GET

/v1/schemas/fal/video/fal-ai/kling-video/v1.5/pro/text-to-video

Accept:

kind inputactivity videohash 9ddb872d…extracted Jul 6, 2026version currentsource upstream spec ↗

field	recorded source
schema	Source linked above. Source trace `c9620243cf473df4eb1af3fcd12da1bbd3b1e0bab8b69ffd3633e850c30a0ad2` { "fetchedAt": 1783330412, "extractorVersion": "1", "verifiedAt": null }

Request body

5 properties · 1 required · 0 $defs

property	type	description	constraints
prompt*	string		length ≤ 2500
cfg_scale	number	The CFG (Classifier Free Guidance) scale is a measure of how close you want the model to stick to your prompt.	0 ≤ n ≤ 1 · default: 0.5
duration	enum	The duration of the generated video in seconds	5 \| 10 · default: "5"
aspect_ratio	enum	The aspect ratio of the generated video frame	16:9 \| 9:16 \| 1:1 · default: "16:9"
negative_prompt	string		length ≤ 2500 · default: "blur, distort, and low quality"

Validate a payload

before you spend tokens

shell

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