curl --request POST \
  --url https://api.evolink.ai/v1/videos/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "wan3.0-image-to-video",
  "prompt": "The boy in the frame “comes alive” out of the wall and performs an English rap at breakneck speed, while street lights under a railway bridge at night create a cinematic mood.",
  "image_start": "https://example.com/first_frame.png",
  "duration": 5,
  "quality": "720p"
}
'

{
  "created": 1761313744,
  "id": "task-unified-1774857405-abc123",
  "model": "wan3.0-image-to-video",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 165,
    "video_duration": 8
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_second",
    "credits_reserved": 50,
    "user_group": "default"
  }
}

{
  "error": {
    "code": "invalid_parameter",
    "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: wan3.0-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"
  }
}

Wan3.0

Wan3.0 Image-to-Video

Pass image_start to strictly set the video’s first frame; add image_end to strictly set the last frame as well
Reference material is not accepted (reference videos / reference audio / files / web pages): first-and-last frames and reference material are mutually exclusive. For mixed references, use Wan3.0 Reference-to-Video instead
At most 2 images (first frame + last frame). For 3 or more reference images, use Reference-to-Video
Asynchronous processing mode, use the returned task ID to query status
Generated video links are valid for 24 hours, please save them promptly

Billing

Billing formula: billed duration = input video duration + output video duration, billed per second
Resolution multiplier: 480p = 1x (baseline), 720p = 2x, 1080p = 4x
Reference images, reference audio, reference files and web page links are not billed
When duration is -1 (smart duration), credits are pre-authorized at the 30-second cap; once the task succeeds it is settled against the actual output duration and the difference is refunded automatically
Turning the audio track on or off costs the same
Failed tasks are not billed, the frozen credits are refunded in full

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": "wan3.0-image-to-video",
  "prompt": "The boy in the frame “comes alive” out of the wall and performs an English rap at breakneck speed, while street lights under a railway bridge at night create a cinematic mood.",
  "image_start": "https://example.com/first_frame.png",
  "duration": 5,
  "quality": "720p"
}
'

{
  "created": 1761313744,
  "id": "task-unified-1774857405-abc123",
  "model": "wan3.0-image-to-video",
  "object": "video.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 165,
    "video_duration": 8
  },
  "type": "video",
  "usage": {
    "billing_rule": "per_second",
    "credits_reserved": 50,
    "user_group": "default"
  }
}

{
  "error": {
    "code": "invalid_parameter",
    "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: wan3.0-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 endpoints require Bearer Token authentication##

Get API Key:

Visit the API Key Management Page to obtain your API Key

Add to request header:

Authorization: Bearer YOUR_API_KEY

Body

application/json

model

enum<string>

default:wan3.0-image-to-video

required

Model name, fixed to wan3.0-image-to-video

Available options:

wan3.0-image-to-video

Example:

"wan3.0-image-to-video"

image_start

string<uri>

required

First-frame image URL, used strictly as the first frame of the generated video. Required

Image limits:

Formats: JPEG, JPG, PNG (transparency not supported), BMP, WEBP
Resolution: width and height in [240, 8000] pixels
Aspect ratio: 1:8 ~ 8:1
File size: up to 20MB

Example:

"https://example.com/first_frame.jpg"

prompt

string

Text prompt for video generation. Chinese and English are supported, each Chinese character / letter counts as 1 character, maximum length 20000 characters; anything beyond that is truncated automatically (no error)

Use it to describe the action, camera movement and visual changes expected between the first frame (or the first and last frames).

Example:

"A young girl's smile gradually turns into a big laugh, the camera slowly pushes in, and the background light shifts from cool tones to warm tones."

image_end

string<uri>

Last-frame image URL, used strictly as the last frame of the generated video. Optional

Constraint: must be used together with image_start, passing the last frame alone is not supported.

Image limits:

Formats: JPEG, JPG, PNG (transparency not supported), BMP, WEBP
Resolution: width and height in [240, 8000] pixels
Aspect ratio: 1:8 ~ 8:1
File size: up to 20MB

Example:

"https://example.com/last_frame.jpg"

duration

integer

default:5

Duration of the generated video in seconds, defaults to 5

Accepted values:

Any integer between 2 and 30
-1: smart duration, the model decides the output length from the prompt and the input material

How smart duration is billed: the output length cannot be known at submission time, so credits are pre-authorized at the 30-second cap; once the task succeeds it is settled against the actual output duration and the excess hold is released automatically. If your balance cannot cover the capped hold, pass an explicit number of seconds instead.

Example:

5

quality

enum<string>

default:720p

Video resolution, defaults to 720p

Options:

480p: lower definition, lowest price (billing baseline)
720p: standard definition, this is the default, 2x the price of 480p
1080p: high definition, 4x the price of 480p

Available options:

480p,

720p,

1080p

Example:

"720p"

aspect_ratio

enum<string>

default:adaptive

Video aspect ratio, defaults to adaptive

Options:

adaptive: adaptive, the model recommends a suitable aspect ratio based on the input material's ratio and the intent of the prompt, this is the default
16:9 (landscape), 9:16 (portrait), 1:1 (square), 4:3, 3:4

Available options:

adaptive,

16:9,

9:16,

1:1,

4:3,

3:4

Example:

"16:9"

generate_audio

boolean

default:true

Whether the output video contains an audio track, defaults to true

Options:

true: the output video contains sound (voices, sound effects, background music), this is the default
false: silent video output

Sound on and sound off cost the same, there is no extra charge.

Example:

true

seed

integer

Random seed, used to reproduce generation results, random by default

Notes:

Range: 0 ~ 2147483647
Fixing the seed reduces variation when iterating on prompts and improves reproducibility

Required range: 0 <= x <= 2147483647

Example:

42

callback_url

string<uri>

HTTPS callback URL for task completion

Callback timing:

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

Security restrictions:

Only HTTPS protocol is supported
Callbacks to private 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 (at 1/2/4 seconds after failure respectively)
Callback response body format is consistent with the task query endpoint response format
A 2xx status code is considered successful; other status codes trigger retries

Example:

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

Response

Video generation task created successfully

created

integer

Task creation timestamp

Example:

1761313744

string

Task ID

Example:

"task-unified-1774857405-abc123"

model

string

Actual model name used

Example:

"wan3.0-image-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

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

Wan3.0 Image-to-Video

Billing

Authorizations

Body

Response