MCP Fabric (Minecraft)

Name: MCP Fabric (Minecraft)
Author: denfry

by denfryversion 0.9.0i★ –iRuns on your computer

Registry nameio.github.denfry/mcpfabric

Install

Overview

Description from the maker (original English)

See and play Minecraft: Java Edition through the mcpfabric mod (Fabric and NeoForge).

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Developer tools
You need to fill in: MCPFABRIC_TOKEN

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: MCPFABRIC_TOKEN, MCPFABRIC_TOOLSETS

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "mcpfabric": {
      "command": "npx",
      "args": [
        "-y",
        "mcpfabric-mcp-server"
      ],
      "env": {
        "MCPFABRIC_TOKEN": "your-value",
        "MCPFABRIC_TOOLSETS": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add mcpfabric --env MCPFABRIC_TOKEN=your-value --env MCPFABRIC_TOOLSETS=your-value -- npx -y mcpfabric-mcp-server

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "mcpfabric": {
      "command": "npx",
      "args": [
        "-y",
        "mcpfabric-mcp-server"
      ],
      "env": {
        "MCPFABRIC_TOKEN": "your-value",
        "MCPFABRIC_TOOLSETS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "mcpfabric": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mcpfabric-mcp-server"
      ],
      "env": {
        "MCPFABRIC_TOKEN": "your-value",
        "MCPFABRIC_TOOLSETS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

MCPFABRIC_TOKEN secret env
Bridge token; not needed while the game writes ~/.mcpfabric/bridge.json.
MCPFABRIC_TOOLSETS env
Serve only some tools: profiles play, admin, build or tool groups.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account denfry, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Developer toolsi

More stars than 0% of the other 4906 servers in this category
Published to the registry more recently than 96% of the other 4906 servers in this category
Basic checks equal to or better than 100% of the other 4906 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is MCP Fabric (Minecraft) safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: MCPFABRIC_TOKEN

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.9.0) reached the registry yesterday.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: GitHub, Desktop Commander, Cloudflare MCP

Alternatives

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

mcpfabric MCP server

Bridges an MCP client (Claude Desktop / Claude Code / any MCP host) to the in-game HTTP bridge exposed by the mcpfabric mod (Fabric / NeoForge), publishing ~50 tools to observe and control Minecraft, plus an agent runtime with persistent memory, goals, a world map and background jobs (see docs/AGENT.md). Requires Node.js ≥ 22.16.

Install from npm

npx -y mcpfabric-mcp-server          # or: npm install -g mcpfabric-mcp-server && mcpfabric

In an MCP client config:

"mcpServers": { "mcpfabric": { "command": "npx", "args": ["-y", "mcpfabric-mcp-server"], "env": { "MCPFABRIC_TOKEN": "paste-the-token-from-the-mod-config" } } } }

Build from source

npm install

npm run build # -> dist/index.js npm run typecheck # tsc --noEmit (sources and tests) npm test # unit tests + agent jobs against a simulated world

Run

The MCP client normally launches this process. Manually:

MCPFABRIC_URL=http://127.0.0.1:25599 MCPFABRIC_TOKEN=<token> node dist/index.js

Environment

Variable	Default	Meaning
`MCPFABRIC_URL`	`http://127.0.0.1:25599`	In-game bridge base URL.
`MCPFABRIC_TOKEN`	—	Bearer token from `config/mcpfabric.config.json`.
`MCPFABRIC_TIMEOUT_MS`	`15000`	Per-call timeout.
`MCPFABRIC_TRANSPORT`	`stdio`	`stdio` (default) or `http`.
`MCPFABRIC_HTTP_PORT`	`25600`	Port for the streamable-HTTP transport (`/mcp`).
`MCPFABRIC_AGENT`	on	`0`/`false`/`off` disables the agent runtime tools.
`MCPFABRIC_DATA_DIR`	`~/.mcpfabric`	Directory of the agent database (`agent.db`).
`MCPFABRIC_WORLD`	reported by the game	Force the world id that keys agent memory.
`MCPFABRIC_SCRIPTS`	on	`0`/`false`/`off` removes the script tools (`run_script`, skills).

Architecture

src/tools.ts is the single source of truth for the tool catalogue: each entry maps an MCP tool to a bridge RPC method plus a zod input schema. src/index.ts registers every entry generically (forwarding args to POST /rpc) and renders results as JSON, except screenshot which returns an image content block. src/bridge.ts is the HTTP client; src/config.ts reads env config.

src/agent/ is the agent runtime: its tools (agent/tools.ts) run in this process, store state in SQLite (node:sqlite) and drive the game through the same bridge. test/fake-world.ts simulates the bridge contract so jobs are tested without a game.

src/script/ is code mode: run_script runs a model-written JavaScript program in QuickJS (WebAssembly, quickjs-emscripten), which reaches the game only through the catalogue methods of src/tools.ts; save_skill / run_skill keep programs per world in the agent database.

Keep tool names/methods in sync with the Java handler registry in the mod (dev.mcpfabric.handlers.* and dev.mcpfabric.client.handlers.*).

MCP Fabric (Minecraft)

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Developer toolsi

Common questions

Alternatives

GitHub

Desktop Commander

Cloudflare MCP

README from the maker

mcpfabric MCP server

Install from npm

Build from source

Run

Environment

Architecture