HappyHorse - text-to-video

Endpoint

POST /videos/generations

Full URL: https://modelfold.ai/v1/videos/generations

Authentication: every request must include the Authorization: Bearer <API_KEY> header.

Send model parameters directly in the JSON body. Do not wrap them in input. This request waits for generation to finish and returns data[].url; supported media models also offer async jobs, polling and callbacks. Replace example media URLs with your own publicly accessible files. See API gateway for billing and errors.

Input parameters for the generation task

Request Parameters

Body (application/json)

Parameter	Type	Required	Description
model	string	Yes	The model name to use for generation. Required field. - Must be happyhorse/text-to-video for this endpoint Default："happyhorse/text-to-video"。 Allowed values：happyhorse/text-to-video。 Example：happyhorse/text-to-video。
prompt	string	Yes	Prompt required by the ModelFold gateway; at most 2000 characters. Text prompt describing the video to generate (any language). Up to 5,000 characters. maxLength: 2000. Example：A miniature city built from cardboard and bottle caps comes to life at night. A cardboard train slowly passes through, with small lights dotting the scene and illuminating the way ahead.。
resolution	string	No	Output video resolution: 720p or 1080p (default). Default："1080p"。 Allowed values：720p / 1080p。 Example：1080p。
aspect_ratio	string	No	Output aspect ratio. Valid values: 16:9 (default), 9:16, 1:1, 4:3, 3:4. Default："16:9"。 Allowed values：16:9 / 9:16 / 1:1 / 4:3 / 3:4。 Example：16:9。
duration	integer	No	Output duration in seconds (integer). Must be between 3 and 15. Defaults to 5. Default：5。 minimum: 3. maximum: 15. Example：5。
seed	integer	No	Random seed for reproducibility. Default：0。 minimum: 0. maximum: 2147483647. Example：0。

Request Example

curl -X POST "https://modelfold.ai/v1/videos/generations" \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "happyhorse/text-to-video",
  "prompt": "A miniature city built from cardboard and bottle caps comes to life at night. A cardboard train slowly passes through, with small lights dotting the scene and illuminating the way ahead.",
  "resolution": "1080p",
  "aspect_ratio": "16:9",
  "duration": 5,
  "seed": 0
}'

{
  "model": "happyhorse/text-to-video",
  "prompt": "A miniature city built from cardboard and bottle caps comes to life at night. A cardboard train slowly passes through, with small lights dotting the scene and illuminating the way ahead.",
  "resolution": "1080p",
  "aspect_ratio": "16:9",
  "duration": 5,
  "seed": 0
}

Response

200 — Generation completed. usage contains actual billing details; result URLs are illustrative.

{
  "ok": true,
  "created": 1792134000,
  "data": [
    {
      "url": "https://modelfold.ai/uploads/outputs/result.mp4"
    }
  ],
  "usage": {}
}