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POST
/
v1
/
images
/
generations
curl --request POST \
  --url https://api.evolink.ai/v1/images/generations \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "mj-v8.1",
  "prompt": "A cinematic shot of a Maine Coon cat on a neon-lit balcony --ar 16:9 --s 500",
  "quality": "standard",
  "model_params": {
    "speed": "fast"
  }
}
'
{
  "created": 1757165031,
  "id": "task-unified-1757165031-mjv81",
  "model": "mj-v8.1",
  "object": "image.generation.task",
  "progress": 0,
  "status": "pending",
  "task_info": {
    "can_cancel": true,
    "estimated_time": 45
  },
  "type": "image",
  "usage": {
    "billing_rule": "per_call",
    "credits_reserved": 1.8,
    "user_group": "default"
  }
}
Midjourney has a built-in content moderation system. If some generated images are filtered by moderation, credits consumed for that request will not be refunded. Please ensure your prompts comply with content guidelines.

Authorizations

​
Authorization
string
header
required

All endpoints 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:mj-v8.1
required

Model name

Available options:
mj-v8.1
​
prompt
string
required

Prompt, supports all Midjourney V8.1 native parameter syntax (e.g. --ar 16:9 --s 500).

Image-to-Image: Place image URLs at the beginning of the prompt. Supported formats: .png, .gif, .webp, .jpg, .jpeg

Image-to-Image Rules:

  • 1 image + no text = invalid (will return error)
  • 1 image + text description = valid
  • 2+ images + no text = valid
  • 2+ images + text description = valid
Maximum string length: 8192
Example:

"A cinematic shot of a Maine Coon cat on a neon-lit balcony --ar 16:9 --s 500"

​
quality
enum<string>
default:standard

Output quality

  • standard: Standard resolution (default), 1x multiplier
  • hd: Native HD output, 1.5x multiplier. Mutually exclusive with speed: draft

Pricing note: the quality multiplier is combined (multiplied) with the speed multiplier.

Available options:
standard,
hd
​
model_params
object

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
  • 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 (retries at 1s/2s/4s after failure)
  • Callback response body format matches the task query endpoint
  • A 2xx status code is considered successful; other status codes trigger retries
Example:

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

Response

Task created successfully

​
created
integer

Task creation timestamp

Example:

1757165031

​
id
string

Task ID

Example:

"task-unified-1757165031-mjv81"

​
model
string

Actual model name used

Example:

"mj-v8.1"

​
object
enum<string>

Task object 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

Async task info

​
type
enum<string>

Task output type

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

"image"

​
usage
object

Usage and billing info