Editor Mcp Server
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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_entitiescreate_entitiesdelete_entitiesduplicate_entitiesmodify_entitiesreparent_entityadd_componentsremove_componentsadd_script_component_script
- Asset
list_assetscreate_assetsdelete_assetsinstantiate_template_assetsset_script_textscript_parseset_material_diffuse
- Scene
query_scene_settingsmodify_scene_settings
- Store
store_searchstore_getstore_download
Installation
Run npm install to install all dependencies.
Install Chrome Extension
- Visit
chrome://extensions/and enable Developer mode - Click
Load unpackedand select theextensionsfolder - 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
- Install Claude Desktop.
- Go to
Claude>Settings. - Select
Developerand thenEdit Config. - This will open
claude_desktop_config.json, your MCP Config JSON file.
Cursor
- Install Cursor.
- Select
File>Preferences>Cursor Settings. - Click
+ Add new global MCP server. - 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:
- Activate a Chrome tab running the PlayCanvas Editor.
- Select the Extensions icon to the right of the address bar.
- Select PlayCanvas Editor MCP Extension to open the extension popup.
- 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.