Matthiesen Lib API

Matthiesen Lib API

The Server-side API for Matthiesen Lib, providing utilities and features for mod developers using the library

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fabricneoforgelibraryutility
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About this Mod

Matthiesen Lib API

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

Available Versions

Matthiesen Lib API 1.7.1 - Fabricrelease
MC 1.21.1fabric
June 15, 2026
Matthiesen Lib API 1.7.1 - NeoForgerelease
MC 1.21.1neoforge
June 15, 2026
Matthiesen Lib API 1.7.0 - NeoForgerelease
MC 1.21.1neoforge
June 15, 2026
Matthiesen Lib API 1.7.0 - Fabricrelease
MC 1.21.1fabric
June 15, 2026
Matthiesen Lib API 1.6.2 - NeoForgerelease
MC 1.21.1neoforge
June 13, 2026

How to Install Matthiesen Lib API on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Matthiesen Lib API". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabricneoforge

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Matthiesen Lib API server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Matthiesen Lib API compatible with fabric and neoforge?

Matthiesen Lib API officially supports fabric, neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Matthiesen Lib API – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Matthiesen Lib API consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Matthiesen Lib API with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
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NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.21.1