curl --request GET \
  --url https://app.autoposting.ai/api-proxy/billing/credit-summary \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "data": {
    "balance": 450,
    "monthlyAllocation": 500,
    "used": 50,
    "breakdown": {
      "clips": 30,
      "aiGeneration": 15,
      "other": 5
    },
    "resetAt": "2024-02-01T00:00:00Z"
  }
}