Seedream 5.0 Pro Image Generation API

Capabilities

Seedream 5.0 Pro supports text-to-image and image-to-image generation using the OpenAI Images API-compatible format. The model code is doubao-seedream-5-0-pro.

Endpoints and Authentication

Base URL: https://api.88api.ai

Authorization: Bearer $API_KEY
Content-Type: application/json

Use case	Method	Endpoint
Text-to-image	`POST`	`/v1/images/generations`
Editing with public reference images	`POST`	`/v1/images/generations`
Editing a local image	`POST`	`/v1/images/edits`

Text-to-Image

curl https://api.88api.ai/v1/images/generations \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seedream-5-0-pro",
    "prompt": "A little Shiba Inu wearing a red Tang suit, Chinese guochao illustration style, festive and cozy",
    "n": 1,
    "size": "1K",
    "quality": "1K",
    "response_format": "url"
  }'

Image-to-Image

Public Reference Images

Use image for a single reference image and images for multiple reference images. Reference images must be public HTTP(S) URLs, with a combined maximum of 14 images.

curl https://api.88api.ai/v1/images/generations \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seedream-5-0-pro",
    "prompt": "Keep the person and the composition, change the outfit to a blue outdoor jacket",
    "image": "https://example.com/reference.jpg",
    "size": "2K",
    "quality": "2K",
    "response_format": "url"
  }'

Example with multiple reference images:

{
  "model": "doubao-seedream-5-0-pro",
  "prompt": "Blend the subjects and colors from the reference images",
  "images": [
    "https://example.com/reference-1.jpg",
    "https://example.com/reference-2.jpg"
  ],
  "size": "2K",
  "quality": "2K"
}

Local Images

Local images are sent as a multipart request, one image per upload:

curl https://api.88api.ai/v1/images/edits \
  -H "Authorization: Bearer $API_KEY" \
  -F "model=doubao-seedream-5-0-pro" \
  -F "prompt=Change the background to a light-colored photo studio" \
  -F "image=@reference.png" \
  -F "size=2K" \
  -F "quality=2K" \
  -F "response_format=url"

Request Parameters

Parameter	Type	Required	Default	Description
`model`	string	Yes	—	`doubao-seedream-5-0-pro`
`prompt`	string	Yes	—	Text-to-image description or image-to-image editing instruction
`n`	integer	No	`1`	`1` to `4`
`size`	string	No	—	`1K` or `2K`
`quality`	string	No	—	`1K` or `2K`
`response_format`	string	No	`url`	`url` or `b64_json`
`image`	string / file	No	—	A single public reference image URL, or the uploaded file on the edits endpoint
`images`	array[string]	No	—	Array of public reference image URLs, up to 14

Response Format

{
  "created": 1760000000,
  "data": [
    {
      "url": "https://..."
    }
  ],
  "model": "doubao-seedream-5-0-pro"
}

When response_format is url, read data[].url; when it is b64_json, read data[].b64_json.