curl -X GET '/subscription/current' \
  -H 'Authorization: Bearer YOUR_ACCESS_TOKEN'

{
  "success": true,
  "data": {
    "tier_id": "tier_pro",
    "tier_name": "Pro",
    "status": "active",
    "auto_renew": true,
    "current_period_start": "2026-04-01T00:00:00Z",
    "current_period_end": "2026-05-01T00:00:00Z",
    "price_usd": 49,
    "features": {
      "rate_limit": 300,
      "wallets": 50,
      "api_keys": 10,
      "webhooks": 20
    }
  }
}