GET

/v1/schemas/fal/video/heygen/heygen-video/text-to-video

kind inputactivity videohash c20e5d1c…extracted Nov 10, 2026version currentsource upstream spec ↗
fieldrecorded source
schemaSource linked above.

upstream-spec

Source trace
abd49c8ced8833325d751c36463fe41bc835326612dbaac03c06355d5ef558bb
{
  "fetchedAt": 1794286801,
  "extractorVersion": "2",
  "verifiedAt": null
}

Request body

7 properties · 1 required · 0 $defs
propertytypedescriptionconstraints
prompt*stringlength ≥ 1 · length ≤ 32000
resolutionenum480p | 768p | 1080p | 2k · default: "768p"
seedinteger0 ≤ n ≤ 4294967295 · nullable
aspect_ratioenum21:9 | 16:9 | 4:3 | 1:1 | 3:4 | 9:16 · default: "16:9"
durationinteger5 ≤ n ≤ 15 · default: 5
prompt_enhancementenumturbo | quality | ultraquality | disabled · default: "turbo"
enable_safety_checkerbooleanAuthorized callers may set false to request relaxed screening.default: true

Validate a payload

before you spend tokens
shell
$ curl -X POST https://modelschemas.com/v1/validate \
    -d '{"provider":"fal","endpointId":"heygen/heygen-video/text-to-video","payload":{…}}'
→ {"valid": false, "errors": [{"path": "#", "keyword": "required", …}]}