CurseForge and Overwolf are joining forces!
Fabric API is the core library for the most common hooks and intercompatibility measures utilized by mods using the Fabric toolchain
More infomation and full installation instructions can be found on the Fabric website and support can be found on the Fabric discord server.
This is SEPARATE from the Fabric loader! You need both for most mods!
Keep in mind the project requires the Fabric mod loader!