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117+ GitHub stars with active community development
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Open source under MIT license — free to use and modify
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MCP server connecting AI assistants to Unreal Editor
What is Claireon (Unreal MCP)? Features and use cases explained.
About Claireon (Unreal MCP)
Claireon is an Unreal Engine editor plugin that runs a Model Context Protocol (MCP) server inside the editor, exposing hundreds of editor automation tools for AI-assisted development. It enables AI assistants like Claude Code to read, search, inspect, and edit Unreal assets directly via a small MCP surface (tool_search + python_execute). Supports Blueprint editing, animation, behavior trees, Niagara, PCG, data tables, sequences, camera assets, and more. Best for Unreal developers who want to speed up their workflow with natural language commands.
Use Cases
- ▸Edit Blueprint logic when refining gameplay mechanics without manual node dragging
- ▸Manage and search assets when working with large Unreal projects containing thousands of files
- ▸Analyze performance traces when debugging frame rate issues using Unreal Insights
- ▸Create and modify animation sequences when prototyping character movements
Features
- ✓Searches and discovers editor tools using hybrid retrieval with SQLite FTS5 and embedding models
- ✓Edits Blueprint graphs, properties, components, and connections directly from an AI assistant
- ✓Manages assets with full CRUD operations including search, validation, resave, and cooking
- ✓Integrates with Play-In-Editor to start/stop sessions, query actors, and test gameplay
- ✓Executes arbitrary Python scripts in the editor with audit logging and security controls
FAQ
Does Claireon work with my existing Unreal Engine 5 project?▼
Yes, Claireon installs as a plugin in Unreal Engine 5.x without modifying your project structure. It works with any UE5 project and can be enabled per-project via the Plugin Manager.
What AI assistants are compatible with Claireon?▼
Claireon works with any MCP-compatible AI assistant, including Claude Code, Cursor, and others. It exposes a standard MCP server using Streamable HTTP transport.
What are the system requirements?▼
Unreal Engine 5.x (tested with 5.5+), Windows 64-bit. Python 3 plugin enabled in UE. Other platforms may work but are untested.
How to install Claireon (Unreal MCP) — setup guide and prerequisites.
Installation
Install Claireon (Unreal MCP) to get started:
$git clone https://github.com/believer-oss/claireon.git
Or visit the project page for detailed setup instructions.
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