Seedream5.5 - Text to Image

This reference documents the ModelFold gateway.

Endpoint

POST /images/generations

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

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

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 seedream/5-5-text-to-image for this endpoint Default："seedream/5-5-text-to-image"。 Allowed values：seedream/5-5-text-to-image。 Example：seedream/5-5-text-to-image。
prompt	string	Yes	Prompt required by the ModelFold gateway; at most 5000 characters. Required. Text prompt, 5–5000 characters. minLength: 5. maxLength: 5000. Example：A premium skincare e-commerce hero image: a glass serum bottle on a pure white display stand under soft light, commercial photorealistic photography。
aspect_ratio	string	Yes	Required. Aspect ratio of the output image. Allowed values：1:1 / 4:3 / 3:4 / 16:9 / 9:16 / 2:3 / 3:2 / 21:9。 Example：1:1。
size	string	No	Output size: 1K, 1.5K or 2K. Default 2K. If omitted, the gateway sends 2K.
output_format	string	No	Output image format. Defaults to png. Default："png"。 Allowed values：png / jpeg。 Example：png。
background	string	No	Background of the output image. Defaults to auto. - auto: decided by the model - transparent: transparent background - opaque: opaque background transparent is available only when output_format is png. Default："auto"。 Allowed values：auto / transparent / opaque。 Example：auto。
nsfw_checker	boolean	No	Defaults to false. When false, no additional content filtering is applied and results are returned directly by the model.

Request Example

curl -X POST "https://modelfold.ai/v1/images/generations" \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "seedream/5-5-text-to-image",
  "prompt": "A premium skincare e-commerce hero image: a glass serum bottle on a pure white display stand under soft light, commercial photorealistic photography",
  "aspect_ratio": "1:1",
  "size": "1K",
  "output_format": "png",
  "background": "auto"
}'

{
  "model": "seedream/5-5-text-to-image",
  "prompt": "A premium skincare e-commerce hero image: a glass serum bottle on a pure white display stand under soft light, commercial photorealistic photography",
  "aspect_ratio": "1:1",
  "size": "1K",
  "output_format": "png",
  "background": "auto"
}

Response

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