curl --request POST \
  --url https://api.modellix.ai/api/v1/kling/kling-v2.1-master-i2v \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "image": "https://example.com/night-city.jpg"
}
'

{
  "code": 0,
  "message": "success",
  "data": {
    "status": "pending",
    "task_id": "task-i2v006",
    "model_id": "model-123",
    "get_result": {
      "method": "GET",
      "url": "https://api.modellix.ai/api/v1/tasks/task-i2v006"
    }
  }
}

{
  "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 V2.1 Master I2V

[Core Function] Kling V2.1 Master I2V is an older generation image-to-video model. [Strengths] Offered improved multi-subject tracking and better texture details over V1. Maintained for backward compatibility. [Best For] Existing legacy integrations and workflows that strictly depend on this specific model version’s quirks. [Limitations] Do NOT use this for new creations. It is a legacy model maintained for backward compatibility. [Routing] Only use if explicitly requested; otherwise use Kling V3 I2V.

POST

/

kling

/

kling-v2.1-master-i2v

curl --request POST \
  --url https://api.modellix.ai/api/v1/kling/kling-v2.1-master-i2v \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "image": "https://example.com/night-city.jpg"
}
'

{
  "code": 0,
  "message": "success",
  "data": {
    "status": "pending",
    "task_id": "task-i2v006",
    "model_id": "model-123",
    "get_result": {
      "method": "GET",
      "url": "https://api.modellix.ai/api/v1/tasks/task-i2v006"
    }
  }
}

{
  "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

image

string

required

Starting frame image URL or Base64

Example:

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

prompt

string

Video generation prompt

Required string length: 1 - 2500

Example:

"Bustling night city with neon lights"

image_tail

string

Ending frame image URL or Base64

Example:

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

negative_prompt

string

Negative prompt

Required string length: 1 - 2500

Example:

"daytime, bright"

mode

enum<string>

default:std

Generation mode: std or pro

Available options:

std,

pro

Example:

"pro"

duration

enum<integer>

default:5

Video duration in seconds

Available options:

5,

10

Example:

10

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 v2 1 i2v Kling v2 1 master t2v