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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-custom-element", "model_params": { "element_name": "My Character", "element_description": "A young male character with short hair, wearing a white T-shirt", "reference_type": "image_refer", "element_image_list": { "frontal_image": "https://example.com/front.jpg", "refer_images": [ { "image_url": "https://example.com/side.jpg" } ] } } } '
{
  "created": 1757169743,
  "id": "task-unified-1757169743-8dxnm6yz",
  "model": "kling-custom-element",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 600
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_call",
    "credits_reserved": 1,
    "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-custom-element
required

Model name

Available options:
kling-custom-element
Example:

"kling-custom-element"

​
model_params
object
required

Model parameters

​
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

Subject element creation task submitted successfully

​
created
integer

Task creation timestamp

Example:

1757169743

​
id
string

Task ID

Example:

"task-unified-1757169743-8dxnm6yz"

​
model
string

Actual model name used

Example:

"kling-custom-element"

​
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

Task details

​
type
enum<string>

Task output type

Available options:
video
Example:

"video"

​
usage
object

Usage and billing information