curl --request POST \
  --url https://api.modellix.ai/api/v1/kling/kling-image-expansion \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "image": "https://example.com/city-center.jpg",
  "up_expansion_ratio": 0,
  "down_expansion_ratio": 0,
  "left_expansion_ratio": 1,
  "right_expansion_ratio": 1
}
'

{
  "code": 0,
  "message": "success",
  "data": {
    "status": "pending",
    "task_id": "task-expansion-xyz789",
    "model_id": "model-123",
    "get_result": {
      "method": "GET",
      "url": "https://api.modellix.ai/api/v1/tasks/task-expansion-xyz789"
    }
  }
}

{
  "code": 400,
  "message": "Invalid parameters: parameter 'image' is required"
}

{
  "code": 401,
  "message": "Authentication failed: invalid API key"
}

{
  "code": 429,
  "message": "Rate limit exceeded: 100 requests per minute, retry after 60 seconds"
}

{
  "code": 500,
  "message": "Internal server error"
}

Kling Image Expansion

[Core Function] Kling Image Expansion is an outpainting model. [Strengths] It intelligently extends the borders of an image (horizontal, vertical, or asymmetric) while matching the original style and context. [Best For] Highly recommended for: changing aspect ratios, extending landscapes, and filling out cropped photos. [Limitations] Do NOT use this model for inpainting or style transfer. [Routing] Use this specifically when the user asks to ‘expand’, ‘extend’, or ‘uncrop’ an image.

POST

kling

kling-image-expansion

curl --request POST \
  --url https://api.modellix.ai/api/v1/kling/kling-image-expansion \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "image": "https://example.com/city-center.jpg",
  "up_expansion_ratio": 0,
  "down_expansion_ratio": 0,
  "left_expansion_ratio": 1,
  "right_expansion_ratio": 1
}
'

{
  "code": 0,
  "message": "success",
  "data": {
    "status": "pending",
    "task_id": "task-expansion-xyz789",
    "model_id": "model-123",
    "get_result": {
      "method": "GET",
      "url": "https://api.modellix.ai/api/v1/tasks/task-expansion-xyz789"
    }
  }
}

{
  "code": 400,
  "message": "Invalid parameters: parameter 'image' is required"
}

{
  "code": 401,
  "message": "Authentication failed: invalid API key"
}

{
  "code": 429,
  "message": "Rate limit exceeded: 100 requests per minute, retry after 60 seconds"
}

{
  "code": 500,
  "message": "Internal server error"
}

Authorizations

Authorization

string

header

required

API Key authentication. Format: Bearer YOUR_API_KEY.

Body

application/json

Note: All four expansion ratio parameters are required. Set to 0.0 for directions that do not need expansion. This model does NOT support: negative_prompt, aspect_ratio, resolution, image_fidelity, image_reference, or human_fidelity parameters.

image

string

required

Original image (URL or Base64 encoded, do not include 'data:' prefix for Base64). Supported formats: .jpg, .jpeg, .png. Maximum size: 10MB. Minimum dimensions: 300x300px

Minimum string length: 1

Example:

"https://example.com/original.jpg"

up_expansion_ratio

number<float>

required

Upward expansion ratio, based on original image height. Range: 0.0-2.0

Required range: 0 <= x <= 2

Example:

0.5

down_expansion_ratio

number<float>

required

Downward expansion ratio, based on original image height. Range: 0.0-2.0

Required range: 0 <= x <= 2

Example:

0.5

left_expansion_ratio

number<float>

required

Leftward expansion ratio, based on original image width. Range: 0.0-2.0

Required range: 0 <= x <= 2

Example:

0.5

right_expansion_ratio

number<float>

required

Rightward expansion ratio, based on original image width. Range: 0.0-2.0

Required range: 0 <= x <= 2

Example:

0.5

prompt

string

Positive prompt to guide content generation in expanded areas

Maximum string length: 2500

Example:

"Extend with natural landscape elements"

integer

default:1

Number of images to generate per request

Required range: 1 <= x <= 9

Example:

1

Response

Task submitted successfully

code

integer

required

Response code, 0 indicates success

Example:

0

message

string

required

Response message

Example:

"success"

data

object

required

Detailed data about the submitted asynchronous task.

Show child attributes

Kling avatar Kling image o1