EvoLink で Midjourney V8.1 API を使う方法：ペイロード、ポーリング、コールバック

curl --request POST \
  --url https://api.evolink.ai/v1/images/generations \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "mj-v8.1",
    "prompt": "a premium product photo of a matte black espresso machine on a marble counter --ar 16:9 --s 250",
    "quality": "standard",
    "model_params": {
      "speed": "fast"
    },
    "callback_url": "https://your-domain.com/webhooks/evolink-image-task"
  }'

curl --request GET \
  --url https://api.evolink.ai/v1/tasks/<task_id> \
  --header 'Authorization: Bearer YOUR_API_KEY'

{
  "model": "mj-v8.1",
  "prompt": "a cinematic product photo of a titanium travel mug on wet black stone --ar 16:9 --s 250",
  "quality": "standard",
  "model_params": {
    "speed": "fast"
  }
}

{
  "model": "mj-v8.1",
  "prompt": "https://your-cdn.example.com/reference-sofa.jpg a luxury living room campaign image --ar 4:3 --iw 1.2",
  "quality": "standard",
  "model_params": {
    "speed": "fast"
  }
}