GET

/v1/schemas/bfl/image/v1/flux-2-klein-9b-preview

Accept:

kind inputactivity imagehash 609d0df2…extracted Oct 22, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. upstream-spec Source trace `ea458c661ef8b0e03d72ee6b29267451f5a04ae65f35e55ea8a87e53645ef670` { "fetchedAt": 1792645846, "extractorVersion": "1", "verifiedAt": null }

Request body

13 properties · 1 required · 1 $defs

property	type	description	constraints
prompt*	string	Text prompt for image generation.
user	string	Opaque identifier for the end user supplied by the calling platform.	length ≥ 1 · length ≤ 256 · nullable
input_image	string	Path to the input image.	nullable
input_image_2	string	Path to the second input image.	nullable
input_image_3	string	Path to the third input image.	nullable
input_image_4	string	Path to the fourth input image.	nullable
seed	integer	Optional seed for reproducibility.	nullable
width	integer	Width of the image	n ≥ 64 · nullable
height	integer	Height of the image	n ≥ 64 · nullable
safety_tolerance	integer	Harm moderation tolerance from 0 to 7, with 0 the strictest. The route and organization determine the approved maximum and per-category ceilings. Unapproved levels return 422 with approved levels.	0 ≤ n ≤ 7 · default: 2
output_format	enum		jpeg \| png \| webp · nullable
webhook_url	string	URL to receive webhook notifications	length ≥ 1 · length ≤ 2083 · format: uri · nullable
webhook_secret	string	Optional secret for webhook signature verification	nullable

Types

1 $defs

OutputFormatenum

jpeg | png | webp

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"bfl","endpointId":"v1/flux-2-klein-9b-preview","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}