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Compat API

Universal compat api that auto-loads integrations, data packs and loot modifiers for mods that depend on it.

FabricNeoForgeForge
Loaders
FabricNeoForgeForge
Downloads on Modrinth
31.5K
Followers on Modrinth
4
versions
8
Updated
March 20, 2026Mar 20
Published
in 2025
This is a library — other mods need it, and it adds nothing to the game by itselfRequired by 1 mods. Download it if another mod needs it.

At a glance

A library: other mods need it — required by 1 mods
Runs on Fabric, NeoForge and Forge
For Minecraft 1.20.1, 1.21.1
Needed in the game and on the server
Latest version — 1.0.3 from March 20, 2026
License MIT — free
Where it's needed
In gamerequiredOn serverrequired

Needed both in the game and on the server

Game versions1.20.1, 1.21.1

📖 About

Compat API is a lightweight and universal compatibility framework for the entire “Compat” ecosystem by fixerlink — including Compat Delight, the upcoming Compat Artifacts, Compat Decor, and any third-party mod that wants an easy, automated way to add cross-mod integrations.

Instead of hardcoding compat logic or manually managing data packs, Compat API handles everything for you: auto-loading compat code, injecting data packs, wrapping loot modifiers, applying conditions, and enabling integrations only when the required mods are installed.


📃 Features

  • Smart Compat Scanner: Loads integrations only from mods that explicitly depend on Compat API.
  • Automatic Compat Code Loading: Detects compat modules in `net...compats.` and runs their register, init, or bootstrap hooks automatically.
  • Automatic Data Pack Injection: Loads content from `data///compats/` as built-in data packs — only when the target mod exists.
  • Universal Loot Modifier System: Adds compat conditions automatically and generates the global loot modifier list.
  • Compatibility Conditions: Built-in condition compatapi:compat_enabled ensures integrations load safely and only when appropriate.
  • Per-Target Config Toggles: Every compat module can be enabled or disabled individually via config.
  • Safe & Clean System: Compat errors never crash the game — they’re logged and gracefully skipped.

📝 Description

How it works:

You install Compat API. That’s it.

If a mod depends on Compat API and includes compat modules, the API will:

  • detect its compat code
  • inject its compat data packs
  • wrap its loot modifiers
  • apply conditions
  • and enable integrations automatically

If the target mod is missing — the compat simply won’t load. No errors, no crashes, no manual setup needed. Mods can freely add compat folders and classes — Compat API does all the heavy lifting. And of course, every integration can be toggled via config.


🎁 Bonus Info

  • Mods that do not depend on Compat API are fully ignored
  • All integrations load only when their target mods are present
  • Errors in compat code never break the game
  • Fully automated system: code, data packs, conditions, loot modifiers
  • Supports thousands of integrations with minimal boilerplate

🧾 Credits

Compat API is developed by fixerlink as a universal standard for all Compat-series mods and for developers who want clean, modular, and automated cross-mod integrations.


Feedback is welcome!

FAQ

How to install Compat API?

Install Fabric for your Minecraft version, download Compat API for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does Compat API support?

Compat API has builds for Minecraft 1.20.1, 1.21.1.

Is Compat API needed on the server?

Needed in the game and on the server

License and source
MIT Licensefree to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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