Real-time arbitrage spreads between tokenized securities and actual stock prices

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x24FAcafEB49b4e3FACF0B3e69604A2F4640c9bf2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "description": "Spot tokenized stock premiums/discounts vs actual NYSE/NASDAQ prices. Tracks NVIDIA, Tesla, Alphabet, Micron, Circle, Strategy tokens vs their underlying equities. Updated via CoinGecko (tokens) + Twelve Data (stocks).",
      "iconUrl": "https://memoryapi.org/icon.png",
      "input": {
        "method": "GET",
        "queryParams": {},
        "schema": {
          "properties": {},
          "required": []
        },
        "type": "http"
      },
      "output": {
        "example": {
          "as_of": "2025-01-02T18:00:00Z",
          "disclaimer": "Not financial advice. Spreads may reflect fees, liquidity differences, or fractional denomination.",
          "pairs": [
            {
              "note": "Tokenized asset may trade at premium/discount due to liquidity, fees, or market structure",
              "premium_pct": 0.1,
              "signal": "FAIR_VALUE",
              "spread_usd": 0.15,
              "stock_price_usd": 143.1,
              "stock_ticker": "NVDA",
              "token_name": "NVIDIA xStock",
              "token_price_usd": 143.25,
              "token_symbol": "XNVDA"
            }
          ],
          "source": "CoinGecko + Twelve Data",
          "success": true
        }
      },
      "serviceName": "MemoryAPI Market",
      "tags": [
        "finance",
        "stocks",
        "crypto",
        "market"
      ]
    },
    "schema": {
      "properties": {
        "input": {
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            }
          },
          "required": [
            "method"
          ]
        }
      }
    }
  }
}

curl "https://market.memoryapi.org/x402/market/arbitrage"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://market.memoryapi.org/x402/market/arbitrage");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://market.memoryapi.org/x402/market/arbitrage")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header