GET

/v1/schemas/fal/image/fal-ai/flux/dev

kind inputactivity imagehash cee36037…extracted Aug 19, 2026version currentsource upstream spec ↗
fieldrecorded source
schemaSource linked above.

upstream-spec

Source trace
63d0fd81314f86c0c9a117b73034347b7d3c394f76799165b2ef02ff092f6ffa
{
  "fetchedAt": 1787115649,
  "extractorVersion": "1",
  "verifiedAt": null
}

Request body

10 properties · 1 required · 1 $defs
propertytypedescriptionconstraints
prompt*stringThe prompt to generate an image from.
accelerationenumThe speed of the generation. The higher the speed, the faster the generation.none | regular | high · default: "none"
enable_safety_checkerbooleanIf 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
sync_modebooleanIf `True`, the media will be returned as a data URI and the output data won't be available in the request history.default: false
num_imagesintegerThe number of images to generate.1 ≤ n ≤ 4 · default: 1
image_sizeImageSize | enumThe size of the generated image.default: "landscape_4_3"
num_inference_stepsintegerThe number of inference steps to perform.1 ≤ n ≤ 50 · default: 28
guidance_scalenumberThe CFG (Classifier Free 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.1 ≤ n ≤ 20 · default: 3.5
seedinteger The same seed and the same prompt given to the same version of the model will output the same image every time. nullable
output_formatenumThe format of the generated image.jpeg | png · default: "jpeg"

Types

1 $defs

ImageSizeobject

heightintegerThe height of the generated image.0 < n ≤ 14142 · default: 512
widthintegerThe 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/dev","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}