vrchat-mcp-osc

Source

VRChat MCP OSC provides a bridge between AI assistants and VRChat using the Model Context Protocol (MCP), enabling AI-driven avatar control and interactions in virtual reality environments. By leveraging OSC (Open Sound Control) to communicate with VRChat, VRChat MCP OSC allows AI assistants such as Claude to: Control avatar parameters and expressions Send messages in VRChat Respond to various VR events And more—all through the high-level API provided by the Model Context Protocol.

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Overview

VRChat MCP OSC is a tool that bridges AI assistants with VRChat using the Model Context Protocol (MCP), enabling AI-driven avatar control and interactions in virtual reality environments.

To use VRChat MCP OSC, clone the repository from GitHub, link it with npm, and configure it with Claude Desktop by editing the configuration file to set up the necessary parameters for OSC communication.

Control avatar parameters and expressions - Send messages in VRChat - Respond to various VR events - Access VRChat menu and interface elements - Query avatar properties and parameters

Enabling AI assistants to control avatars in VRChat.
Facilitating communication between users and AI in virtual environments.
Enhancing user interactions in VRChat through automated avatar actions.

Add to your AI client

Use these steps to connect vrchat-mcp-osc in Cursor, Claude, VS Code, and other MCP-compatible apps. The same JSON appears in the Use with menu above for one-click copy.

Cursor

Add this to your .cursor/mcp.json file in your project root, then restart Cursor.

.cursor/mcp.json

{
  "mcpServers": {
    "vrchat-mcp-osc-krekun": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-vrchat-mcp-osc-krekun"
      ]
    }
  }
}

Claude Desktop

Add this server entry to the mcpServers object in your Claude Desktop config, then restart the app.

~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

{
  "mcpServers": {
    "vrchat-mcp-osc-krekun": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-vrchat-mcp-osc-krekun"
      ]
    }
  }
}

Claude Code

Add this to your project's .mcp.json file. Claude Code will detect it automatically.

.mcp.json (project root)

{
  "mcpServers": {
    "vrchat-mcp-osc-krekun": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-vrchat-mcp-osc-krekun"
      ]
    }
  }
}

VS Code (Copilot)

Add this to your .vscode/mcp.json file. Requires the GitHub Copilot extension with MCP support enabled.

.vscode/mcp.json

{
  "servers": {
    "vrchat-mcp-osc-krekun": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-vrchat-mcp-osc-krekun"
      ]
    }
  }
}

Windsurf

Add this to your Windsurf MCP config file, then restart Windsurf.

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "vrchat-mcp-osc-krekun": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-vrchat-mcp-osc-krekun"
      ]
    }
  }
}

Cline

Open Cline settings, navigate to MCP Servers, and add this server configuration.

Cline MCP Settings (via UI)

{
  "mcpServers": {
    "vrchat-mcp-osc-krekun": {
      "command": "npx",
      "args": [
        "-y",
        "@modelcontextprotocol/server-vrchat-mcp-osc-krekun"
      ]
    }
  }
}

FAQ

What are the system requirements?

Node.js 18 or higher and VRChat with OSC enabled.

Can I use it for commercial purposes?

Yes, but a separate commercial license is required.

What should I do if VRChat is not responding to commands?

Ensure OSC is enabled in VRChat settings and check the OSC ports match between VRChat and MCP configuration.

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