crypto derived

{
  "input": {
    "type": "http",
    "method": "GET",
    "queryParams": {
      "pair": "BTC/USDT",
      "amount_usd": "10000"
    }
  },
  "output": {
    "type": "json",
    "errors": {
      "400": {
        "example": {
          "error": "invalid request"
        },
        "description": "Invalid or missing parameter(s). Returned before the payment gate on paid requests, so a malformed call is never charged. JSON body: { error: <what is wrong and how to fix it> } plus usage hints."
      },
      "402": {
        "description": "Payment required — x402 v2 challenge; the accepts array lists scheme, network, and amount. Retry the same request with a PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Verification is free."
      },
      "500": {
        "example": {
          "error": "upstream_failed"
        },
        "description": "Unexpected server error. If a payment settled without a usable result, contact info@theaslangroupllc.com with the settlement tx hash for a re-run or credit."
      }
    },
    "example": {
      "pair": "BTC/USDT",
      "scan_time": "2026-06-06T12:00:00Z",
      "market_context": "Tight BTC spreads across CEXs at ~0.01%. Market-makers efficiently equalize prices. CEX spot arb is rarely viable without pre-positioned capital on both sides.",
      "exchange_prices": [
        {
          "ask": 67841.2,
          "bid": 67840.1,
          "last": 67840.55,
          "exchange": "Binance",
          "volume_24h_usd": 2100000000
        },
        {
          "ask": 67838,
          "bid": 67836.8,
          "last": 67837.4,
          "exchange": "Coinbase",
          "volume_24h_usd": 380000000
        },
        {
          "ask": 67843.5,
          "bid": 67842,
          "last": 67842.3,
          "exchange": "Kraken",
          "volume_24h_usd": 95000000
        }
      ],
      "arb_opportunities": [
        {
          "viable": false,
          "buy_price": 67838,
          "sell_price": 67842,
          "buy_exchange": "Coinbase",
          "sell_exchange": "Kraken",
          "estimated_fees": {
            "taker_fee_pct": 0.2,
            "total_cost_pct": 0.214,
            "withdrawal_fee_usd": 2.5
          },
          "net_profit_pct": -0.208,
          "viability_note": "Spread of 0.006% is destroyed by 0.2% taker fees alone. CEX spot arb is only viable on high-spread moments (>0.5%) with pre-funded accounts on both sides.",
          "blocking_factors": [
            "Fees exceed spread",
            "BTC withdrawal takes 30-60 min"
          ],
          "gross_spread_pct": 0.0059,
          "execution_time_minutes": 45,
          "net_profit_per_10k_usd": -20.8
        }
      ],
      "pulse_suggestions": [],
      "better_alternatives": [
        "Perps funding rate carry (/api/perps)",
        "DEX price arb (/api/dex)",
        "DeFi yield spread (/api/defi)"
      ],
      "why_cex_arb_is_hard": "Withdrawal delays (30 min to 24h) mean the spread evaporates before transfer completes. Pre-funded accounts on both sides eliminate withdrawal risk but require 2x capital."
    }
  }
}