GET

/v1/schemas/fal/image/fal-ai%2Fflux-2%2Fklein%2F4b%2Fbase?kind=output

kind outputactivity imagehash a593068a…extracted Jul 6, 2026version currentsource upstream spec ↗

Response body

5 properties · 5 required · 1 $defs
propertytypedescriptionconstraints
images*ImageFile[]The generated images
timings*object
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.
has_nsfw_concepts*boolean[]Whether the generated images contain NSFW concepts.

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/base","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}