Skip to main content
Glama
blackplume233

UnrealMCPHub

by blackplume233
OverviewSchemaRelated ServersScoreDiscussions
Python
Local

UnrealMCPHub

Central management platform for Unreal Engine MCP instances — bridge between AI agents and UE across the full development lifecycle.

Works with RemoteMCP (UE Editor plugin that exposes engine capabilities via MCP protocol). The Hub manages everything around it: install the plugin, compile, launch the editor, detect crashes, and transparently proxy all tool calls — so the AI agent only needs one MCP endpoint.

AI Agent ──► UnrealMCPHub ──► UE Editor + RemoteMCP plugin
              (this repo)       (blackplume233/UnrealRemoteMCP)

RemoteMCP runs inside UE Editor and provides 17+ tools across 6 domains (level, blueprint, umg, edgraph, behaviortree, slate). UnrealMCPHub runs outside UE Editor and can compile, launch, monitor, and proxy — even when UE is not running.

Features

  • Project setup — Configure .uproject once; engine auto-detected from registry

  • Build & launch — Compile via UBT, launch editor, wait for MCP readiness

  • Plugin install — One-click RemoteMCP installation (local copy or GitHub download)

  • Instance discovery — Scan ports to find running UE editors

  • UE tool proxy — ue_run_python, ue_call, ue_list_tools and domain dispatch

  • Crash resilience — Crash detection, report retrieval, restart flow

  • Multi-instance — Switch between multiple UE editors via use_editor

  • Session notes — Persist context for crash recovery

  • One-click overview — hub_status shows project, plugin, instances, and watcher state

Related MCP server: UE Agent Harness

Quick Install

Option A: One-line install from PyPI (recommended)

# uv (recommended)
uv tool install unrealhub

# or pip
pip install unrealhub

Then add to .cursor/mcp.json:

{
  "mcpServers": {
    "unrealhub": {
      "command": "unrealhub",
      "args": ["serve"]
    }
  }
}

Option B: Zero-install (auto-fetch on first launch)

No download, no clone, no install. Paste this single block into .cursor/mcp.json and restart Cursor:

{
  "mcpServers": {
    "unrealhub": {
      "command": "uvx",
      "args": ["unrealhub", "serve"]
    }
  }
}

Requires uv (pip install uv or winget install astral-sh.uv). Cursor will auto-fetch the Hub on first launch.

Option C: Standalone executable (no Python needed)

Download the latest executable for your platform from GitHub Releases, then:

{
  "mcpServers": {
    "unrealhub": {
      "command": "/path/to/unrealhub",
      "args": ["serve"]
    }
  }
}

Platform

File

Windows x64

unrealhub-windows-amd64.exe

macOS ARM

unrealhub-macos-arm64

Linux x64

unrealhub-linux-amd64

Option D: Clone for development

git clone https://github.com/blackplume233/UnrealMCPHub.git
cd UnrealMCPHub
uv sync          # or: pip install -e .
{
  "mcpServers": {
    "unrealhub": {
      "command": "uv",
      "args": ["--directory", "/path/to/UnrealMCPHub", "run", "unrealhub", "serve"]
    }
  }
}

Quick Start

For AI Agents (Cursor / Claude / etc.)

This is the primary use case. Add UnrealMCPHub as an MCP server in your AI tool, then the agent handles everything through natural language.

Step 1: Install & Configure MCP (see Quick Install above)

HTTP mode (for shared / remote / multi-client use):

unrealhub serve --http --port 9422
{
  "mcpServers": {
    "unrealhub": {
      "url": "http://127.0.0.1:9422/mcp"
    }
  }
}

Step 2: Talk to the agent

Once configured, the AI agent has full access to all Hub tools. Example conversations:

You: "帮我编译并启动 UE 项目 D:/Projects/MyGame/MyGame.uproject"
Agent: [calls setup_project, compile_project, launch_editor automatically]

You: "在 UE 里创建一个蓝图 Actor"
Agent: [calls ue_get_dispatch to find blueprint tools, then ue_call_dispatch]

You: "UE 崩溃了怎么办"
Agent: [calls get_crash_report, shows crash info, offers restart_editor]

Step 3: What happens behind the scenes

Agent → Hub (setup_project)     # One-time project config, persisted
Agent → Hub (compile_project)   # Compiles via UBT, even without UE running
Agent → Hub (launch_editor)     # Starts UE, waits for MCP readiness
Agent → Hub (ue_run_python)     # Hub forwards to UE's RemoteMCP
                ↓
        UE Editor (port 8422)   # Executes Python, returns result

The agent only needs to know about the Hub — it never talks to UE directly.

