MCP for Unreal Engine

Let AI Control Your UE5 Scenes

Use the same MCP technology that powers Ralpha under the hood. Connect Claude, GPT, or any AI to Unreal Engine 5 with 3,000+ commands.

Plugin v1.0.0 for Unreal Engine 5.7

Download Plugin

Windows

~440 MB

Windows 10/11, UE5.7+

Plugin (RalphaCore Runtime) + Go MCP bridge + ralpha-brain binary + 32 skills + docs

macOS

~440 MB

Apple Silicon & Intel, UE5.7+

Plugin (RalphaCore Runtime) + Go MCP bridge + ralpha-brain binary + 32 skills + docs

Linux

~440 MB

Ubuntu 22.04+, UE5.7+

Plugin (RalphaCore Runtime) + Go MCP bridge + ralpha-brain binary + 32 skills + docs

MCP Bridge included — a Go binary is bundled with the plugin. No separate download or Node.js required.

Quick Start

1
Extract plugin to your UE5 project
YourProject/Plugins/RalphaPlugin/
2
Launch UE5 — MCP server starts on port 30010
Check Output Log for "MCP Server listening on port 30010"
3
Point your AI client at the brain gateway
In Claude Desktop / Cursor / Codex config: ralpha-brain serve — exposes brain tools + 3,000+ plugin commands as one MCP server
4
Ask your AI to compose a scene
"Make me a sunset over water like this photo. Put a MetaHuman in the middle and have her say hello."

What's Included

258 C++ command handlers, 3,000+ commands over TCP

Local 3D harness — orchestration runs entirely on your machine

26+ deterministic physics tools (sun position, exposure, horizon, tides, terrain)

Capability contracts — every produced scene validated against expected factory shape

Built-in MuJoCo physics — real forces, robot simulation, RL training

Built-in real-time lip sync — 82 channels at 50fps, live NPC conversations

Scene control: lighting, atmosphere, camera, materials, post-process

Characters: MetaHuman, animation, IK, crowds, dialogue performance

Works in editor AND packaged game builds

Full undo support — every command is Ctrl+Z-able

Bring your own LLM — Anthropic, OpenAI, Google, local Ollama / vLLM

30-day free trial of daily updates included with your purchase

258 command handlers, 3,000+ commands — full reference (PDF)

Available on FAB

Full C++ source code. Both tiers include the identical plugin — no feature gating.

Individual

Indie

$99/one-time

Individuals and companies under $100K annual revenue

Full plugin — all 258 handlers, all features
Local brain binary (lean, ~340 MB per platform)
32 expert specialist skills + GOLDEN_RULES
Win64 + Mac + Linux
30-day free trial of daily updates ($10/mo Indie · $25/mo Studio per seat after)
Perpetual license — works forever even if updates lapse

Studio

$499/one-time

Companies with $100K+ annual revenue (per seat)

Same full plugin — all 258 handlers, all features
Local brain binary (lean, ~340 MB per platform)
32 expert specialist skills + GOLDEN_RULES
Win64 + Mac + Linux
30-day free trial of daily updates ($10/mo Indie · $25/mo Studio per seat after)
Commercial-use rights for studios above the revenue threshold

Ralpha Brain

Included

The local 3D harness binary that wraps your AI client. Adds 26+ deterministic physics tools (sun position, exposure, horizon, tides, terrain, camera solver), capability contracts that validate scene shape, the decompose/iterate/refine/score loop, and an intelligence layer that fixes hallucinated command names before they hit the plugin. Runs locally; brings its own LLM via your existing Anthropic, OpenAI, Google, or local Ollama / vLLM key.

Manage from the brain CLI: ralpha-brain login, ralpha-brain serve, ralpha-brain doctor.

Expert Skills — Included

130 specialist skills for sky, sunset, water, clouds, post-processing, geolocation, props, and more. Included in the plugin download and FAB listing. Use them as slash commands in Claude Code or Codex.

Plugin licensed through the FAB listing. Public lean brain source is CC BY-NC 4.0 for non-commercial audit and experimentation.
Questions? support@ralpha.io