クレジット

GET /v1/credits

curl https://api.ones1ght.com/v1/credits \
  -H "Authorization: Bearer $API_KEY"

{
  "success": true,
  "data": {
    "balance": 150.00
  }
}

{
  "success": true,
  "data": {
    "thread_id": "thr_xxx",
    "assistant_message": { ... },
    "credits": {
      "used": 289,
      "balance": 149.50
    }
  }
}