ModsFinder

Legacy Fabric API

by LegacyFabric

Legacy Fabric API is a library that supplies hooks and compatibility code for mods built on the Legacy Fabric toolchain.

Legacy FabricOrnitheClient or server, optionalApache License 2.0Open source1.3 – 1.12.2

What it does

Mods built for older Minecraft releases use this library to reach common hooks without each mod shipping its own copy. It runs on the Legacy Fabric loader and on Ornithe, and it needs Ornithe Standard Libraries to start. Either side can run it, and neither needs it. Builds cover 1.3 – 1.12.2, with snapshot builds published, and the code is open source under the Apache License 2.0.

Key features

  1. Shared hooks

    Provides the common hooks that toolchain mods call, so those mods can share one implementation.

  2. Toolchain compatibility

    Carries compatibility code that lets mods built on the Legacy Fabric toolchain work together.

  3. Source and issue tracker

    The source code and issue tracker are publicly linked, so bug reports and changes can be followed in one place.

Compatibility

Latest build for each game version and loader.

1.12.x3 of 3 versions with builds
1.12.21.13.51.21.0
1.12.1Not available1.21.0
1.12Not available1.21.0
1.11.x3 of 3 versions with builds
1.11.21.13.51.21.0
1.11.1Not available1.21.0
1.11Not available1.21.0
1.10.x3 of 3 versions with builds
1.10.21.13.51.21.0
1.10.1Not available1.21.0
1.10Not available1.21.0
1.9.x5 of 5 versions with builds
1.9.41.13.51.21.0
1.9.3Not available1.21.0
1.9.2Not available1.21.0
1.9.1Not available1.21.0
1.9Not available1.21.0
1.8.x10 of 10 versions with builds
1.7.x9 of 9 versions with builds
1.6.x3 of 3 versions with builds
1.5.x2 of 2 versions with builds
1.4.x5 of 5 versions with builds
1.3.x2 of 2 versions with builds
ReleaseBetaAlphaNot available

This mod also publishes snapshot builds. Snapshots are not shown in the matrix.

Requirements

Dependencies declared by the latest file for each loader.

Required 1

Ornithe Standard LibrariesA set of libraries for modding with Ornithe.
Required

Required by 18 mods

AxolotlClient - Customizable HUD & Client QoL Features1.8.9 – 26.2NoExpensive1.7.10 – 26.3One Key Miner1.7.10 – 26.3Brigo1.12 – 1.12.2MineConf1.7.10 – 26.3LAN Properties1.12 – 1.21.8

Questions

Does Legacy Fabric API need Ornithe Standard Libraries?

Yes. Ornithe Standard Libraries is a required dependency and must be installed alongside it.

Do servers need Legacy Fabric API?

No. Installing it on one side is enough, and many mods that depend on it are installed on both sides.

Which game versions does Legacy Fabric API support?

Builds exist for 1.3 – 1.12.2, and the latest Legacy Fabric file targets 1.12.2.

In the catalog

Legacy Fabric API is one of 3,514 Library mods on ModsFinder. 2,920 mods support Minecraft 1.12.2.

Library mods3,514Mods for 1.12.22,920

More from LegacyFabric

All projects
LFLegacy Fabric API fixes for BTW1.6.4Legacy (Fabric) Fixes1.3.2 – 1.8.9

Similar mods

MaLiLib1.12 – 26.3AzureLibb1.7.3 – 26.3OneConfig1.8.9 – 26.3Enchantment Level Language Patch1.12.2 – 26.3Ornithe Standard Librariesa1.0.4 – 1.14.4MineConf1.7.10 – 26.3

What the author says

Legacy Fabric API is the core library for the most common hooks and inter compatibility measures utilized by mods using the Legacy Fabric toolchain. This is SEPARATE from the Fabric loader! You need both for most mods!
LegacyFabric, on the Modrinth page

Official listing

Owner
LegacyFabric
Published
2022-11-28
Updated on Modrinth
2026-10-08
Facts verified
2026-10-15

Tags

Library
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