Version download guide
Fabric API 1.21.4 Download
Use the direct official Maven download below if this Fabric API version exists. Install Fabric Loader first, then place Fabric API and your other Fabric mods in the mods folder.
Direct Maven .jar download
Download fabric-api-1.21.4.jar from maven.fabricmc.net.
Fabric Loader Meta API
Check official loader versions from Fabric Meta before adding Fabric API.
GitHub release list
Check release tags and notes from the open-source Fabric API repository.
This page is an unofficial guide and does not host .jar files. The primary download link points directly to the official Fabric Maven repository.