curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "kling-v3-turbo-image-to-video",
  "image_start": "https://your-cdn.com/start-frame.jpg",
  "prompt": "A gentle breeze sweeps across the scene, bringing a subtle sense of motion",
  "quality": "720p",
  "duration": 5
}
'

{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "kling-v3-turbo-image-to-video",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 300,
    "video_duration": 5
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_second",
    "credits_reserved": 270000,
    "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-turbo-image-to-video",
    "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-Turbo

Kling-V3-Turbo Image to Video

Kling-V3 Turbo Image to Video (kling-v3-turbo-image-to-video) model supports image-to-video generation
Generates video based on a first-frame image, resolution supports 720P / 1080P (4K not supported), duration 3 ~ 15 seconds
The aspect ratio is determined by the first-frame image, aspect_ratio is not accepted
Asynchronous processing mode, use the returned task ID to query 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-turbo-image-to-video",
  "image_start": "https://your-cdn.com/start-frame.jpg",
  "prompt": "A gentle breeze sweeps across the scene, bringing a subtle sense of motion",
  "quality": "720p",
  "duration": 5
}
'

{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "kling-v3-turbo-image-to-video",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 300,
    "video_duration": 5
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_second",
    "credits_reserved": 270000,
    "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-turbo-image-to-video",
    "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 APIs require Bearer Token authentication

Get API Key:

Visit API Key Management Page to get your API Key

Add to request header:

Authorization: Bearer YOUR_API_KEY

Body

application/json

model

enum<string>

default:kling-v3-turbo-image-to-video

required

Video generation model name

Available options:

kling-v3-turbo-image-to-video

Example:

"kling-v3-turbo-image-to-video"

image_start

string<uri>

required

First-frame image URL, used as the first frame of the video

Image Requirements:

Formats: .jpg / .jpeg / .png
Size: <= 50MB
Dimensions: width and height both >= 300px
Aspect ratio: between 1:2.5 and 2.5:1

The video aspect ratio is determined by the first-frame image

Example:

"https://your-cdn.com/start-frame.jpg"

prompt

string

Text prompt describing the desired motion or changes in the scene (optional)

Maximum string length: 2500

Example:

"A gentle breeze sweeps across the scene, bringing a subtle sense of motion"

quality

enum<string>

default:720p

Resolution tier

Options:

720p: Standard quality
1080p: High quality
4k not supported

Available options:

720p,

1080p

Example:

"720p"

duration

integer

default:5

Video duration in seconds, defaults to 5 seconds

Note:

Range: integer from 3 to 15
Billing is based on the duration value, longer duration costs more

Required range: 3 <= x <= 15

Example:

5

callback_url

string<uri>

HTTPS callback URL for task completion

Callback Timing:

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

Security Restrictions:

HTTPS protocol only
Internal 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
Maximum 3 retries after failure (at 1/2/4 seconds after failure)
Callback response format is consistent with task query API
2xx status code is considered successful, other codes trigger 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-turbo-image-to-video"

object

enum<string>

Task type

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>

Task output type

Available options:

text,

image,

audio,

video

Example:

"video"

usage

object

Usage and billing information

Show child attributes

Kling-V3-Turbo Text to Video Kling-O1 Image to Video

Image Series

Video Series

Audio Series

Text Series

Account Management

Task Management

File Management

Kling-V3-Turbo Image to Video

Authorizations

All APIs require Bearer Token authentication

Body

Response