Add comment in example script denoting how to use api keys without needing frontend

[christian-byrne]

Since #8041, you can use API keys via the webserver API directly, without needing any particular frontend (or a frontend at all).

This means you can create workflows that combine (a) local OS models, (b) tools from the custom node community, and (c) popular paid models and => run everything together via the local Comfy webserver API, letting it handle all the orchestration.

This can benefit users who use Comfy as a backend service, run Comfy via the command line, have their own frontend, and so on.

Here is an example I did: running a workflow that contains the BFL Flux 1.1[pro] Ultra T2I (chosen randomly) in the terminal (via comfy-cli)

You can see that the workflow embedded in the output is API format but doesn't persist the API key.

ExifTool Version Number         : 12.76
File Name                       : ComfyUI_02382_.png
Directory                       : /home/c_byrne/projects/comfy-testing-environment/ComfyUI-private/output
File Size                       : 6.6 MB
File Modification Date/Time     : 2025:05:12 17:11:54-07:00
File Access Date/Time           : 2025:05:12 17:13:50-07:00
File Inode Change Date/Time     : 2025:05:12 17:11:54-07:00
File Permissions                : -rw-rw-r--
File Type                       : PNG
File Type Extension             : png
MIME Type                       : image/png
Image Width                     : 2048
Image Height                    : 2048
Bit Depth                       : 8
Color Type                      : RGB with Alpha
Compression                     : Deflate/Inflate
Filter                          : Adaptive
Interlace                       : Noninterlaced
Prompt                          : {"11": {"inputs": {"prompt": "A dreamy, surreal half-body portrait of a young woman meditating. She has a short, straight bob haircut dyed in pastel pink, with soft bangs covering her forehead. Her eyes are gently closed, and her hands are raised in a calm, open-palmed meditative pose, fingers slightly curved, as if levitating or in deep concentration. She wears a colorful dress made of patchwork-like pastel tiles, featuring clouds, stars, and rainbows. Around her float translucent, iridescent soap bubbles reflecting the rainbow hues. The background is a fantastical sky filled with cotton-candy clouds and vivid rainbow waves, giving the entire scene a magical, dreamlike atmosphere. Emphasis on youthful serenity, whimsical ambiance, and vibrant soft lighting.", "prompt_upsampling": false, "seed": 589991183902375, "aspect_ratio": "1:1", "raw": false, "image_prompt_strength": 0.4000000000000001, "image_prompt": ["14", 0]}, "class_type": "FluxProUltraImageNode", "_meta": {"title": "Flux 1.1 [pro] Ultra Image"}}, "12": {"inputs": {"filename_prefix": "ComfyUI", "images": ["11", 0]}, "class_type": "SaveImage", "_meta": {"title": "Save Image"}}, "14": {"inputs": {"image": "example.png"}, "class_type": "LoadImage", "_meta": {"title": "Load Image"}, "is_changed": ["a8e215ad32a0052fc4190e9c5863428d5ee35cd98b246243842ba8360511b7c4"]}}
Image Size                      : 2048x2048
Megapixels                      : 4.2