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Justify API

Justify API

MOD
Shared API and runtime library for Justify Lasers and Justify Portal Gun: rendering, networking, physics and simulation.
by MrAskick
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1,758 downloads
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Updated Oct 14, 2026
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API and Library
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JustifyAPI

Shared API and runtime for Justify Lasers and Justify Portal Gun.

JustifyAPI provides the common systems used across Justify mods, including rendering, networking, physics, simulation, and shared runtime logic. Individual addons register their own content and provide their own models, textures, sounds, and other assets.

The goal of JustifyAPI is to keep shared functionality in one place instead of duplicating the same systems across multiple mods.

Features

  • Shared rendering systems
  • Networking and packet handling
  • Physics and simulation utilities
  • Common runtime systems
  • Shared APIs for Justify mods
  • Reusable client and server-side functionality
  • Addon registration support
  • Centralized infrastructure for future Justify projects

For Players

JustifyAPI is a library mod and is not intended to be used on its own.

Install it when another Justify mod lists it as a required dependency.

Currently used by:

For Developers

JustifyAPI acts as the common foundation for the Justify mod ecosystem. Addons can use its shared systems while keeping their actual content and assets inside their own projects.

This makes individual mods smaller, easier to maintain, and allows improvements to shared systems to be reused across multiple projects.

JustifyAPI-1.20.1-2.0.0-beta.130-universal.jar
MC Client, Fabric, 1.20.1, Forge, NeoForge, Server
Beta 2026-10-15 Get
JustifyAPI-1.21.1-2.0.0-beta.130-universal.jar
MC Client, Fabric, Forge, 1.21.1, NeoForge, Server
Beta 2026-10-15 Get
JustifyAPI-26.2-2.0.0-beta.130-universal.jar
MC Client, Fabric, NeoForge, Server, 26.2
Beta 2026-10-15 Get
JustifyAPI-1.21.1-2.0.0-beta.95-universal.jar
MC Client, Fabric, Forge, 1.21.1, NeoForge, Server
Beta 2026-10-05 Get
JustifyAPI-1.20.1-2.0.0-beta.95-universal.jar
MC Client, Fabric, 1.20.1, Forge, NeoForge, Server
Beta 2026-10-05 Get
JustifyAPI-1.20.1-2.0.0-beta.79-universal.jar
MC Client, Fabric, 1.20.1, Forge, NeoForge, Server
Beta 2026-09-30 Get
JustifyAPI-1.21.1-2.0.0-beta.79-universal.jar
MC Client, Fabric, Forge, 1.21.1, NeoForge, Server
Beta 2026-09-30 Get
JustifyAPI-1.21.1-2.0.0-beta.66-universal.jar
MC Client, Fabric, Forge, 1.21.1, NeoForge, Server
Beta 2026-09-27 Get
JustifyAPI-1.20.1-2.0.0-beta.66-universal.jar
MC Client, Fabric, 1.20.1, Forge, NeoForge, Server
Beta 2026-09-27 Get
JustifyAPI-1.20.1-2.0.0-beta.59-universal.jar
MC Client, Fabric, 1.20.1, Forge, NeoForge, Server
Beta 2026-09-26 Get
JustifyAPI-1.21.1-2.0.0-beta.59-universal.jar
MC Client, Fabric, Forge, 1.21.1, NeoForge, Server
Beta 2026-09-26 Get

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