Evidence row 1037305

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.marketintelligenceapi.com/api/v1/markets/gas"
    ]
  ],
  "name": "Market Intelligence API",
  "owner_address": "0x48d5a78d480b4c32de319c2aef69e682dc304615",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:137",
        "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:42161",
        "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "9CAhY1vdaZfrfoto3KLQtRAo1dVWxNn5xAfmc2XbZVsf",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "0x79A02482A880bCE3F13e09Da970dC34db4CD24d1",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:480",
        "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
        "scheme": "exact"
      },
      {
        "amount": "900",
        "asset": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
        "extra": {
          "name": "EURC",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
        "scheme": "exact"
      },
      {
        "amount": "900",
        "asset": "0x1C60ba0A0eD1019e8Eb035E6daF4155A5cE2380B",
        "extra": {
          "name": "EURC",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:480",
        "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
        "extra": {
          "name": "USDC",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:84532",
        "payTo": "0x48d5A78d480B4C32dE319C2aEF69e682Dc304615",
        "scheme": "exact"
      }
    ],
    "description": "Gas price and transaction fees per chain ($0.001): base fee, priority fee percentiles and the USD cost of a transfer and a DEX swap on Ethereum, Base, Arbitrum, Optimism, Polygon and other EVM chains. Use before sending a transaction to pick the cheapest chain.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "chains": [
                {
                  "baseFeeGwei": 0.0071,
                  "chain": "base",
                  "gasPriceGwei": 0.0092,
                  "nativeToken": "ETH",
                  "swapCostUsd": 0.00368,
                  "transferCostUsd": 0.000515
                }
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {},
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "additionalProperties": true,
              "properties": {
                "example": {
                  "description": "Example JSON response returned by this endpoint"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input",
            "output"
          ],
          "type": "object"
        }
      },
      "sign-in-with-x": {
        "info": {
          "domain": "api.marketintelligenceapi.com",
          "expirationTime": "2026-10-27T18:16:10.099Z",
          "issuedAt": "2026-10-27T18:11:10.099Z",
          "nonce": "2e38f0e3562103b018bb1949e44795d5",
          "resources": [
            "https://api.marketintelligenceapi.com/api/v1/markets/gas"
          ],
          "statement": "Pay this call from the prepaid credit of this wallet (bought with POST /api/v1/credits/buy/5)",
          "uri": "https://api.marketintelligenceapi.com/api/v1/markets/gas",
          "version": "1"
        },
        "supportedChains": [
          {
            "chainId": "eip155:8453",
            "type": "eip191"
          },
          {
            "chainId": "eip155:137",
            "type": "eip191"
          },
          {
            "chainId": "eip155:42161",
            "type": "eip191"
          },
          {
            "chainId": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
            "type": "ed25519"
          },
          {
            "chainId": "eip155:480",
            "type": "eip191"
          }
        ]
      }
    },
    "lastUpdated": "2026-10-27T18:11:10.154Z",
    "quality": {
      "l30DaysTotalCalls": 10,
      "l30DaysUniquePayers": 7,
      "lastCalledAt": "2026-10-27T18:11:09.69Z"
    },
    "resource": "https://api.marketintelligenceapi.com/api/v1/markets/gas",
    "serviceName": "Market Intelligence API",
    "tags": [
      "gas",
      "gas oracle",
      "fees",
      "evm",
      "transactions"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Gas price and transaction fees per chain ($0.001): base fee, priority fee percentiles and the USD cost of a transfer and a DEX swap on Ethereum, Base, Arbitrum, Optimism, Polygon and other EVM chains. Use before sending a transaction to pick the cheapest chain."
}

What the leaf hashes

{"body":"6b5f1e120041e892542d15d3a60231e9d7e04a59c84499bc54e8497610a65442","id":1037305,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298233860685,"prev":547685,"subject":"x402_bazaar:https://api.marketintelligenceapi.com/api/v1/markets/gas","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-29 (242798 rows).

1. 0x2720a403c64e98891a5cd7985ab0679308f7780820b9d381a26d2e57e0d26ab8
2. 0x44a3acf39f1a4812ead9b24f01ae06dd418145ab2175eb767a019a086dd40c73
3. 0xa0e32037324f82ef59d81970b0cef07d8e3020bcc543045acb46ec82898fd919
4. 0xd4044ac88f29a79e75baf8e7829aa3f13f35ccd06069ecfe2c4ef6005a00d75d
5. 0x03cc788f49b2a8e3eebf1f0d1225e89c074b81624b8aeabf8cf86cf13345719d
6. 0x70a374654619d3d4329959103ffcda26f11fdebd37320aa1e164b5eac3b23100
7. 0xd6fc53d2c812fc1eedd794230016561665a8e26c0f2fbb662a17924908f2c932
8. 0x7b4096ba0e1931920b4b960e6fdc0e2b5feba8a23e68442b0108e6a67b02c85d
9. 0x2c057f37a0057684d28ebac0b188203622caf29ac94704af8b1837af797fd990
10. 0xea8deff4a68158de412a8f583e4e312a0dd6f600ca7fcdd3ab95a3b73001b2a0
11. 0xe70a1fb972e08d1e82211153449663f72809169a45f324d8e49ba224f9f883fe
12. 0xf30da75fe0e12b1668c26a6b3d0bb8e0c311e494aa0f674a84e8a5c6af4ebeaa
13. 0x0578ac51015c13b031ebae2ad1327fb530b3c3e756fcd27ad5aec34155ce2a69
14. 0xe5630d765942d2009587828da7f2d173776eecb52114ac282f05c7b772bfe337
15. 0x00268e62f7d5ca6313e0e60afdc2bd4f52c6dbdb3b4b4d27e01e634b4bcb1d2c
16. 0x1c3764b490d23b94e5ac838c89f8d3850dedb0819196f367da2479c7a88bf2c0
17. 0xd76435ead496863d8b0bfab3434f54cd11da3c49d104fc4064b9cb3381567bbd
18. 0xd56e61af23709ed9f460471e3c08400c0142ee83e1fd9057e46350d12edf9c07

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1