Cheapest-chain ranking: all supported chains by all-in USD tx cost

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "maxTimeoutSeconds": 60
  }
]

{
  "bazaar": {
    "category": "defi",
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "gas": "Gas limit to price.",
          "speed": "Fee tier used for ranking.",
          "txType": "Transaction preset. Overrides gas and sets the L1 calldata size."
        },
        "type": "http"
      },
      "output": {
        "properties": {
          "cheapest": {
            "type": [
              "string",
              "null"
            ]
          },
          "degraded": {
            "items": {
              "type": "object"
            },
            "type": "array"
          },
          "fetchedAt": {
            "type": "string"
          },
          "gasUsed": {
            "type": "integer"
          },
          "ranking": {
            "items": {
              "type": "object"
            },
            "type": "array"
          },
          "savingsVsEthereumUsd": {
            "type": "number"
          },
          "speed": {
            "type": "string"
          },
          "txType": {
            "type": [
              "string",
              "null"
            ]
          }
        },
        "required": [
          "gasUsed",
          "speed",
          "ranking",
          "cheapest",
          "savingsVsEthereumUsd",
          "degraded"
        ],
        "type": "object"
      }
    },
    "routeTemplate": "https://x402.professorsausages.com/gas-oracle/compare",
    "schema": {
      "properties": {
        "input": {
          "type": "object"
        },
        "output": {
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "catalog": {
    "catalogUrl": "https://x402.professorsausages.com/?ref=402&v=related&from=gas-oracle",
    "message": "You called Multichain Gas Oracle. Agents doing defi work commonly also use these — same pay-per-call model, each with a FREE real sample record (freeSample link):",
    "related": [
      {
        "call": "/swap-quote?ref=xsell&v=related&from=gas-oracle",
        "freeSample": "/swap-quote/sample?ref=xsell&v=related&from=gas-oracle",
        "name": "DEX Swap Quote",
        "summary": "Read-only on-chain swap pricing for agents"
      }
    ],
    "strategy": "related"
  },
  "discount": {
    "header": "X-Intent",
    "hint": "Send X-Intent: <40+ chars describing what you're building and what data you need> for 50% off this call.",
    "off": "50%"
  },
  "help": {
    "docs": "https://x402.professorsausages.com/gas-oracle",
    "example": "https://x402.professorsausages.com/gas-oracle/compare",
    "openapi": "https://x402.professorsausages.com/gas-oracle/openapi.json",
    "sample": "https://x402.professorsausages.com/gas-oracle/sample"
  },
  "sample": {
    "hint": "A real cached response from this API (with its capture timestamp), free — judge the data quality before paying.",
    "url": "https://x402.professorsausages.com/gas-oracle/sample"
  },
  "suggest": {
    "hint": "Missing data you'd pay for? POST {want, would_pay_usd} — free. The most-requested datasets get built first.",
    "url": "https://x402.professorsausages.com/suggest"
  }
}

curl "https://x402.professorsausages.com/gas-oracle/compare"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://x402.professorsausages.com/gas-oracle/compare");
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://x402.professorsausages.com/gas-oracle/compare")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header