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POST
/
v1
/
images
/
generations
wan2.5-text-to-image Interface
curl --request POST \
  --url https://api.evolink.ai/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "wan2.5-text-to-image",
  "prompt": "A serene lake reflecting the beautiful sunset scenery"
}
'
{
  "created": 1757156493,
  "id": "task-unified-1757156493-imcg5zqt",
  "model": "wan2.5-text-to-image",
  "object": "image.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 30
  },
  "type": "image",
  "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:wan2.5-text-to-image
required

Model name

Available options:
wan2.5-text-to-image
Example:

"wan2.5-text-to-image"

​
prompt
string
required

Prompt describing the image to generate, limited to 2000 tokens

Maximum string length: 2000
Example:

"A peaceful lake reflecting the beautiful sunset"

​
size
string

Size of the generated image, currently only supports pixel format:

  • Width x Height, such as: 768x768, 1280x1280, 1440x1440 and other values within the range
  • Total pixel range: [768x768, 1440x1440]
  • Aspect ratio range: [1/4, 4]
Example:

"1280x1280"

​
n
integer

Number of images to generate, supports any integer value between [1,4]

Note:

  • A single request will be pre-charged based on the value of n, and the actual charge will be based on the number of generated images
Example:

1

​
prompt_extend
boolean
default:true

Whether to enable intelligent prompt rewriting. When enabled, a large language model will optimize the prompt. This is particularly effective for prompts that lack detail or are too simple. Default value is true

Example:

true

​
callback_url
string<uri>

HTTPS callback address after task completion

Callback Timing:

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

Security Restrictions:

  • Only HTTPS protocol is supported
  • Callback to internal IP addresses is 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 on failure (retries after 1 second/2 seconds/4 seconds)
  • Callback response body format is consistent with the task query API response format
  • Callback address returning 2xx status code is considered successful, other status codes will trigger retry
Example:

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

Response

Image task created successfully

​
created
integer

Task creation timestamp

Example:

1757156493

​
id
string

Task ID

Example:

"task-unified-1757156493-imcg5zqt"

​
model
string

Actual model name used

Example:

"wan2.5-text-to-image"

​
object
enum<string>

Specific task type

Available options:
image.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

Asynchronous task information

​
type
enum<string>

Task output type

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

"image"

​
usage
object

Usage and billing information