GET

/v1/schemas/fal/video/fal-ai/pixverse/v4/text-to-video/fast

Accept:

kind inputactivity videohash 765b986d…extracted Oct 9, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. upstream-spec Source trace `7a3e5af9b69feb60ee1ac46474ec1c0fe0957546c6fbf15aee92cda896c64735` { "fetchedAt": 1791522002, "extractorVersion": "1", "verifiedAt": null }

Request body

7 properties · 1 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.
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
enable_safety_checker	boolean	Authorized callers may set false to request relaxed screening.	default: true
aspect_ratio	enum	The aspect ratio of the generated video	16:9 \| 4:3 \| 1:1 \| 3:4 \| 9:16 · default: "16:9"
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: ""
style	enum	The style of the generated video	anime \| 3d_animation \| clay \| comic \| cyberpunk · nullable

Validate a payload

before you spend tokens

shell

$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"fal-ai/pixverse/v4/text-to-video/fast","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}