GET

/v1/schemas/fal/image/fal-ai%2Fflux-pro%2Fv1.1-ultra

kind inputactivity imagehash 61ccf867extracted Jul 6, 2026version currentsource upstream spec ↗

Request body

11 properties · 1 required · 0 $defs
propertytypedescriptionconstraints
prompt*stringThe prompt to generate an image from.
num_imagesintegerThe number of images to generate.1 ≤ n ≤ 4 · default: 1
output_formatenumThe format of the generated image.jpeg | png · default: "jpeg"
safety_toleranceenumThe safety tolerance level for the generated image. 1 being the most strict and 5 being the most permissive.1 | 2 | 3 | 4 | 5 | 6 · default: "2"
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
rawbooleanGenerate less processed, more natural-looking images.default: false
seedinteger The same seed and the same prompt given to the same version of the model will output the same image every time. nullable
image_urlstringThe image URL to generate an image from.nullable
enhance_promptbooleanWhether to enhance the prompt for better results.default: false
image_prompt_strengthnumberThe strength of the image prompt, between 0 and 1.0 ≤ n ≤ 1 · default: 0.1
aspect_ratioenum | stringThe aspect ratio of the generated image.default: "16:9"

Validate a payload

before you spend tokens
shell
$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"fal-ai/flux-pro/v1.1-ultra","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}