GET

/v1/schemas/fal/image/fal-ai/flux-2/klein/4b/base?kind=output

Accept:

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

field	recorded source
schema	Source linked above. Source trace `dba3b4fd64dc49cd040d86c55298c737f5a8ccceccc4d3f9f4c4cefb58021e91` { "fetchedAt": 1783330412, "extractorVersion": "1", "verifiedAt": null }

Response body

5 properties · 5 required · 1 $defs

property	type	description
images*	ImageFile[]	The generated images
timings*	object
prompt*	string	The prompt used for generating the image.
seed*	integer	Seed 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.

Types

1 $defs

ImageFileobject

file_name	string	The name of the file. It will be auto-generated if not provided.	nullable
height	integer	The height of the image	nullable
url*	string	The URL where the file can be downloaded from.
content_type	string	The mime type of the file.	nullable
file_size	integer	The size of the file in bytes.	nullable
width	integer	The width of the image	nullable

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", …}]}