curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "kling-v3-motion-control",
  "prompt": "A girl dancing gracefully",
  "image_urls": [
    "https://example.com/character.jpg"
  ],
  "video_urls": [
    "https://example.com/dance-reference.mp4"
  ],
  "quality": "720p",
  "model_params": {
    "character_orientation": "image"
  }
}
'

{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "kling-v3-motion-control",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 300,
    "video_duration": 8
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_second",
    "credits_reserved": 408240,
    "user_group": "default"
  }
}

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

{
  "error": {
    "code": "unauthorized",
    "message": "Invalid or expired token",
    "type": "authentication_error"
  }
}

{
  "error": {
    "code": "insufficient_quota",
    "message": "Insufficient quota. Please top up your account.",
    "type": "insufficient_quota"
  }
}

{
  "error": {
    "code": "model_access_denied",
    "message": "Token does not have access to model: kling-v3-motion-control",
    "type": "invalid_request_error"
  }
}

{
  "error": {
    "code": "rate_limit_exceeded",
    "message": "Too many requests, please try again later",
    "type": "rate_limit_error"
  }
}

{
  "error": {
    "code": "internal_error",
    "message": "Internal server error",
    "type": "api_error"
  }
}

Kling-V3

Kling-V3 Motion Control

Kling-V3 Motion Control (kling-v3-motion-control) model supports generating motion-driven videos using reference image + reference video
The system extracts motion trajectories from the reference video and applies them to the character/object in the reference image, generating a new video with motions consistent with the reference video
Video duration depends on character_orientation: image max 10 seconds, video max 30 seconds, minimum 3 seconds
Asynchronous processing mode, use the returned task ID to query task status
Generated video links are valid for 24 hours, please save them promptly

POST

videos

generations

curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "kling-v3-motion-control",
  "prompt": "A girl dancing gracefully",
  "image_urls": [
    "https://example.com/character.jpg"
  ],
  "video_urls": [
    "https://example.com/dance-reference.mp4"
  ],
  "quality": "720p",
  "model_params": {
    "character_orientation": "image"
  }
}
'

{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "kling-v3-motion-control",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 300,
    "video_duration": 8
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_second",
    "credits_reserved": 408240,
    "user_group": "default"
  }
}

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

{
  "error": {
    "code": "unauthorized",
    "message": "Invalid or expired token",
    "type": "authentication_error"
  }
}

{
  "error": {
    "code": "insufficient_quota",
    "message": "Insufficient quota. Please top up your account.",
    "type": "insufficient_quota"
  }
}

{
  "error": {
    "code": "model_access_denied",
    "message": "Token does not have access to model: kling-v3-motion-control",
    "type": "invalid_request_error"
  }
}

{
  "error": {
    "code": "rate_limit_exceeded",
    "message": "Too many requests, please try again later",
    "type": "rate_limit_error"
  }
}

{
  "error": {
    "code": "internal_error",
    "message": "Internal server error",
    "type": "api_error"
  }
}

Authorizations

Authorization

string

header

required

All API endpoints require Bearer Token authentication

Get your API Key:

Visit the API Key Management Page to obtain your API Key

Add the following to your request headers:

Authorization: Bearer YOUR_API_KEY

Body

application/json

model

enum<string>

default:kling-v3-motion-control

required

Video generation model name

Available options:

kling-v3-motion-control

Example:

"kling-v3-motion-control"

image_urls

string<uri>[]

required

Array of reference image URLs, used to provide the appearance source of the character/object

Note:

Provide one reference image
Image size: no larger than 10MB
Supported file formats: .jpg, .jpeg, .png
Image dimensions: width and height ≥ 300px, aspect ratio between 1:2.5 and 2.5:1
Image URL must be directly accessible by the server

Example:

["https://example.com/character.jpg"]

video_urls

string<uri>[]

required

Array of reference video URLs to provide motion trajectory

Note:

Provide one reference video
Video duration: 3 to 30 seconds
Video size: up to 100MB
Video dimensions: width and height between 340px and 3850px
Avoid cuts, fast motion, and scene changes
The video URL must be directly accessible by the server

Example:

["https://example.com/dance-reference.mp4"]

model_params

object

required

Model-specific parameters (required), used for motion control configuration

Show child attributes

prompt

string

Text prompt (optional), used to guide the generated content

Note:

Maximum 2500 characters
Can be left empty; the model will automatically generate based on the reference image and video

Maximum string length: 2500

Example:

"A girl dancing gracefully"

quality

enum<string>

default:720p

Resolution tier

Details:

720p: Standard quality (std)
1080p: High quality (pro)

Available options:

720p,

1080p

Example:

"720p"

callback_url

string<uri>

HTTPS callback URL triggered upon task completion

Callback Timing:

Triggered when the task is completed, failed, or cancelled
Sent after billing confirmation is complete

Security Restrictions:

Only HTTPS protocol is supported
Callbacks to private IP addresses are prohibited (127.0.0.1, 10.x.x.x, 172.16-31.x.x, 192.168.x.x, etc.)
URL length must not exceed 2048 characters

Callback Mechanism:

Timeout: 10 seconds
Up to 3 retries after failure (retries at 1/2/4 seconds after failure)
Callback response body format is consistent with the task query API response
A 2xx status code from the callback URL is considered successful; other status codes will trigger a retry

Example:

"https://your-domain.com/webhooks/video-task-completed"

Response

Video generation task created successfully

created

integer

Task creation timestamp

Example:

1757169743

string

Task ID

Example:

"task-unified-1757169743-7cvnl5zw"

model

string

Actual model name used

Example:

"kling-v3-motion-control"

object

enum<string>

Specific type of the task

Available options:

video.generation.task

progress

integer

Task progress percentage (0-100)

Required range: 0 <= x <= 100

Example:

0

status

enum<string>

Task status

Available options:

pending,

processing,

completed,

failed

Example:

"pending"

task_info

object

Video task details

Show child attributes

type

enum<string>

Output type of the task

Available options:

text,

image,

audio,

video

Example:

"video"

usage

object

Usage and billing information

Show child attributes

Image Series

Video Series

Audio Series

Text Series

Account Management

Task Management

File Management

Kling-V3 Motion Control

Authorizations

All API endpoints require Bearer Token authentication

Body

Response