Skip to main content
POST
/
v1
/
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"
  }
}

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

​
id
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

​
type
enum<string>

Task output type

Available options:
text,
image,
audio,
video
Example:

"video"

​
usage
object

Usage and billing information