Unreal Engine Generative AI Support Plugin

What is Unreal Engine Generative AI Support Plugin?

The Unreal Engine Generative AI Support Plugin is a free plugin that integrates large language model (LLM) and generative AI APIs into Unreal Engine projects. It supports OpenAI, Anthropic, DeepSeek, and XAI Grok, and includes MCP (Model Context Protocol) support for AI assistants like Claude to control the Unreal Editor. It is designed for Unreal Engine developers who want to add AI-driven features to their games without building the integration layer from scratch.

How to use Unreal Engine Generative AI Support Plugin?

Install the plugin via Git or the Fab marketplace, then set environment variables like PS_OPENAIAPIKEY or PS_ANTHROPICAPIKEY for each API. Use the provided C++/Blueprint functions for chat, structured outputs, or reasoning. For MCP support, configure the plugin as described in the Setting up MCP section, then connect Claude Desktop, Claude Code, or Cursor.

Key features of Unreal Engine Generative AI Support Plugin

• Supports OpenAI, Anthropic, DeepSeek, and Grok APIs.
• MCP support for Claude Desktop, Claude Code, and Cursor.
• Scene control: spawn, transform, and recolor objects.
• Run Python scripts and console commands.
• Lightweight with no external dependencies.
• Supports Unreal Engine 5.4 to 5.7+ on multiple platforms.

Use cases of Unreal Engine Generative AI Support Plugin

• AI assistants spawning and manipulating scene objects in the editor.
• Generating blueprints, functions, and variables via natural language.
• Creating NPCs driven by OpenAI agents for dynamic storytelling.
• Rapid prototyping by running Python scripts or console commands through AI.

FAQ from Unreal Engine Generative AI Support Plugin

How do I set API keys?

Set an environment variable using the format PS_<ORGNAME>, for example PS_OPENAIAPIKEY for OpenAI. This must be done before starting the Editor and any connected IDE.

Is the plugin free and what are the pro versions?

This free plugin is available forever and covers many use cases. Paid pro plugins on Fab offer 200+ AI models, guaranteed stability, and additional features like local LLMs and 3D generation.

What Unreal Engine versions and platforms are supported?

The free plugin supports Unreal Engine 5.4 to 5.7+ on Windows, Linux, macOS, mobile, and consoles.

What does the MCP support allow?

MCP support lets AI assistants like Claude spawn objects, control transformations and materials, run Python scripts, and generate blueprints. It works with Claude Desktop, Claude Code, and Cursor, but is not actively developed.