Evidence row 284097

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://quantagentshop.com/v1/page-change"
    ]
  ],
  "name": "Quant Agent Shop",
  "owner_address": "0x4d8d8d4f04512029172e0176744eec4ae5238309",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0x4d8d8D4f04512029172e0176744Eec4AE5238309",
        "scheme": "exact"
      }
    ],
    "description": "Page change check. Send a public URL and, optionally, the hash from your last check; returns the SHA-256 of the page's main text (scripts, navigation and spacing ignored) and changed true or false. Nothing is stored here; keep the hash yourself. Use to watch a page cheaply, up to 10 checks of a host a minute. Dates or counters in the text count as changes. To read the page use /v1/fetch-page. Typical response under 2 s. Failed calls are not charged.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "previous_sha256": "6f48ad30e4cc6be7e1a342177e2b549bc1ca7cbe7b903dd38a92eaf6a829b5ac",
              "url": "https://www.x402.org/"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "changed": true,
              "chars": 1790,
              "checked_at": "2026-10-22T09:00:00+00:00",
              "final_url": "https://www.x402.org/",
              "previous_sha256": "6f48ad30e4cc6be7e1a342177e2b549bc1ca7cbe7b903dd38a92eaf6a829b5ac",
              "sha256": "b5eda501c7113cf9b4dcc2955682c8c51d31d605cee98eb6971f28277ca0d646",
              "title": "x402",
              "url": "https://www.x402.org/"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "previous_sha256": {
                      "anyOf": [
                        {
                          "pattern": "^[0-9a-fA-F]{64}$",
                          "type": "string"
                        },
                        {
                          "type": "null"
                        }
                      ],
                      "default": null,
                      "description": "The sha256 from your last check, to compare against.",
                      "title": "Previous Sha256"
                    },
                    "url": {
                      "description": "Public http or https page to hash.",
                      "format": "uri",
                      "maxLength": 2083,
                      "minLength": 1,
                      "title": "Url",
                      "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"
        }
      }
    },
    "lastUpdated": "2026-10-26T18:54:59.577Z",
    "quality": {
      "lastCalledAt": "2026-10-26T18:43:30.235Z"
    },
    "resource": "https://quantagentshop.com/v1/page-change",
    "serviceName": "Quant Agent Shop",
    "tags": [
      "web-search",
      "web-scraping",
      "company-data",
      "research",
      "compliance"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Page change check. Send a public URL and, optionally, the hash from your last check; returns the SHA-256 of the page's main text (scripts, navigation and spacing ignored) and changed true or false. Nothing is stored here; keep the hash yourself. Use to watch a page cheaply, up to 10 checks of a host a minute. Dates or counters in the text count as changes. To read the page use /v1/fetch-page. Typical response under 2 s. Failed calls are not charged."
}

What the leaf hashes

{"body":"fdf5c67fa7feca597fabc4eebe14ae65c36a8e8aa73c7354754599eea6dedab0","id":284097,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793043164749771,"prev":null,"subject":"x402_bazaar:https://quantagentshop.com/v1/page-change","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x8ddaac6cc5cd343276d28f656ab34d0bc8e6f2811eabe8388fd30b6189b434ee
2. 0xeb755c9c7ac15ee7057e745ed7298274c93f1a9f4c487413c4fbbeaaae612e6e
3. 0xecda5be1a3564f0d5cb7dada1a8c8d5b8e0bf6c86329759987f7190e0caf8451
4. 0x9197a58c5e20be947a47b97d69b8829705deefd97093f7864b63be1909c82431
5. 0x972d71ec4e0a346e81950399978b09f205c50cbdc07da30b168d8207d957e13c
6. 0x57e7547e76680a92de8a8308df6f3110530d285246450eb9c3c76051925c641e
7. 0xc1258b03912e4c08302f82fce7a430d2b2d4fb84ba78f66a15ff13c8f5fc9beb
8. 0xec2c45338731519906eda1b1433e0ec120949dc1a57517af1a59e25ff2f07242
9. 0x8c4ff1cbe582f339c42398efe692723d46d9d38dd3214e5662bf7395301d2e74
10. 0xcd309087e391a4bbf7ab28b9f7073de601c743989827ee9f4afe481b1c005fc6
11. 0x6880847de0a4b4b8c14408244df84ff11ac20d4049a575846d0700a7a91132ca
12. 0x59a4efa65a01e4e2abdb3b8b7bb673db6d1c72e0f9d52dd2f94777b14a5b061c
13. 0xc0cb184c9bdf71abcf18fda97bd59289153d120dbf8fee9f517b63bf303deb95
14. 0xf0edabbb9ba0d643e5505d19d07637eb6f6aed0a1c7356af43ae7d84ae9ef0c5
15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae