Loaders
Runs on Fabric and NeoForge.
Footprint
Rated a light load on a server.
What kind of mod it is
From the catalogLibraries & compatibility
Foundations and fixes other mods build on. Usually installed because something else needs it.
Runs on your server
From source side supportModrinth lists Matthiesen Lib API as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- FabricNeoForge
- Runs on
- Serverrequired on the server
- Game versions
- 1.21.1
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-01Open ↗
- ✓AuthorAdammatthiesen, as published on Modrinth
- ✓LicenseMITFree









