seedream-5.5-pro

Use seedream-5-5-pro with the synchronous image generation endpoint. Choose a tab for text-to-image generation, reference-image editing, or transparent image output.

To request transparent output, set background to transparent and output_format to png. A request without background: "transparent" returns an opaque image.

Text to image
Image editing
Transparent background

Create an image

POST /v1/images/generations

cURL

curl --request POST \
  --url https://www.anyfast.ai/v1/images/generations \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "seedream-5-5-pro",
    "prompt": "A lifelike editorial photograph of a ceramic teapot on a wooden table, soft morning window light, fine glaze and wood textures",
    "size": "1K",
    "response_format": "url",
    "output_format": "png",
    "watermark": false
  }'

string

required

Use seedream-5-5-pro.

string

required

Text prompt for image generation. Describe the subject, composition, style, lighting, materials, and any text to render.

string

Accepts 1K, 1.5K, and 2K. The example uses 1K, which returned 1248x832.

string

Return the generated image as a URL or Base64 data.

string

Use png or jpeg. Both formats were accepted. Use png when you need an alpha channel.

boolean

Whether to add an AI-generated watermark.

Create response

200

{
  "model": "dola-seedream-5-5-261028",
  "created": 1794382953,
  "data": [
    {
      "url": "https://example.com/generated-image.png",
      "size": "1248x832",
      "output_format": "png",
      "background": "opaque"
    }
  ],
  "usage": {
    "input_images": 0,
    "generated_images": 1,
    "output_tokens": 4056,
    "total_tokens": 4056
  }
}

Edit an image

POST /v1/images/generations

cURL

curl --request POST \
  --url https://www.anyfast.ai/v1/images/generations \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "seedream-5-5-pro",
    "prompt": "Change the blue scarf to forest green. Preserve the subject, pose, background, lighting, and all other details.",
    "image": "https://example.com/source-image.png",
    "size": "1K",
    "response_format": "url",
    "output_format": "png",
    "watermark": false
  }'

string

required

Use seedream-5-5-pro.

string

required

Editing instruction. Specify the requested change and the details that should remain unchanged.

string

required

Source image URL for editing.

string

Accepts 1K, 1.5K, and 2K. The example uses 1K, which returned 1248x832.

string

Return the generated image as a URL or Base64 data.

string

Use png or jpeg. Both formats were accepted. Use png when you need an alpha channel.

boolean

Whether to add an AI-generated watermark.

To continue a multi-turn edit, pass the latest output image as the next request’s image and describe the next focused change.

Create response

200

{
  "model": "dola-seedream-5-5-261028",
  "created": 1794383042,
  "data": [
    {
      "url": "https://example.com/edited-image.png",
      "size": "1248x832",
      "output_format": "png",
      "background": "opaque"
    }
  ],
  "usage": {
    "input_images": 1,
    "generated_images": 1,
    "output_tokens": 4056,
    "total_tokens": 4056
  }
}

Generate a transparent image

POST /v1/images/generations

cURL

curl --request POST \
  --url https://www.anyfast.ai/v1/images/generations \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "seedream-5-5-pro",
    "prompt": "A detailed snowy owl in flight, isolated asset, transparent background outside the owl, preserve fine feather edges",
    "size": "1K",
    "response_format": "url",
    "output_format": "png",
    "background": "transparent",
    "watermark": false
  }'

string

required

Use seedream-5-5-pro.

string

required

Describe the image and request a transparent background outside the subject.

string

Accepts 1K, 1.5K, and 2K. The example uses 1K, which returned 1248x832.

string

Return the generated image as a URL or Base64 data.

string

required

Use png to retain the full and partial transparency in the RGBA output.

string

required

Set to transparent for transparent RGBA output. The response reports opaque or transparent.

Create response

200

{
  "model": "dola-seedream-5-5-261028",
  "created": 1794383006,
  "data": [
    {
      "url": "https://example.com/transparent-image.png",
      "size": "1248x832",
      "output_format": "png",
      "background": "transparent"
    }
  ],
  "usage": {
    "input_images": 0,
    "generated_images": 1,
    "output_tokens": 4056,
    "total_tokens": 4056
  }
}

Headers

string

required

Bearer authentication. Use Bearer YOUR_API_KEY.

string

default:"application/json"

required

Request body format.

Response fields

string

Model identifier reported in the response. This request returned dola-seedream-5-5-261028.

integer

Creation time as a Unix timestamp in seconds.

object[]

Generated image results.

string

Temporary image URL when response_format is url.

string

Base64 image data when response_format is b64_json.

string

Generated image dimensions.

string

Generated image format.

string

Background mode reported for the generated image: opaque or transparent.

integer

Number of generated images.

integer

Number of input images, when applicable.

integer

Output token count.

integer

Total token count.

Error responses

Error responses use an error object with code, message, and type fields.

object

Error information.

string

Machine-readable error code.

string

Human-readable error message.

string

Error category.

Invalid request or unsupported parameter value.

{ "error": { "code": "invalid_request_error", "message": "Invalid request parameter", "type": "invalid_request_error" } }

Missing or invalid API key.

{ "error": { "code": "unauthorized", "message": "Invalid API key", "type": "authentication_error" } }

Rate limit exceeded.

{ "error": { "code": "rate_limit_exceeded", "message": "Rate limit exceeded", "type": "rate_limit_error" } }

Overview

Native Compatible Endpoints

Model APIs

seedream-5.5-pro

Create an image

Create response

Edit an image

Create response

Generate a transparent image

Create response

Headers

Response fields

Error responses

​Create an image

​Create response

​Edit an image

​Create response

​Generate a transparent image

​Create response

​Headers

​Response fields

​Error responses

Create an image

Create response

Edit an image

Create response

Generate a transparent image

Create response

Headers

Response fields

Error responses