Fabric API MCP Server
A Model Context Protocol (MCP) server that runs inside Minecraft Java Edition as a Fabric mod. It exposes the server-side Minecraft API and the Fabric API as MCP tools so Claude, Cursor, etc. can read and manipulate a live world programmatically.
Screenshots
About this Mod
A Model Context Protocol (MCP) server that runs inside Minecraft Java Edition as a Fabric mod. It exposes the server-side Minecraft API and the Fabric API as MCP tools so an MCP client — Claude Desktop, Cursor, or any agent that speaks MCP — can read and manipulate a live world programmatically.
Works with the accompanying plugin for Claude Code: https://github.com/chapmanjw/minecraft-java-fabric-claude-plugin
Requires the Fabric API: https://modrinth.com/mod/fabric-api
Available Versions
How to Install Fabric API MCP Server on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1.2).
Install Mod
Open the mod browser in the dashboard and search for "Fabric API MCP Server". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2, 26.1.1, 1.21.11
Server-side
~ OptionalRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Fabric API MCP Server server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.1.2). You can switch loaders with one click in the panel.
Is Fabric API MCP Server compatible with fabric?
Fabric API MCP Server officially supports fabric for Minecraft 26.1.2, 26.1.1, 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Fabric API MCP Server – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Fabric API MCP Server consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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