Unreal Engine MCP

Name: Unreal Engine MCP
Author: ChiR24

by ChiR24version 0.6.1-beta-ai★ –iRuns on your computer

Registry nameio.github.ChiR24/unreal-engine-mcp

Install

Overview

Description from the maker (original English)

EngineWire: drive the Unreal Editor (UE 5.0-5.8): levels, Blueprints, UI, materials, VFX and more.

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: UE_PROJECT_PATH, MCP_AUTOMATION_CAPABILITY_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: UE_PROJECT_PATH, MCP_AUTOMATION_CAPABILITY_TOKEN, UNREAL_MCP_URL, LOG_LEVEL

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": {
    "unreal-engine": {
      "command": "npx",
      "args": [
        "-y",
        "unreal-engine-mcp-server"
      ],
      "env": {
        "UE_PROJECT_PATH": "your-value",
        "MCP_AUTOMATION_CAPABILITY_TOKEN": "your-value",
        "UNREAL_MCP_URL": "your-value",
        "LOG_LEVEL": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add unreal-engine --env UE_PROJECT_PATH=your-value --env MCP_AUTOMATION_CAPABILITY_TOKEN=your-value --env UNREAL_MCP_URL=your-value --env LOG_LEVEL=your-value -- npx -y unreal-engine-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": {
    "unreal-engine": {
      "command": "npx",
      "args": [
        "-y",
        "unreal-engine-mcp-server"
      ],
      "env": {
        "UE_PROJECT_PATH": "your-value",
        "MCP_AUTOMATION_CAPABILITY_TOKEN": "your-value",
        "UNREAL_MCP_URL": "your-value",
        "LOG_LEVEL": "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": {
    "unreal-engine": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "unreal-engine-mcp-server"
      ],
      "env": {
        "UE_PROJECT_PATH": "your-value",
        "MCP_AUTOMATION_CAPABILITY_TOKEN": "your-value",
        "UNREAL_MCP_URL": "your-value",
        "LOG_LEVEL": "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

UE_PROJECT_PATH required env
Your Unreal project folder or its .uproject file. The server reads the capability token from /Saved/MCP/capability-token.
MCP_AUTOMATION_CAPABILITY_TOKEN secret env
Capability token to present to the editor. Only needed when the server cannot read the project folder.
UNREAL_MCP_URL env
The editor's native MCP endpoint (Project Settings > EngineWire > Native MCP Port).
LOG_LEVEL env
Log level. Logs go to stderr.

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 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account ChiR24, 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 4923 servers in this category
Published to the registry more recently than 96% of the other 4923 servers in this category
Basic checks equal to or better than 100% of the other 4923 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 Unreal Engine MCP 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: UE_PROJECT_PATH, MCP_AUTOMATION_CAPABILITY_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 (0.6.1-beta-a) 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.

EngineWire

EngineWire connects Claude, Cursor, VS Code or any other MCP client to a running Unreal Editor,

and let it build levels, Blueprints, UI, materials, effects and more, through a native C++ editor plugin.

🧭 One tool, over 400 capabilities · ⚙️ Native C++ editor plugin · 🌐 HTTP or stdio · 🔐 Local and token-protected by default · 🎮 Unreal Engine 5.0 – 5.8

🌐 enginewire.dev · 🛒 Fab · 🚀 Quick Start · 📖 Wiki · 📦 Releases · 💬 Discussions

📌 Which version is this? This README describes 0.6.0, the stable release: the plugin on Fab and on the Releases page, and npm unreal-engine-mcp-server (latest). The previous release, 0.5.30, exposes 23 separate tools instead of one; staying on a 0.5.30 plugin means pinning unreal-engine-mcp-server@0.5.30. See Upgrading from 0.5.x.

Contents · What it does · How it works · Quick start · The unreal tool · Configuration · Security · Engine plugins · Docker · Documentation · Development · Community

What it does

🏗️ Levels and actors

Spawn one actor or hundreds in a single call, place and attach them, find the ones sunk into the floor, and load, stream and save levels.

🧩 Blueprints and UI

Create Blueprints, variables and components, build whole event graphs in one batch, and lay out UMG widgets, with a preview image to check them.

🎨 Materials and worlds

Material graphs and instances, procedural textures, lighting, landscapes, foliage, Niagara effects and PCG graphs.

🕹️ Gameplay

Characters and animation, Gameplay Ability System, AI (Behavior Trees, State Trees, EQS), inventory, networking and Enhanced Input.

🎬 Cinematics and audio

Level Sequences, cameras, Movie Render Queue and Take Recorder; Sound Cues and MetaSounds.

🧪 Play and verify

Run Play-In-Editor with synthetic input, take screenshots the model can see, read logs, profile, run Python, and package builds.

Over 450 capabilities in all, behind a single MCP tool. The assistant finds them by searching in plain words, so nobody has to learn their names. The full list is the generated Action Reference.

A platformer level built with the MCP, in Unreal Editor 5.8. Bottom right: the plugin's status, MCP :3000 (1) , meaning the native server is running on port 3000 with one client connected.

