
Modrinth · Minecraft mod
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 This library has been replaced by Matthiesen Core which provides a more robust and feature-rich foundation for mod developers to build upon.
Quick answer
Which Matthiesen Lib API release should I use?
Matthiesen Lib API 1.12.0 targets 1.21.1 with NeoForge. Do not install it on the client. It must be installed on the dedicated server. No extra mods listed for this file.
Where it goes
Is Matthiesen Lib API required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
This file is marked server-only.
What else does Matthiesen Lib API 1.12.0 need?
1.12.0. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Matthiesen Lib API without breaking your instance.
Built for Matthiesen Lib API 1.12.0. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.12.0. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.12.0. It opens that exact file at the source.
About this project
What does Matthiesen Lib API add?
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 This library has been replaced by Matthiesen Core which provides a more robust and feature-rich foundation for mod developers to build upon.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 yourmodsfolder 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.
Project description from Modrinth.
Pick your setup
Matthiesen Lib API by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Matthiesen Lib API versions and loaders
1.12.0
matthiesen-lib-api-neoforge-1.12.0.jar
18 Jul 2026
1.12.0
matthiesen-lib-api-fabric-1.12.0.jar
18 Jul 2026
1.11.3
matthiesen-lib-api-neoforge-1.11.3.jar
12 Jul 2026
1.11.3
matthiesen-lib-api-fabric-1.11.3.jar
12 Jul 2026
1.11.2
matthiesen-lib-api-fabric-1.11.2.jar
9 Jul 2026
1.11.2
matthiesen-lib-api-neoforge-1.11.2.jar
9 Jul 2026
1.11.1
matthiesen-lib-api-fabric-1.11.1.jar
8 Jul 2026
1.11.1
matthiesen-lib-api-neoforge-1.11.1.jar
8 Jul 2026
1.11.0
matthiesen-lib-api-neoforge-1.11.0.jar
5 Jul 2026
1.11.0
matthiesen-lib-api-fabric-1.11.0.jar
5 Jul 2026
1.10.4
matthiesen-lib-api-fabric-1.10.4.jar
4 Jul 2026
1.10.4
matthiesen-lib-api-neoforge-1.10.4.jar
4 Jul 2026
Looking for an older file? The official Modrinth project page is in Resources.