Start ComfyUI

Install and start ComfyUI using its official installation guide. PixelKiln connects to http://127.0.0.1:8188 by default. Set a different URL only when ComfyUI listens elsewhere:

COMFYUI_BASE_URL=http://127.0.0.1:8188

No API key is required for the standard local server. Keep an unauthenticated server on loopback. If you expose it to another machine, put authentication and TLS in front of it, then point COMFYUI_BASE_URL at that protected endpoint.

Check the connection without generating an image:

pixelkiln doctor