Evidence row 1790606

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://freetier-agent-api.pages.dev/api/base-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": "Base gas price: Live Base mainnet gas price (gwei), latest block, and estimated ETH cost of a USDC transfer (~65k gas) and a plain ETH transfer (21k gas).",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "at": "2026-10-24T18:11:05.049Z",
              "block": 53038058,
              "eth_transfer_eth": 1.26e-7,
              "gas_price_gwei": 0.006,
              "gas_price_wei": 6000000,
              "network": "Base mainnet (chain 8453)",
              "note": "L2 execution gas only; Base also charges a small L1 data fee per tx. x402 payments via a facilitator are gas-free for the payer.",
              "rpc": "https://mainnet.base.org",
              "sources": [
                {
                  "name": "Base mainnet public RPC (live)",
                  "url": "https://mainnet.base.org"
                }
              ],
              "usdc_transfer_eth": 3.9e-7,
              "usdc_transfer_gas_estimate": 65000
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {},
                  "required": [],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "at": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "block": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "eth_transfer_eth": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "gas_price_gwei": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "gas_price_wei": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "network": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "note": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "rpc": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "sources": {
                      "items": {
                        "type": [
                          "object",
                          "null"
                        ]
                      },
                      "type": "array"
                    },
                    "usdc_transfer_eth": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "usdc_transfer_gas_estimate": {
                      "type": [
                        "number",
                        "null"
                      ]
                    }
                  },
                  "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": "2026-11-01T07:16:32.876Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T07:16:32.734Z"
    },
    "resource": "https://freetier-agent-api.pages.dev/api/base-gas",
    "serviceName": "Agent Extraction API",
    "tags": [
      "crypto",
      "base",
      "gas"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Base gas price: Live Base mainnet gas price (gwei), latest block, and estimated ETH cost of a USDC transfer (~65k gas) and a plain ETH transfer (21k gas)."
}

What the leaf hashes

{"body":"af206f7382513a32e10def8ab410a13e310a468a9c44df393ede26d0cc834a6e","id":1790606,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793559936180436,"prev":1038855,"subject":"x402_bazaar:https://freetier-agent-api.pages.dev/api/base-gas","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0xb4708dcdba952493fb32bb0f695bd3bee599981afeb55ac7626710ce9053791e
2. 0x9ec34f59a240f6ab8453a57b8a17eb54b7bc914fa5c3b23f26ea4e036eb5c75d
3. 0x645448fecf01ccf5d23410b9d2b09d8b0bdd46787d90feb5ce2cfed6e4868f8d
4. 0x5afef03edf361f156c41aa97a501e5ecd04e0c8f5048499045d53bdaec2c9002
5. 0xf2ace6122b9fb27c19182081150fae55c7c7a8b30fff0d89b31f15533ab7cc28
6. 0xf24527dfa7d7b5b6a77468db6387d786332074a0756e1b5fcea659e8915c4bc5
7. 0x22e36c953d42b481e48425427cd11cb345a2b65542fa6bba713055685c56e8f7
8. 0x3cb337364162cead7fdfee9a78d2b79e54112be2f44351793a0a4ce1b72ebcf1
9. 0x5c98c4742843e5ac4883fbf7c17cbae6756caa3494c1696ee8fa0c47204a0117
10. 0xd5170f5592a111fdc27fc412100ea86e59111c9587ecea675138b4d8792f41c5
11. 0x556fd2993ae63936ef19f8d0cb248690b8790b804a47e8b1f6052b6403bc2376
12. 0xda43e7c33db4b2a49eac5372d59f78be85b20270ae35f3877840061da57873f3
13. 0x76bd6c29668276bc9bcae1a73c60a4d02ab25f5e47f437d7c2c27bab58a536a3
14. 0xc4208f09c5a97556dbf0e04ca82216f9056e3cf547ebb46cc61036bfd76910cb
15. 0xf6217f3e2344dd9bf8c6e296c4729fbf7611d258b93c45e1bbe5f62e65e8e714
16. 0x8339aa87501c4d4f8b38a13e480a7c563957e09fb5711bed7cf189d6787f960d
17. 0xb5916fb7a3e87dc0702e46eeadcd22652e2e1e755f8d429cc7a14a67a350b51b
18. 0x6142ac48fda269c17791c79da99c2456ac6acfe98268f4d168a404fd6040c703
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90