Evidence row 563444

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://how.is/v1/url/preflight"
    ]
  ],
  "name": "how.is",
  "owner_address": "0xa76a0e93c5af3fd43521300b0a58ef5f70fc44f6",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xa76a0E93C5af3fd43521300B0a58eF5F70fC44F6",
        "scheme": "exact"
      }
    ],
    "description": "Check whether a URL is safe to fetch, read, sign in to or pay before you do: domain age, look-alike, blocklists, HTTPS, robots.txt for your agent and the site's own x402 price.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://github.com"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "data": {
                "_shape": "data: verdict (likely_safe/caution/high_risk/inconclusive), risk_score, safe_to{fetch,read,sign_in,pay} each yes/caution/no/unknown, actions{...: {answer, why}}, reasons[{risk, why}], domain_age_days, newborn, lookalike, https_valid, robots{allowed, token, status}, http{status, content_type, redirects}, x402{offers[{price_usd, network, pay_to}]}, bot_policy, not_checked[]."
              },
              "receipt": {
                "charge_usd": 0.005,
                "rail": "x402",
                "settlement_tx": "0x…",
                "tool": "preflight"
              },
              "result": "URL pre-flight for the requested subject"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "ua": {
                      "description": "The user agent you will fetch with; robots.txt and our bot policy are judged for it. Defaults to the User-Agent of this request.",
                      "maxLength": 512,
                      "type": "string"
                    },
                    "url": {
                      "description": "The http(s) URL you are about to fetch",
                      "format": "uri",
                      "maxLength": 2000,
                      "type": "string"
                    }
                  },
                  "required": [
                    "url"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "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/v1793136692/bazaar-icons/33e0d64a881c43a7.png",
    "lastUpdated": "2026-10-27T21:37:07.635Z",
    "quality": {
      "lastCalledAt": "2026-10-27T21:31:44.339Z"
    },
    "resource": "https://how.is/v1/url/preflight",
    "serviceName": "how.is",
    "tags": [
      "url-safety",
      "fetch",
      "robots-txt",
      "phishing",
      "security"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Check whether a URL is safe to fetch, read, sign in to or pay before you do: domain age, look-alike, blocklists, HTTPS, robots.txt for your agent and the site's own x402 price."
}

What the leaf hashes

{"body":"9445e4570a9b7f0356bfc5274dc2b903d959307955c647ba1c97850a8c1af08f","id":563444,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793137725213586,"prev":null,"subject":"x402_bazaar:https://how.is/v1/url/preflight","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x73422dc1b2ebc801a480ee3108563098e997f39d19b88746a4afe51fac02c8c4
2. 0x7a989ba69527aae6fd8b4a135540c973020c7502677e63ca3a4d473533347efe
3. 0xb92a9399f49b5f7ee2c4fdc11f6af1c0cf07877fa52d3dfede139d90f4972f09
4. 0x930692a4b5a92bdd45fc7498fcb9bb013227734df017557f9dda03a41e942a9e
5. 0x2bc9d328d108884046a864d417689ca6fe08995c8c01e1746bf76141ec697172
6. 0xa81a86d9897bf782ef0fa75be607111e6ecf75177be614b8c868340dbd354f22
7. 0x7af49c04b3554c1192f27751c8c10a447eebaa59b2c22a11dac26b8ca66c0c59
8. 0xf1f9e60c70245547348987b9ea4ce144634c7948f5ae0e935cd3ab8faada75f5
9. 0xc1b05d91dcd055cd7d683a013dad2dac786b72601a5ebed78aa8b5b73d75bd07
10. 0x7f2a99b149f63aa97762c8289399ee8ed994807b28bfca51df3a659282990633
11. 0x23a51a936f60011ce90a404c26ca8b5c81a512eb324bd00dcb5ce643c0b38c8e
12. 0x8a2168d13e43e2c8b0f508ca779f90beef60501499eeab439eb7d23816a97bc4
13. 0x2926e99aefa0ff2e14a67a3ae10a7f6e753ce4b799c6fe531f8cbf8d33b31a66
14. 0xb2ae53d841a55a805fb4078b1a7d44e08a81aba4be3690bac3a5b4c366bf39da
15. 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4