KrepAPI (Mod)

KrepAPI is a Fabric mod that lets multiplayer servers (via Paper/Spigot plugin messages or a Fabric server with the same protocol) define extra key bindings on your client, react to raw key input when allowed, and optionally require that you have this mod installed.

You only need KrepAPI if the server you play on uses it. It does nothing useful in single-player unless you run matching server-side code yourself.

Features

• Server key bindings — The server sends a list of actions (ids, labels, default GLFW keys, categories). They show up under a dedicated controls category (e.g. “KrepAPI (this server)”). Pressing a bound key notifies the server.
• Handshake — Server can verify protocol version and mod version; misconfigured or missing clients can be disconnected (server policy).
• Raw key pipeline (for developers) — Companion mods can register listeners to observe keys early and optionally block vanilla handling for that event when the design allows (e.g. server-approved overrides).
• Fabric dedicated server — The same mod jar can load on a Fabric server to handle the protocol without Paper.

Requirements

• Minecraft — Match the version your KrepAPI build targets.
• Fabric Loader
• Fabric API

For server owners & developers

Server integration uses a small binary protocol (plugin channels / custom payloads). Reference implementations and docs live in the project repository (protocol layout, Paper sample plugin, client API).

License

See the distributed mod metadata and project license. All rights reserved unless otherwise stated in the Modrinth “License” field.