Seedream3.0 - Text to Image

Endpoint

POST /images/generations

Full URL: https://modelfold.ai/v1/images/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 bytedance/seedream for this endpoint Default："bytedance/seedream"。 Allowed values：bytedance/seedream。 Example：bytedance/seedream。
prompt	string	Yes	Prompt required by the ModelFold gateway; at most 2000 characters. The text prompt used to generate the image (Max length: 5000 characters) maxLength: 2000. Example：A 2D flat art style campsite poster with the text “ModelFold AI Seedream 3.0 API”. The scene includes mountains, brown tents under a sunny sky, a rabbit, a deer, some birds, green grass, and a flowing river, all illustrated in clean vector art.。
image_size	string	No	Output size preset. One of square, square_hd, portrait_4_3, portrait_16_9, landscape_4_3, landscape_16_9. Default："square_hd"。 Allowed values：square / square_hd / portrait_4_3 / portrait_16_9 / landscape_4_3 / landscape_16_9。 Example：square_hd。
guidance_scale	number	No	Controls how closely the output image aligns with the input prompt. Higher values mean stronger prompt correlation. (Min: 1, Max: 10, Step: 0.1) (step: 0.1) Default：2.5。 minimum: 1. maximum: 10. Example：2.5。
seed	integer	No	Random seed to control the stochasticity of image generation.

Request Example

curl -X POST "https://modelfold.ai/v1/images/generations" \
  -H "Authorization: Bearer $MODELFOLD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "bytedance/seedream",
  "prompt": "A 2D flat art style campsite poster with the text “ModelFold AI Seedream 3.0 API”. The scene includes mountains, brown tents under a sunny sky, a rabbit, a deer, some birds, green grass, and a flowing river, all illustrated in clean vector art.",
  "image_size": "square_hd",
  "guidance_scale": 2.5
}'

{
  "model": "bytedance/seedream",
  "prompt": "A 2D flat art style campsite poster with the text “ModelFold AI Seedream 3.0 API”. The scene includes mountains, brown tents under a sunny sky, a rabbit, a deer, some birds, green grass, and a flowing river, all illustrated in clean vector art.",
  "image_size": "square_hd",
  "guidance_scale": 2.5
}

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.png"
    }
  ],
  "usage": {}
}