GET

/v1/schemas/fal/video/fal-ai/pixverse/v3.5/image-to-video/fast

Accept:

kind inputactivity videohash abf46bc6…extracted Oct 9, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. upstream-spec Source trace `b5a4460fc0619d59c7cc491b5f94943d8441f924beab40798226e7cd952d2c85` { "fetchedAt": 1791522002, "extractorVersion": "1", "verifiedAt": null }

Request body

7 properties · 2 required · 0 $defs

property	type	description	constraints
prompt*	string	Text prompt for the video generation. Limited to 2048 UTF-8 encoded bytes. Because the limit counts bytes rather than characters, emoji and non-Latin or accented characters (which use multiple bytes each) can push a visually short prompt over the cap.
image_url*	string	URL of the image to use as the first frame
style	enum	The style of the generated video	anime \| 3d_animation \| clay \| comic \| cyberpunk · nullable
enable_safety_checker	boolean	Authorized callers may set false to request relaxed screening.	default: true
resolution	enum	The resolution of the generated video	360p \| 540p \| 720p · default: "720p"
negative_prompt	string	Negative prompt to be used for the generation. Limited to 2048 UTF-8 encoded bytes. Because the limit counts bytes rather than characters, emoji and non-Latin or accented characters (which use multiple bytes each) can push a visually short prompt over the cap.	default: ""
seed	integer	The same seed and the same prompt given to the same version of the model will output the same video every time.	nullable

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"fal-ai/pixverse/v3.5/image-to-video/fast","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}