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Kevin Kling Subject Reference

POST 
/open/aigw/gateway/generations

Generate subject-consistent videos using images (with subject IDs), videos, or pre-created subjects (ElementId). Use <<<id>>> in the prompt to reference subjects. Only supports Kling 3.0 / 3.0-Omni.

Workflow​

  1. Call this endpoint to submit a video generation task and obtain taskNo
  2. When processing is complete, the system sends a POST callback notification to callbackUrl with the result
  3. You can also poll the status via GET /open/aigw/gateway/generationTask?taskNo=xxx

Request​

Responses​

任务提交成功

Callback Notification Format​

After generation completes, the system POSTs the following data to callbackUrl:

On success:

{
  "taskNo": "a1b2c3d4...",
  "status": "success",
  "model": "kling_3.0-Omni_subject_reference",
  "timestamp": 1234567890,
  "data": {
    "task_id": "6928de47-2e53-4ee6-901b-be05a8bf7669",
    "status": "SUCCESS",
    "request_id": "7d8d7f71a7314779b6947eed659085fa",
    "result": ["https://cdn.example.com/result_1.mp4"],
    "error_info": "",
    "traceback": ""
  },
  "usage": { "totalPoints": 10 },
  "sign": "sha256hex..."
}

On failure:

{
  "taskNo": "a1b2c3d4...",
  "status": "failed",
  "model": "kling_3.0-Omni_subject_reference",
  "timestamp": 1234567890,
  "error": "Error message",
  "sign": "sha256hex..."
}

Signature verification: sign = SHA256(taskNo + timestamp + apiKey)

Query Generation Task Status​

GET /open/aigw/gateway/generationTask?taskNo={taskNo}

It is recommended to use the callback method first; this endpoint serves as a polling fallback.

Request parameters:

ParameterTypeRequiredDescription
taskNostringYesTask number returned when submitting the task

Response example (success):

{
  "code": 1000,
  "message": "success",
  "data": {
    "taskNo": "a1b2c3d4...",
    "model": "kling_3.0-Omni_subject_reference",
    "status": "success",
    "createTime": "2025-01-01 12:00:00",
    "data": { "result": ["https://cdn.example.com/result_1.mp4"] },
    "usage": { "totalPoints": 10 }
  }
}

Response example (failure):

{
  "code": 1000,
  "message": "success",
  "data": {
    "taskNo": "a1b2c3d4...",
    "model": "kling_3.0-Omni_subject_reference",
    "status": "failed",
    "error": "Reason for generation failure"
  }
}

status values: pending (queued), processing (in progress), success (completed), failed (failed)