curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "kling-o3-video-edit",
  "prompt": "Adjust the color to warm tones and add a cinematic feel",
  "video_url": "https://example.com/original.mp4",
  "quality": "720p",
  "keep_original_sound": true
}
'

{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "kling-o3-video-edit",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 300,
    "video_duration": 9
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_call",
    "credits_reserved": 7,
    "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-o3-video-edit",
    "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-O3

Kling-O3 Video Edit

Kling-O3 Video Edit (kling-o3-video-edit) edits and modifies the original video, based on the Kling AI kling-v3-omni model
Output video duration and aspect ratio remain consistent with the input video
Supports editing with text instructions, reference images, and elements
Sound generation is not supported when video input is provided (sound is forced off)
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-o3-video-edit",
  "prompt": "Adjust the color to warm tones and add a cinematic feel",
  "video_url": "https://example.com/original.mp4",
  "quality": "720p",
  "keep_original_sound": true
}
'

{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "kling-o3-video-edit",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 300,
    "video_duration": 9
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_call",
    "credits_reserved": 7,
    "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-o3-video-edit",
    "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-o3-video-edit

required

Video generation model name

Available options:

kling-o3-video-edit

Example:

"kling-o3-video-edit"

prompt

string

Edit instruction, max 2500 characters

Reference syntax: You can reference elements, images, and videos in the prompt using <<<xxx>>> syntax, for example: Replace the person in the video with <<<element_1>>>

Maximum string length: 2500

Example:

"Adjust the color to warm tones and add a cinematic feel"

video_url

string<uri>

Video URL to edit

Video format requirements:

Format: MP4 / MOV
Size: <= 200MB
Duration: >= 3 seconds
Dimensions: width and height 720px ~ 2160px
Frame rate: 24fps ~ 60fps

Constraints:

First/last frame not supported
Reference image count + element count <= 4 when video is provided
Video character elements not supported (only multi-image elements supported)
Video URL must be directly accessible by the server

Example:

"https://example.com/original.mp4"

keep_original_sound

boolean

default:true

Whether to keep original video sound

Note:

true: Keep the original video sound (default)
false: Do not keep the original video sound

Example:

true

image_urls

string<uri>[]

Reference image URL array (style reference)

Constraint: Reference image count + element count <= 4 when video is provided

Note:

Image URLs must be directly accessible by the server or trigger a direct download when accessed

Example:

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

quality

enum<string>

default:720p

Resolution quality

Options:

720p: Standard 720P
1080p: High quality 1080P

Billing: Base unit price 81,000 UC/second x input video duration (rounded up). 1080p multiplier 1.334

Available options:

720p,

1080p

Example:

"720p"

model_params

object

Advanced parameters

Show child attributes

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-o3-video-edit"

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

Image Series

Video Series

Audio Series

Text Series

Account Management

Task Management

File Management

Kling-O3 Video Edit

Authorizations

All APIs require Bearer Token authentication

Body

Response