Editor Mcp Server

What is Editor Mcp Server

The editor-mcp-server is an MCP Server designed for automating the PlayCanvas Editor using a large language model (LLM), specifically tailored to enhance the development experience within the PlayCanvas environment.

Use cases

Use cases for the editor-mcp-server include automating repetitive tasks in the PlayCanvas Editor, enhancing productivity for game developers, and integrating AI-driven functionalities to improve project workflows.

How to use

To use the editor-mcp-server, install the necessary dependencies via npm, set up the Chrome extension, and run the MCP Server using either Claude Desktop or Cursor. Ensure you configure the MCP Config JSON file correctly for your operating system.

Key features

Key features include creating, modifying, duplicating, and deleting entities; managing components and assets; creating scripts; and modifying scene settings. The server supports a variety of automation tools to streamline the development process.

Where to use

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An MCP Server for automating the PlayCanvas Editor using an LLM.

[!IMPORTANT]
At the moment, the MCP Server needs to be driven by Anthropic’s Claude. Our experience shows that the free tier for Claude does not deliver a big enough chat context to operate the MCP Server reliably. Therefore, we strongly recommend subscribing to a Pro Claude account.

Available Tools

• Entity
  • list_entities
  • create_entities
  • delete_entities
  • duplicate_entities
  • modify_entities
  • reparent_entity
  • add_components
  • remove_components
  • add_script_component_script
• Asset
  • list_assets
  • create_assets
  • delete_assets
  • instantiate_template_assets
  • set_script_text
  • script_parse
  • set_material_diffuse
• Scene
  • query_scene_settings
  • modify_scene_settings
• Store
  • store_search
  • store_get
  • store_download

Installation

Run npm install to install all dependencies.

Install Chrome Extension

1. Visit chrome://extensions/ and enable Developer mode
2. Click Load unpacked and select the extensions folder
3. Load the PlayCanvas Editor. The extension should be loaded.

Run MCP Server

The MCP Server can be driven by Cursor or Claude Desktop.

[!TIP]
We have found Claude Desktop to be generally more reliable.

Claude Desktop

1. Install Claude Desktop.
2. Go to Claude > Settings.
3. Select Developer and then Edit Config.
4. This will open claude_desktop_config.json, your MCP Config JSON file.

Cursor

1. Install Cursor.
2. Select File > Preferences > Cursor Settings.
3. Click + Add new global MCP server.
4. This will open mcp.json, your MCP Config JSON file.

[!TIP]
Also in Cursor Settings, select Features and scroll to the Chat section. Activate Enable auto-run mode to allow the LLM to run MCP tools without requiring constant authorization. You do this at your own risk (but we prefer it)!

[!IMPORTANT]
In Cursor, ensure you have Agent selected. Ask and Edit modes will not recognize the MCP Server.

MCP Config JSON File

This is how your config should look:

Windows

{
  "mcpServers": {
    "playcanvas": {
      "command": "cmd",
      "args": [
        "/c",
        "npx",
        "tsx",
        "C:\\path\\to\\mcp-editor\\src\\server.ts"
      ],
      "env": {
        "PORT": "52000"
      }
    }
  }
}

macOS

{
  "mcpServers": {
    "playcanvas": {
      "command": "npx",
      "args": [
        "tsx",
        "/path/to/mcp-editor/src/server.ts"
      ],
      "env": {
        "PORT": "52000"
      }
    }
  }
}

Connecting the Editor to the MCP Server

The PlayCanvas Editor does not connect to the MCP Server automatically. To connect:

1. Activate a Chrome tab running the PlayCanvas Editor.
2. Select the Extensions icon to the right of the address bar.
3. Select PlayCanvas Editor MCP Extension to open the extension popup.
4. Select CONNECT (the port number should match what is set in your MCP Config JSON File).

[!NOTE]
You can currently only connect one instance of the PlayCanvas Editor to the MCP Server at any one time.

You should now be able to issue commands in Claude Desktop or Cursor.