エラー

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Request validation failed",
    "details": [{ "field": "payload.prompt", "message": "payload.prompt or payload.query is required" }],
    "timestamp": "2026-07-09T04:12:00.000Z"
  }
}

{
  "success": false,
  "error": {
    "code": "REGION_UNSUPPORTED",
    "message": "CHATGPT cannot be served for country='CN': no proxy vendor has exit supply in CN. This is a permanent capability gap, not a transient one — retrying will not help. GOOGLE and AIMODE are unaffected by exit-IP limits and remain available for this country.",
    "details": { "taskType": "CHATGPT", "country": "CN", "cause": "no_proxy_route", "retryable": false },
    "timestamp": "2026-07-09T04:12:00.000Z"
  }
}

{
  "success": true,
  "summary": { "total": 3, "succeeded": 2, "failed": 1 },
  "results": [
    { "success": true,  "index": 0, "task": { "...": "..." } },
    { "success": false, "index": 1, "error": { "code": "REGION_UNAVAILABLE", "message": "..." } },
    { "success": true,  "index": 2, "task": { "...": "..." } }
  ]
}

{
  "success": true,
  "task": { "id": "8f2c1e40-...", "status": "FAILED", "...": "..." },
  "credits": { "creditsToCharge": 0, "creditsCharged": 0 },
  "error": "ENGINE_TIMEOUT: The engine did not answer before the task deadline."
}