GET

/v1/schemas/fal/image/rundiffusion-fal/juggernaut-flux/lightning

Accept:

kind inputactivity imagehash e5e747a2…extracted Aug 8, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `5ec59a4ac31d1638c66dc82dcc58dfcedc72f75bb44121a4dafbfd0ae2e90fbc` { "fetchedAt": 1786165357, "extractorVersion": "1", "verifiedAt": null }

Request body

8 properties · 1 required · 1 $defs

property	type	description	constraints
prompt*	string	The prompt to generate an image from.
seed	integer	The same seed and the same prompt given to the same version of the model will output the same image every time.	nullable
enable_safety_checker	boolean	If set to true, the safety checker will be enabled. Disabling it requires account authorization; unauthorized requests are always checked, and images flagged as unsafe are returned as black images.	default: true
num_inference_steps	integer	The number of inference steps to perform.	1 ≤ n ≤ 12 · default: 4
output_format	enum	The format of the generated image.	jpeg \| png · default: "png"
num_images	integer	The number of images to generate.	1 ≤ n ≤ 4 · default: 1
sync_mode	boolean	If `True`, the media will be returned as a data URI and the output data won't be available in the request history.	default: false
image_size	ImageSize \| enum	The size of the generated image.	default: "landscape_4_3"

Types

1 $defs

ImageSizeobject

height	integer	The height of the generated image.	0 < n ≤ 14142 · default: 512
width	integer	The width of the generated image.	0 < n ≤ 14142 · default: 512

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"rundiffusion-fal/juggernaut-flux/lightning","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}