APEX Runner: Arb Opportunity Delta Signal

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x8D0663BBb967ebF1c047405A888DDf865f3E8854",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "7000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "category": "execution",
    "description": "Current arbitrage spread delta between tracked exchanges (Kraken and Hyperliquid) for BTC and ETH. Returns live delta %, direction, net spread after fees, and viability flag. Sourced from APEX Runner's real-time cross-exchange monitoring.",
    "example": {
      "arb_delta_pct": 0.18,
      "best_pair": "BTC",
      "direction": "kr_buy_hl_sell",
      "estimated_profit_usd": 0,
      "exchanges": [
        "kraken",
        "hyperliquid"
      ],
      "net_spread_pct": -0.17,
      "viable": false
    },
    "info": {
      "input": {
        "method": "GET",
        "type": "http"
      },
      "output": {
        "arb_delta_pct": "float — gross price spread between exchanges as percentage",
        "best_pair": "string — coin with largest spread (BTC or ETH)",
        "direction": "string — arb direction: kr_buy_hl_sell or hl_buy_kr_sell",
        "estimated_profit_usd": "float — estimated profit on $10,000 order at current spread",
        "example": {
          "arb_delta_pct": 0.18,
          "best_pair": "BTC",
          "net_spread_pct": -0.17,
          "viable": false
        },
        "exchanges": "array — exchanges being compared",
        "net_spread_pct": "float — spread after estimated round-trip fees (positive = profitable)",
        "type": "json",
        "viable": "boolean — true when net_spread_pct exceeds 0.35% threshold"
      }
    },
    "name": "APEX Arb Opportunity Delta",
    "outputSchema": {
      "arb_delta_pct": "float",
      "best_pair": "string",
      "direction": "string",
      "estimated_profit_usd": "float",
      "exchanges": "array",
      "net_spread_pct": "float",
      "viable": "boolean"
    },
    "schema": {
      "properties": {
        "input": {
          "properties": {
            "queryParams": {
              "properties": {},
              "type": "object"
            }
          },
          "required": [
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "_apex": {
                  "properties": {
                    "evolution_runs": {
                      "type": "integer"
                    },
                    "instance": {
                      "type": "string"
                    },
                    "live_capital_deployed": {
                      "type": "boolean"
                    },
                    "live_trading": {
                      "type": "boolean"
                    },
                    "signal": {
                      "type": "string"
                    },
                    "signal_hash": {
                      "type": "string"
                    },
                    "source": {
                      "type": "string"
                    },
                    "trades_backing_signal": {
                      "type": "integer"
                    },
                    "verify_at": {
                      "type": "string"
                    },
                    "version": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "apex_arb_threshold_pct": {
                  "type": "number"
                },
                "next_scan_seconds": {
                  "type": "integer"
                },
                "no_opportunity_coins": {
                  "items": {
                    "type": "string"
                  },
                  "type": "array"
                },
                "opportunities": {
                  "items": {},
                  "type": "array"
                },
                "scan_timestamp": {
                  "type": "string"
                }
              },
              "type": "object"
            }
          },
          "type": "object"
        }
      },
      "type": "object"
    },
    "version": "1.0.0"
  }
}

curl "https://apexrunner.ai/signals/arb-opportunity-delta"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://apexrunner.ai/signals/arb-opportunity-delta");
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://apexrunner.ai/signals/arb-opportunity-delta")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header