comfyui-mcp

npx -y comfyui-mcp

{
  "mcpServers": {
    "comfyui-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "comfyui-mcp"
      ]
    }
  }
}

Posting a prepared workflow JSON at ComfyUI fails for a boring reason: the graph references checkpoints, LoRAs and custom nodes that this particular install may not have. This server inspects the running instance first, so wiring happens against the models and nodes that are really there, and it can free VRAM between runs instead of falling over on the second render. Edits land on the live graph rather than replacing it, which keeps the human in the loop visually. Installation and port are auto-detected, and one configuration targets a local install, a machine on the LAN, a VPS or Comfy Cloud. Around the tool surface it ships model-specific skills covering samplers, resolutions and file names per architecture.