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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": "wan2.7-text-to-video",
  "prompt": "A small kitten running under the moonlight",
  "aspect_ratio": "16:9",
  "duration": 5
}
'
{
  "created": 1757169743,
  "id": "task-unified-1757169743-7cvnl5zw",
  "model": "wan2.7-text-to-video",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 120
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_call",
    "credits_reserved": 5,
    "user_group": "default"
  }
}

Authorizations

​
Authorization
string
header
required

All APIs require Bearer Token authentication

Get your API Key:

Visit the API Key management page to obtain your API Key

Add to request headers:

Authorization: Bearer YOUR_API_KEY

Body

application/json
​
model
enum<string>
required

Model name, must be wan2.7-text-to-video

Available options:
wan2.7-text-to-video
Example:

"wan2.7-text-to-video"

​
prompt
string
required

Text prompt for video generation. Supports both Chinese and English; each character/letter counts as 1, with overflow auto-truncated. Maximum length: 5000 characters

Multi-shot narrative: Control shot structure via natural language

  • Single shot: state "generate a single-shot video" in the prompt
  • Multi shot: use "generate a multi-shot video" or timestamped shot lists (e.g. "Shot 1 [0-3s]")
Maximum string length: 5000
Example:

"A small kitten running under the moonlight"

​
negative_prompt
string

Negative prompt describing what should not appear in the video. Supports both Chinese and English. Maximum length 500 characters; overflow is auto-truncated

Maximum string length: 500
Example:

"Blurry, low quality"

​
audio_urls
string<uri>[]

Driving audio URL array (optional). Currently supports only 1 element

Behavior:

  • Provided: the model uses this audio as the driving source
  • Omitted: the model auto-generates background music or sound effects matching the visual content

Format requirements:

  • Supported formats: wav, mp3
  • Duration range: 2 ~ 30 seconds
  • File size: up to 15MB

Truncation handling:

  • If audio length exceeds duration, the first N seconds are extracted and the rest discarded
  • If audio length is shorter than the video duration, the remaining portion is silent. For example: if audio is 3s and video duration is 5s, the first 3s have sound and the last 2s are silent
Required array length: 1 element
Example:
["https://example.com/audio.mp3"]
​
quality
enum<string>
default:720p

Video quality, defaults to 720p

Options:

  • 720p: Standard definition, standard price, this is the default
  • 1080p: High definition, higher price
Available options:
720p,
1080p
Example:

"720p"

​
aspect_ratio
enum<string>
default:16:9

Video aspect ratio, defaults to 16:9

Output resolution per quality tier:

Quality16:99:161:14:33:4
720p1280×720720×1280960×9601104×832832×1104
1080p1920×10801080×19201440×14401648×12481248×1648
Available options:
16:9,
9:16,
1:1,
4:3,
3:4
Example:

"16:9"

​
duration
number
default:5

Video duration in seconds, range 2-15

Note:

  • Any integer value between 2~15 seconds is supported
  • Final billing is based on the actual generated video duration
Required range: 2 <= x <= 15
Example:

5

​
seed
integer

Random seed, defaults to random

Notes:

  • Range: 1 ~ 2147483647
  • Fixing the seed reduces variation when iterating on prompts and improves reproducibility
Required range: 1 <= x <= 2147483647
Example:

42

​
prompt_extend
boolean
default:false

Whether to enable intelligent prompt rewriting. When enabled, a large model will optimize the prompt, which significantly improves results for simple or insufficiently descriptive prompts.

Note: Default is false. Omitting the field or sending false will not trigger rewriting; explicitly send true to enable.

Example:

false

​
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:

  • Only HTTPS protocol is supported
  • Callbacks to 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
  • Up to 3 retries after failure (retries at 1/2/4 seconds after failure)
  • Callback response format is consistent with the task query API response
  • 2xx status codes are considered successful, other status codes trigger retries
Example:

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

Response

Video 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:

"wan2.7-text-to-video"

​
object
enum<string>

Specific 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

Detailed video task information

​
type
enum<string>

Task output type

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

"video"

​
usage
object

Usage and billing information