Direct answer
Fabric API is a collection of common modding APIs; it is not the Fabric Loader itself. Install Fabric API only when the server modpack or a mod dependency requires it.
Recommended procedure
- Install a Fabric server loader release compatible with your Minecraft version.
- Check the modpack manifest or mod error for a required Fabric API version.
- Place the correct Fabric API JAR in
mods/beside required server mods, then restart. - For clients, follow each mod’s client/server dependency requirements rather than assuming every server mod must be client-installed.
Why this matters
A missing API dependency can stop a mod during loader initialization. Installing an arbitrary newer Fabric API built for another Minecraft release does not necessarily satisfy the dependency.
How to verify the result
Read the first requires fabric-api or loader dependency message in the startup log, then verify the next startup registers all required mods.
Version and compatibility notes
Fabric API is not needed by every Fabric mod. Avoid mixing Forge/NeoForge builds into the Fabric mods/ folder.
Official references
These sources were checked for the current MSH revision. Version-sensitive details should always be confirmed against the project documentation for the release you run.
Related guides
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