GET

/v1/schemas/bfl/image/v1/flux-pro-1.1-ultra

Accept:

kind inputactivity imagehash e3b75437…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

12 properties · 0 required · 1 $defs

property	type	description	constraints
user	string	Opaque identifier for the end user supplied by the calling platform.	length ≥ 1 · length ≤ 256 · nullable
prompt	string	The prompt to use for image generation.	nullable
prompt_upsampling	boolean	Whether to perform upsampling on the prompt. If active, automatically modifies the prompt for more creative generation.	default: false
seed	integer	Optional seed for reproducibility. If not provided, a random seed will be used.	nullable
aspect_ratio	string	Aspect ratio of the image between 21:9 and 9:21	default: "16:9"
safety_tolerance	integer	Tolerance level for input and output moderation. Between 0 and 6, 0 being most strict, 6 being least strict.	0 ≤ n ≤ 6 · default: 2
output_format	enum	Output format for the generated image. Can be 'jpeg', 'png', or 'webp'.	jpeg \| png \| webp · nullable
raw	boolean	Generate less processed, more natural-looking images	default: false
image_prompt	string	Optional image to remix in base64 format	nullable
image_prompt_strength	number	Blend between the prompt and the image prompt	0 ≤ n ≤ 1 · default: 0.1
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-pro-1.1-ultra","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}