GET

/v1/schemas/fal/image/fal-ai/sdxl-controlnet-union?kind=output

kind outputactivity imagehash d996bfb4…extracted Jul 6, 2026version currentsource upstream spec ↗
fieldrecorded source
schemaSource linked above.
Source trace
9ecac34ad31b94dd7a68cd1e403b15778fc694fcf2223a321e2aea6f819402a4
{
  "fetchedAt": 1783330412,
  "extractorVersion": "1",
  "verifiedAt": null
}

Response body

5 properties · 5 required · 1 $defs
propertytypedescriptionconstraints
prompt*stringThe prompt used for generating the image.
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.
timings*object
has_nsfw_concepts*boolean[]Whether the generated images contain NSFW concepts.
images*Image[]The generated image files info.

Types

1 $defs

Imageobject

width*integer
content_typestringnullable
url*string
height*integer

Validate a payload

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