
Modrinth · Minecraft mod
Legacy Fabric API
The legacy fabric version of the fabric api.
Quick answer
Which Legacy Fabric API release matches 1.8.4?
Legacy Fabric API 1.19.0 targets 1.3, 1.3.1, 1.3.2 with ornithe. Installation on the client is optional. Installation on the dedicated server is optional. All 1 required mods have matching files.
Where it goes
Is Legacy Fabric API required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Legacy Fabric API 1.19.0 need?
1.19.0 on 1.8.4. Every mod below is checked against that same setup.
Install Ornithe Standard Libraries first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Legacy Fabric API without breaking your instance.
Built for Legacy Fabric API 1.19.0 on 1.8.4. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.19.0. It targets 1.3, 1.3.1, 1.3.2 with ornithe; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Ornithe Standard Libraries first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.19.0. It opens that exact file at the source.
About this project
What does Legacy Fabric API add?
Legacy Fabric API is the core library for the most common hooks and inter compatibility measures utilized by mods using the Legacy Fabric toolchain.
More information and full installation instructions can be found on the Legacy Fabric website and support can be found on the Legacy Fabric discord server.
This is SEPARATE from the Fabric loader! You need both for most mods!
Join our discord server for help: https://discord.gg/yBTpRXe
Join us on #legacyfabric on irc.esper.net
Project description from Modrinth.
Pick your setup
Legacy Fabric API by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
17w31a
1 loader build16w50a
1 loader build16w15b
1 loader build16w15a
1 loader build16w14a
1 loader build15w49a
1 loader build15w47c
1 loader build15w47b
1 loader build15w47a
1 loader build15w46a
1 loader build15w45a
1 loader build15w44b
1 loader buildShowing the newest 12 of 168 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Legacy Fabric API versions and loaders
1.19.0
legacy-fabric-api-1.19.0.jar
25 Jun 2026
1.18.3
legacy-fabric-api-1.18.3.jar
14 Jun 2026
Looking for an older file? The official Modrinth project page is in Resources.