GET

/v1/schemas/fal/image/fal-ai/flux-2/flash

Accept:

kind inputactivity imagehash 989a552c…extracted Aug 8, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `5033815ec7d3c1c0b8322d244949b57fc793e2275161e7adbad3a3f8b2494f04` { "fetchedAt": 1786165357, "extractorVersion": "1", "verifiedAt": null }

Request body

9 properties · 1 required · 1 $defs

property	type	description	constraints
prompt*	string	The prompt to generate an image from.
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
seed	integer	The seed to use for the generation. If not provided, a random seed will be used.	nullable
guidance_scale	number	Guidance Scale is a measure of how close you want the model to stick to your prompt when looking for a related image to show you.	0 ≤ n ≤ 20 · default: 2.5
enable_prompt_expansion	boolean	If set to true, the prompt will be expanded for better results.	default: false
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
image_size	ImageSize \| enum	The size of the image to generate. The width and height must be between 512 and 2048 pixels.	default: "landscape_4_3"
output_format	enum	The format of the generated image.	jpeg \| png \| webp · default: "png"
num_images	integer	The number of images to generate.	1 ≤ n ≤ 4 · default: 1

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":"fal-ai/flux-2/flash","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}