curl --request GET \
  --url https://api.anchorbrowser.io/v1/billing \
  --header 'anchor-api-key: <api-key>'

{
  "data": {
    "credits": 42.5,
    "credits_used": 12.5,
    "included_credits": 50,
    "billing_period": "2026-04",
    "tier": "monthly_starter",
    "gifts_balance": 42.5,
    "max_concurrent_browsers": 25,
    "cost_limit": 100
  }
}