Ozmium S&box
Connect AI coding assistants to the S&box editor using the Model Context Protocol (MCP). While you're building your game, your AI assistant can see inside the editor in real time — reading your scene, listing GameObjects, and running console commands
What is Ozmium S&box?
Ozmium S&box is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to connect ai coding assistants to the s&box editor using the model context protocol (mcp). while you're building your game, your ai assistant can see inside the editor in real time — reading your scene,...
Connect AI coding assistants to the S&box editor using the Model Context Protocol (MCP). While you're building your game, your AI assistant can see inside the editor in real time — reading your scene, listing GameObjects, and running console commands
This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- Connect AI coding assistants to the S&box editor using the M
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx ozmium-mcp-server-for-sboxConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Ozmium S&box
Ozmium MCP Server for S&box bridges AI coding assistants directly to the S&box game editor using the Model Context Protocol over a local SSE connection on port 8098. With 95 tools across 12 categories, it gives your AI full real-time visibility into your scene — reading GameObjects, modifying components, instantiating prefabs, controlling play mode, and running console commands — all without leaving your editor or copy-pasting code.
Prerequisites
- S&box game engine installed and running
- Ozmium MCP plugin added via the S&box Library Manager or as a git submodule at Libraries/ozmium.oz_mcp
- An MCP-compatible AI client such as Claude Desktop
- No external API keys required — the server runs entirely on localhost
Add the Ozmium plugin to your S&box project
Add the plugin via the S&box Library Manager or as a git submodule placed at Libraries/ozmium.oz_mcp inside your project. Allow S&box to compile the plugin after adding it.
git submodule add https://github.com/ozmium7/Ozmium-MCP-Server-for-Sbox Libraries/ozmium.oz_mcpStart the MCP server inside the S&box editor
Open the S&box editor, navigate to Editor → MCP → Open MCP Panel, then click Start MCP Server. The status indicator turns green when the server is listening on localhost:8098 via SSE.
Configure your AI client to connect via SSE
Add the SSE endpoint to your MCP client configuration. The server uses type 'sse' and connects to http://localhost:8098/sse. No authentication is needed.
{
"mcpServers": {
"sbox": {
"url": "http://localhost:8098/sse",
"type": "sse"
}
}
}Verify the connection
Ask your AI assistant to list GameObjects in the current scene. If the server is running and connected correctly, it will return a live list of objects from your open scene.
Explore the 95 available tools
The server exposes tools across 12 categories: Scene Read, Scene Write, Assets, Editor, Console, Mesh, Physics, Audio, Lighting, Effects, and more. Use natural language to interact with your scene without context-switching.
Ozmium S&box Examples
Client configuration (Claude Desktop)
Add this to your Claude Desktop config file to connect to the locally running S&box MCP server.
{
"mcpServers": {
"sbox": {
"url": "http://localhost:8098/sse",
"type": "sse"
}
}
}Prompts to try
Real-time scene interaction prompts that leverage the 95 tools available in the Ozmium server.
- "List all GameObjects in the current scene and their components"
- "Create a new GameObject called 'Player' and add a CharacterController component"
- "Find all GameObjects within a 10-unit radius of the origin"
- "Run the 'noclip' console command"
- "Start play mode and tell me when it's running"Troubleshooting Ozmium S&box
Status indicator stays red after clicking Start MCP Server
Ensure the plugin compiled successfully — check the S&box console for compilation errors. Restart the editor after resolving any compile errors, then try starting the server again.
AI client cannot connect to http://localhost:8098/sse
Confirm the MCP server is running (green indicator in the MCP Panel). Some AI clients require the server to be running before the client is launched. Also verify no firewall rule is blocking port 8098 on localhost.
Tools return stale or empty scene data
The server reads scene state in real time. Make sure you have a scene open in the S&box editor. If you recently changed scenes, the server automatically reflects the new scene on the next tool call.
Frequently Asked Questions about Ozmium S&box
What is Ozmium S&box?
Ozmium S&box is a Model Context Protocol (MCP) server that connect ai coding assistants to the s&box editor using the model context protocol (mcp). while you're building your game, your ai assistant can see inside the editor in real time — reading your scene, listing gameobjects, and running console commands It connects AI assistants to external tools and data sources through a standardized interface.
How do I install Ozmium S&box?
Follow the installation instructions on the Ozmium S&box GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with Ozmium S&box?
Ozmium S&box works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is Ozmium S&box free to use?
Yes, Ozmium S&box is open source and available under the GPL-3.0 license. You can use it freely in both personal and commercial projects.
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Set Up Ozmium S&box in Your Editor
Choose your AI client for step-by-step setup instructions.
Quick Config Preview
Add this to your claude_desktop_config.json or .cursor/mcp.json
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