How it works

The EngineWire plugin runs inside the editor and does all the work, on the editor's game thread, and serves MCP itself. Clients reach it in one of two ways, and both get the same single tool, unreal:

	🌐 Route A · Native HTTP	🧩 Route B · stdio
Path	Client → the plugin's Streamable HTTP server at `http://127.0.0.1:3000/mcp`	Client → `unreal-engine-mcp-server` (Node.js, stdio) → the same `/mcp`
Node.js	Not needed	20.19 or later
Capability token	The client sends it in the `X-MCP-Capability-Token` header	Read from the project, given `UE_PROJECT_PATH`
Editor restarts	The client reconnects by hand	The session stays: calls answer `NOT_CONNECTED` until the editor is back
Best for	Claude Code, Cursor, VS Code, and several clients sharing one editor	Claude Desktop, clients that only launch local commands, and long sessions across editor restarts

Everything listens on 127.0.0.1 and requires the project's capability token unless you change it.

Quick start

The Quick Start page walks through this with screenshots. You need Unreal Engine 5.0 to 5.8. Installing from Fab needs nothing else; building the plugin from source needs a project with C++ code (a Blueprint-only project can install from Fab or use prebuilt binaries).

1. Add the plugin

From Fab (no compiler needed). Get EngineWire on Fab. In the Epic Games Launcher, open Unreal Engine › Library › Fab Library, find EngineWire and click Install to Engine for your engine version. Open your project, enable EngineWire in Edit › Plugins and restart the editor. Fab's 0.6.0 build ships with the native server off: if the status bar reads `MCP off`, turn on Enable Native MCP Server in Edit › Project Settings › Plugins › EngineWire › Native MCP and restart once more. Fab updates follow Epic's review, so the Fab build can trail the newest release here.

From a release. Download EngineWire-plugin- .zip from the newest release on the Releases page, and copy the EngineWire folder it contains into your project:

MyGame/Plugins/EngineWire/

Or use a clone of this repository: copy plugins/EngineWire/, or reference the folder from your .uproject with "AdditionalPluginDirectories": ["C:/Path/To/Unreal_mcp/plugins"].

Open the project and let Unreal rebuild the plugin. When it's loaded, the status bar shows `MCP :3000 (0)`: the plugin serves MCP on port 3000. If you see *"Engine modules cannot be compiled at runtime"*, build the project once in Visual Studio, Rider or Xcode. More in Installation.

https://github.com/user-attachments/assets/d8b86ebc-4364-48c9-9781-de854bf3ef7d

Prebuilt binaries (Blueprint-only projects, teams)

Build the plugin once on a machine with the engine and a compiler, then hand out the zip. No compiler is needed on the target machine:

node scripts/package-plugin.mjs "C:/Program Files/Epic Games/UE_5.7"

This writes build/EngineWire-v -UE5.7- .zip, where is the package.json version (currently 0.6.1-beta-a). Unzip it into YourProject/Plugins/. Binaries only work with the engine minor and platform they were built for: a 5.6 build won't load in 5.5, 5.7 or 5.8.

2. Connect your client

Route A · Native HTTP (no Node.js)

Enable Native MCP Server is on by default (Edit › Project Settings › Plugins › EngineWire, port 3000); Fab's 0.6.0 build ships with it off. A project where it is off needs it on and an editor restart.

Read the capability token the plugin generated: /Saved/MCP/capability-token. Treat it like a password.
Add the server to your client and send the token in the X-MCP-Capability-Token header. Claude Code:

   claude mcp add --transport http unreal-engine http://127.0.0.1:3000/mcp --header "X-MCP-Capability-Token: <token>"

Or in a project .mcp.json (Claude Code), reading the token from an environment variable:

"mcpServers": { "unreal-engine": { "type": "http", "url": "http://127.0.0.1:3000/mcp", "headers": { "X-MCP-Capability-Token": "${UNREAL_MCP_TOKEN}" } } } }

Cursor (.cursor/mcp.json) takes the same url and headers without type. VS Code, Windsurf and others: Connecting Clients.

Check it: when the client connects, the count in the status bar goes up.

Route B · stdio (Node.js 20.19+)

The package is a small stdio proxy in front of the same /mcp. A client connected straight to /mcp loses its session whenever the editor closes or crashes, and has to reconnect by hand. Through the proxy, every call answers NOT_CONNECTED while the editor is down, and the first call after it is back reaches it, with no reconnect. It keeps the editor's last tool list, so a session that starts before the editor still gets the real tool.

Add this to your client's MCP configuration, for example Claude Desktop's claude_desktop_config.json:

"mcpServers": { "unreal-engine": { "command": "npx", "args": ["-y", "unreal-engine-mcp-server"], "env": { "UE_PROJECT_PATH": "C:/Path/To/YourProject" } } } }

Or let the

Only the beginning is shown; read the rest in the repo

Unreal Engine MCP

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

What it does

How it works

Quick start

1. Add the plugin

2. Connect your client