GET

/v1/schemas/fal/image/fal-ai/flux-subject?kind=output

kind outputactivity imagehash d996bfb4…extracted Jul 6, 2026version currentsource upstream spec ↗
fieldrecorded source
schemaSource linked above.
Source trace
fe777d7f84c873b7b85d1ef9ea9ab308a5689d9a07f3de2427aa94a1c35d3c8a
{
  "fetchedAt": 1783331098,
  "extractorVersion": "1",
  "verifiedAt": null
}

Response body

5 properties · 5 required · 1 $defs
propertytypedescriptionconstraints
prompt*stringThe prompt used for generating the image.
timings*object
seed*integerSeed of the generated Image. It will be the same value of the one passed in the input or the randomly generated that was used in case none was passed.
has_nsfw_concepts*boolean[]Whether the generated images contain NSFW concepts.
images*Image[]The generated image files info.

Types

1 $defs

Imageobject

height*integer
content_typestringnullable
url*string
width*integer

Validate a payload

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