GET

/v1/schemas/fal/image/fal-ai/flux-2/klein/4b

kind inputactivity imagehash a5cd6ecd…extracted Aug 8, 2026version currentsource upstream spec ↗
fieldrecorded source
schemaSource linked above.
Source trace
6729b9bb7f9b5afb0ec4ba673ac612afb06aa8f20eab1ca325db51597e670fad
{
  "fetchedAt": 1786165357,
  "extractorVersion": "1",
  "verifiedAt": null
}

Request body

8 properties · 1 required · 1 $defs
propertytypedescriptionconstraints
prompt*stringThe prompt to generate an image from.
num_imagesintegerThe number of images to generate.1 ≤ n ≤ 4 · default: 1
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
num_inference_stepsintegerThe number of inference steps to perform.4 ≤ n ≤ 8 · default: 4
sync_modebooleanIf `True`, the media will be returned as a data URI. Output is not stored when this is True.default: false
image_sizeImageSize | enumThe size of the image to generate.default: "landscape_4_3"
seedintegerThe seed to use for the generation. If not provided, a random seed will be used.nullable
output_formatenumThe format of the generated image.jpeg | png | webp · default: "png"

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-2/klein/4b","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}