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ComfyUI Builder

io.github.MIt9/comfy-ui-builder ยท v2.4.1

ComfyUI MCP server: knowledge base, workflow builder, real-time execution, models, plugins.

Source code Set it up

Connect Runs on your machine

Terminal
claude mcp add comfy-ui-builder -e COMFYUI_HOST=<COMFYUI_HOST> -e COMFYUI_PATH=<COMFYUI_PATH> -e COMFYUI_KNOWLEDGE_DIR=<COMFYUI_KNOWLEDGE_DIR> -- npx -y [email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "comfy-ui-builder": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "COMFYUI_HOST": "<COMFYUI_HOST>",
        "COMFYUI_PATH": "<COMFYUI_PATH>",
        "COMFYUI_KNOWLEDGE_DIR": "<COMFYUI_KNOWLEDGE_DIR>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "comfy-ui-builder": {
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "COMFYUI_HOST": "<COMFYUI_HOST>",
        "COMFYUI_PATH": "<COMFYUI_PATH>",
        "COMFYUI_KNOWLEDGE_DIR": "<COMFYUI_KNOWLEDGE_DIR>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "comfy-ui-builder": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "[email protected]"
      ],
      "env": {
        "COMFYUI_HOST": "<COMFYUI_HOST>",
        "COMFYUI_PATH": "<COMFYUI_PATH>",
        "COMFYUI_KNOWLEDGE_DIR": "<COMFYUI_KNOWLEDGE_DIR>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
COMFYUI_HOST
Optional		ComfyUI API URL (e.g. http://127.0.0.1:8188). Required for execution, queue, outputs.
COMFYUI_PATH
Optional		Path to ComfyUI install. Required for install_custom_node, install_model.
COMFYUI_KNOWLEDGE_DIR
Optional		Path to knowledge directory (default: package knowledge/). Use when MCP runs from different cwd.

Details

Package[email protected] (NPM, stdio)
First published3 Feb 2026
Last updated3 Feb 2026
Registry nameio.github.MIt9/comfy-ui-builder

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