curl --request GET \
  --url https://api.httpayer.com/relay/limits/{address}

{
  "wallet_address": "<string>",
  "mainnet": {
    "wallet_limits": {
      "daily_limit": 100,
      "today_spent": 25.5,
      "remaining": 74.5,
      "percentage_used": "25.50"
    },
    "system_limits": {
      "daily_limit": 1000,
      "today_spent": 450.75,
      "remaining": 549.25,
      "percentage_used": "45.08"
    },
    "can_relay": true
  },
  "testnet": {
    "wallet_limits": {
      "daily_limit": 100,
      "today_spent": 5,
      "remaining": 95,
      "percentage_used": "5.00"
    },
    "system_limits": {
      "daily_limit": 1000,
      "today_spent": 50,
      "remaining": 950,
      "percentage_used": "5.00"
    },
    "can_relay": true
  },
  "relay_fee_model": {
    "percentage": 3,
    "minimum_usd": 0.002,
    "description": "3% with $0.002 minimum",
    "formula": "Fee = max(percentage × target_amount, minimum_fee)"
  },
  "reset_time": "2023-11-07T05:31:56Z"
}