Evidence row 1038851

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://freetier-agent-api.pages.dev/api/gas"
    ]
  ],
  "name": "Agent Extraction API",
  "owner_address": "0x165eb3dc3e98403ecb1141e90400f5e71806554b",
  "raw": {
    "accepts": [
      {
        "amount": "1500",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x165Eb3dC3E98403ecB1141e90400F5e71806554B",
        "scheme": "exact"
      }
    ],
    "description": "Live gas prices across 5 EVM chains in one call (Ethereum, Base, Arbitrum, Optimism, Polygon): gas price in gwei, latest block, and the cost of an ETH transfer, an ERC-20/USDC transfer and a swap in native coin and USD, plus a ranking of which chain is cheapest right now. Public RPC nodes with failover; no keys.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "chains": "all"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "chains": [
                {
                  "block": 37000000,
                  "chain": "base",
                  "chainId": 8453,
                  "estimates": {
                    "erc20_transfer": {
                      "gas": 65000,
                      "native": "0.00000039",
                      "usd": 0.0012
                    }
                  },
                  "gasPriceGwei": 0.006,
                  "nativeCoin": "ETH"
                }
              ],
              "cheapestForUsdcTransfer": "base",
              "ranking": [
                "base",
                "optimism",
                "arbitrum",
                "polygon",
                "ethereum"
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "chains": {
                      "description": "\"all\" (default) or a comma list: ethereum,base,arbitrum,optimism,polygon",
                      "type": "string"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793252197/bazaar-icons/19906174df41ffa4.png",
    "lastUpdated": "2026-10-29T07:52:32.137Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-29T07:52:31.981Z"
    },
    "resource": "https://freetier-agent-api.pages.dev/api/gas",
    "serviceName": "Agent Extraction API",
    "tags": [
      "gas",
      "multi-chain",
      "crypto",
      "ethereum",
      "base"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Live gas prices across 5 EVM chains in one call (Ethereum, Base, Arbitrum, Optimism, Polygon): gas price in gwei, latest block, and the cost of an ETH transfer, an ERC-20/USDC transfer and a swap in native coin and USD, plus a ranking of which chain is cheapest right now. Public RPC nodes with failover; no keys."
}

What the leaf hashes

{"body":"13c9b2d70faa3fbeb85e2c4be710266988ccd7d72460f1c65bc4c32350350c6b","id":1038851,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298276300555,"prev":null,"subject":"x402_bazaar:https://freetier-agent-api.pages.dev/api/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. 0xd897cc59a428aa0f95bb21fa5771fd7bab57448ed25ac3e3a13008725efeb234
2. 0x12c73ff6dc0de262cc3ffa3a12395867f768b18259e6f1264f57962ce4dd5bcd
3. 0x59b2d482b665f8328c767b4f758422cfdd04d61a901bfe59eae8586eb82792ae
4. 0xad6af41b3275d8b68765fd37ddefb175443d4d22085842a87bd47cdd3f4d401f
5. 0x6f039b80b30d979ebb96d2d7e57800771e168c7c08f1a87e71e9820038431c82
6. 0xe2f009aaa028cb3b33504b7a8681e8857d4b27683b6e10d64b7757c1b2bfaada
7. 0x78e7c00a2e7e360fa7b8adbe064034e08cfc9ec3df213020c950acfd2015f81c
8. 0x75ae0fe72e80c1308ffb4b3e8ee0b1bfc6ab4aa3c9b3f3821eb3a29d8047353d
9. 0x345e7f21502f8a55fec94b501031bbaab249ff6b06f8cd6c0a12a57999463ff3
10. 0x0d8b275fdac3fb5eff186038f65fd019f122b72c9f27bd5346246d8830d86d5e
11. 0x13772c79d97c666f787fde948e3b3d0825d6d5d5106a43281968f02237c59008
12. 0x8522b6d17f15c0c1abc36194c9894bdee4c4687a5eb503bcb0fab90198db90af
13. 0xbab97b696ffe737616975d37e243af07fa246058d99161c165f9f96fde8768ff
14. 0xb75e183026f9112474e3710d846b63188d3bba750c3ad3feabd9a22ee7d080fc
15. 0xa7d3fa0a08edea990614977b51a6b3289c357a88d8ca06dcbfe67415a017c0e7
16. 0xa034ebc8d117fbf1ed466b70baa0478bf213b743e1a41cba1d2da7a9f310184d
17. 0x1597ec94933260048e5e583aff1ad0fd44cc49efcd0a994091ed5db4924d7b02
18. 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1