AI Agent Decision Flow

Is project configured?
├── No  → Ask user for .uproject path → setup_project()
└── Yes → Is UE Editor online?
          ├── No  → Need plugin? → install_plugin() → compile_project() → launch_editor()
          └── Yes → Use ue_* tools directly
                    └── Crashed? → get_crash_report() → restart_editor()

For Humans (CLI)

unrealhub setup /path/to/MyProject.uproject   # Configure project
unrealhub serve                                # Start MCP server (stdio)
unrealhub serve --http --port 9422             # Start MCP server (HTTP)
unrealhub status                               # Show instance status
unrealhub discover                             # Discover running UE instances
unrealhub compile                              # Build active project
unrealhub launch                               # Launch editor

Tool Reference

Hub Management (always available, even without UE)

Tool

Description

setup_project

Configure project path (once, persisted to ~/.unrealhub)

get_project_config

View current project configuration

hub_status

One-stop overview of everything

compile_project

Compile project via UBT

launch_editor

Start UE Editor, wait for MCP readiness

restart_editor

Restart a crashed editor

install_plugin

Install RemoteMCP plugin

set_plugin_source

Configure plugin download URL or local path

discover_instances

Scan ports for running UE instances

use_editor

Switch active UE instance (multi-instance)

get_crash_report

Get crash details

add_note / get_notes

Session notes for crash recovery context

UE Proxy Tools (forwarded to active UE instance)

Tool

Description

ue_run_python

Execute Python script in UE

ue_call

Call any UE MCP tool by name

ue_list_tools

List all tools from UE instance

ue_get_dispatch

List domain tools (level, blueprint, umg, etc.)

ue_call_dispatch

Call a domain-specific tool

ue_test_state

Test connection to UE

ue_status

Get active instance status

Architecture

┌─────────────────┐     stdio/HTTP      ┌──────────────────┐
│  Cursor / Agent │ ◄─────────────────► │  UnrealMCPHub    │
└─────────────────┘                     │  (FastMCP Server) │
                                        └────────┬─────────┘
                                                 │
                 ┌───────────────────────────────┼───────────────────────────────┐
                 │                               │                               │
                 ▼                               ▼                               ▼
         ┌───────────────┐              ┌───────────────┐              ┌───────────────┐
         │ Project Mgmt  │              │ Lifecycle     │              │ UE Proxy      │
         │ setup_project │              │ compile       │              │ ue_run_python  │
         │ install_plugin│              │ launch/restart│              │ ue_call        │
         │ hub_status    │              │ discover      │              │ ue_list_tools  │
         └───────────────┘              └───────┬───────┘              └───────┬───────┘
                 │                              │                              │
                 ▼                              │  Streamable HTTP             │
         ┌───────────────┐              ┌──────▼──────────────────────────────▼────────┐
         │ ~/.unrealhub  │              │  UE Editor + RemoteMCP (port 8422)            │
         │ config.json   │              │  17+ tools: run_python, get_dispatch, etc.    │
         │ state.json    │              │  6 domains: level, blueprint, umg, edgraph,   │
         └───────────────┘              │             behaviortree, slate               │
                                        └──────────────────────────────────────────────┘

Development

git clone https://github.com/blackplume233/UnrealMCPHub.git
cd UnrealMCPHub
uv sync --extra dev      # Install with dev dependencies
uv run pytest tests/ -v  # Run tests (129 tests)

Requirements

  • Python >= 3.11

  • Unreal Engine 5.x

  • RemoteMCP — UE Editor plugin (Hub can auto-install it via install_plugin)

License

MIT

This server cannot be installed

A
license - permissive license
-
quality - not tested
C
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
2dRelease cycle
7Releases (12mo)
Commit activity

Resources

Unclaimed servers have limited discoverability.

Looking for Admin?

If you are the server author, to access and configure the admin panel.

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/blackplume233/UnrealMCPHub'

If you have feedback or need assistance with the MCP directory API, please join our Discord server