Evidence row 563445

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://how.is/v1/read"
    ]
  ],
  "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": "Read a web page as clean markdown, with a safety verdict attached: robots.txt honored for your agent, risky sites flagged as untrusted, optional screenshot.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://github.com"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "data": {
                "_shape": "data: markdown, title, description, lang, canonical, final_url, http_status, content_type, words, truncated, untrusted_content, preflight{verdict, safe_to, reasons, ...}, screenshot{image_base64, ...} when asked."
              },
              "receipt": {
                "charge_usd": 0.005,
                "rail": "x402",
                "settlement_tx": "0x…",
                "tool": "read"
              },
              "result": "Read a page (with verdict) 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": {
                    "screenshot": {
                      "description": "Also return a 1280x800 JPEG of the page",
                      "type": "boolean"
                    },
                    "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) page to read",
                      "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": "2026-10-27T21:36:57.643Z",
    "quality": {
      "lastCalledAt": "2026-10-27T21:36:57.643Z"
    },
    "resource": "https://how.is/v1/read",
    "serviceName": "how.is",
    "tags": [
      "markdown",
      "web-scraping",
      "fetch",
      "url-safety",
      "content-extraction"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Read a web page as clean markdown, with a safety verdict attached: robots.txt honored for your agent, risky sites flagged as untrusted, optional screenshot."
}

What the leaf hashes

{"body":"25369a030e527dd004bc367772ecc35dd997ef25edc09ca91b61b4cd83164c88","id":563445,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793137725216447,"prev":null,"subject":"x402_bazaar:https://how.is/v1/read","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. 0x08cd878f99653c9cf7c4a54a314c7385e902535f7d1f2ade35a054a5bdf784da
2. 0x888f030d0e0c79527af8573a528986824e524ab712a6d6e6ac70c43d6af8bcf6
3. 0x9fe3068689f5bae9820ea999e0e81f8f687ec84aa646f518e529dd091082c097
4. 0xd10f90ecec9f4c4580c9590958916b8e63af5b36a6f2546cc8dbc5557e3d7640
5. 0xabdbae0af98e3afb22697140ff001b24312acaa1889490d6bc7ee89270418b74
6. 0x5141c123d347eda56144181f6aeef124b3235a3bbcda228bf3cbbc2a0430021b
7. 0xed36db0de8a6c4116ba999c94fee76b37cb33df3c16cae858ebf7ca29dd7b9fc
8. 0x0a3c76d49b3c9659a187a40864a2153125f159822824ff37500a88e42a200a99
9. 0x6efb43516c0ac6ecdc2a00f417064dcd3e762f3348c81e6186bdfc79ee1ea248
10. 0x03a267c1d5dd59638952aa8136811d4a60156d91df81c76225e7c18da2c0d981
11. 0x9ae71f62703c0a9df6ffd13f49569896ffbb72240a66e3d44cdbfbe65f98ac1c
12. 0x032ecda033bf8a986e559148b1dda067c67bf4dee01f0000782b450c72286406
13. 0x74ffd6144e8464591ea30392b981f197426cfd361178829fb8a66915e2f727b0
14. 0x3e0ec8a2a8a954695a9b53a4a48a7656d7e3fd6a8795c73b49e2ef05b201ec3f
15. 0x2cf27e8a181d60d0dd27c186c2eddfcbb4e8fa71cf66feeb55a4d730e15ee8c4
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4