Routescope APIRoutescope API

doubao-seedream-3-0-t2i-250415

doubao-seedream-3-0-t2i-250415 Image Generation API

Supports Chinese and English text-to-image generation, suitable for general illustrations, product visuals, poster drafts, and concept art.

POST
/v1/images/generations
curl -X POST "https://api.routescope.ai/v1/images/generations" \  -H "Content-Type: application/json" \  -d '{    "model": "doubao-seedream-3-0-t2i-250415",    "prompt": "The ability to describe this API gateway in plain Chinese."  }'
{
  "created": 1,
  "data": {}
}

Authorization

BearerAuth

AuthorizationBearer <token>

Model relay interface recognition. Request heading: Autoration: Bearer .

In: header

Request Body

application/json

model*string

Picture model name.

Default"doubao-seedream-3-0-t2i-250415"
prompt*string

Inverted words. Range: 1 to 200000 characters, with a specific upper limit based on the model official interface.

n?integer

Returns the number of pictures. Creates the number of candidates. Scope: 1 to 10; specific ceilings are based on the model official interface.

Range1 <= value <= 10
logo_add?integer

Watermark switch: 0 means no watermark, 1 means with watermark; omitted defaults to with watermark.

Default1
Value in0 | 1
size?string

Generates dimensions, such as FD_PROTEC_0.

quality?string

Generates a quality slot.

style?string

Generates style.

response_format?string

Picture returns format, e. g. FD_PROTEC_0 or FD_PROTEC_1__.

user?string

End-user identification.

Response Body

application/json

Request Parameters

FieldTypeRequiredDefaultDescription
modelstringYesNoneFixed to doubao-seedream-3-0-t2i-250415.
promptstringYesNonePositive prompt. Keep it within about 300 Chinese characters or 600 English words.
nintegerNo1Number of returned images. The gateway commonly supports 1 to 10, but actual limits depend on the upstream provider.
sizestringNo1024x1024Output size, for example 1024x1024.
guidance_scalenumberNo2.5Prompt consistency weight. Supported by Seedream 3.0 with a range of 1 to 10.
response_formatstringNourlResponse format. Supports url or b64_json.
watermarkbooleanNotrueWhether to add an AI-generated watermark.
streambooleanNofalseWhether to enable streaming output.
userstringNoNoneEnd-user identifier for auditing and rate limiting.

Example Code

curl https://api.routescope.ai/v1/images/generations \
  -H "Authorization: Bearer $ROUTESCOPE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seedream-3-0-t2i-250415",
    "prompt": "A minimalist tech-style API documentation cover with a blue-and-white palette and generous negative space.",
    "size": "1024x1024",
    "guidance_scale": 3,
    "response_format": "url"
  }'
import requests

response = requests.post(
    "https://api.routescope.ai/v1/images/generations",
    headers={"Authorization": "Bearer YOUR_ROUTESCOPE_API_KEY"},
    json={
        "model": "doubao-seedream-3-0-t2i-250415",
        "prompt": "A minimalist tech-style API documentation cover with a blue-and-white palette and generous negative space.",
        "size": "1024x1024",
        "guidance_scale": 3,
        "response_format": "url",
    },
)
print(response.json())
const response = await fetch("https://api.routescope.ai/v1/images/generations", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.ROUTESCOPE_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "doubao-seedream-3-0-t2i-250415",
    prompt: "A minimalist tech-style API documentation cover with a blue-and-white palette and generous negative space.",
    size: "1024x1024",
    guidance_scale: 3,
    response_format: "url",
  }),
});
console.log(await response.json());

Response Example

{
  "created": 1777432320,
  "data": [
    {
      "url": "https://api.routescope.ai/assets/images/example.png",
      "b64_json": null,
      "revised_prompt": "Minimalist tech-style API documentation cover, blue-and-white palette, clean whitespace."
    }
  ]
}

Notes

Billing follows the model and channel ratio configured in the Routescope console. guidance_scale is valid for Seedream 3.0; do not continue sending this field when migrating to Seedream 4.0 or later.

Last updated on