Evidence row 524784

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://offercheck.offercheck.workers.dev/v1/check/url"
    ],
    [
      "x402",
      "https://offercheck.offercheck.workers.dev/v1/fx"
    ],
    [
      "x402",
      "https://offercheck.offercheck.workers.dev/v1/price"
    ],
    [
      "x402",
      "https://offercheck.offercheck.workers.dev/v1/read"
    ],
    [
      "x402",
      "https://offercheck.offercheck.workers.dev/v1/verify/offer"
    ]
  ],
  "name": "offercheck.offercheck.workers.dev",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "offercheck.offercheck.workers.dev",
    "endpoints": [
      {
        "description": "Check a URL before you cite, visit or trust it: liveness, final URL and redirect chain, soft-404 detection, page title, domain registration age (RDAP), robots.txt policy for AI agents, and Wayback Machine snapshot availability. $0.002 per check.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "https://example.com/docs/page",
            "group": "query",
            "name": "url",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "9",
          "l30DaysUniquePayers": "4"
        },
        "serviceName": "offercheck",
        "tags": [
          "verification",
          "ecommerce",
          "price",
          "availability",
          "url"
        ],
        "url": "https://offercheck.offercheck.workers.dev/v1/check/url"
      },
      {
        "description": "Convert between 30 major currencies (USD, EUR, GBP, JPY, CHF, CNY, INR, ILS, AUD, CAD, ...) using the European Central Bank's daily reference rates: rate and converted amount for one or many target currencies, optional historical date back to 1999. Returns the ECB rate date and source. $0.002 per call.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "100",
            "group": "query",
            "name": "amount",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "USD",
            "group": "query",
            "name": "from",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "EUR,GBP",
            "group": "query",
            "name": "to",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "12",
          "l30DaysUniquePayers": "8"
        },
        "serviceName": "offercheck",
        "tags": [
          "finance",
          "fx",
          "exchange-rate",
          "currency",
          "crypto"
        ],
        "url": "https://offercheck.offercheck.workers.dev/v1/fx"
      },
      {
        "description": "Current prices for cryptocurrencies and tokens by symbol (btc, eth, sol, usdc, ...), CoinGecko slug, or on-chain token address on Base, Ethereum, Arbitrum, Solana and 100+ chains, using DeFiLlama's aggregated DEX/CEX pricing with a per-asset confidence score. Quote in USD or any ECB fiat currency. Up to 25 assets per call. $0.002 per call.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "btc,eth,base:0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "group": "query",
            "name": "ids",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "USD",
            "group": "query",
            "name": "vs",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "10",
          "l30DaysUniquePayers": "6"
        },
        "serviceName": "offercheck",
        "tags": [
          "finance",
          "fx",
          "exchange-rate",
          "currency",
          "crypto"
        ],
        "url": "https://offercheck.offercheck.workers.dev/v1/price"
      },
      {
        "description": "Read any public web page as clean Markdown: main-content extraction (navigation, footers, scripts and hidden elements removed), headings, lists, tables, code blocks, links (absolute, deduplicated), images, plus title, description, canonical URL, language, author and publish date, and a content hash + fetch time as evidence. JSON and plain-text URLs are returned as-is. No JavaScript rendering. $0.001 per page.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "https://example.com/blog/post",
            "group": "query",
            "name": "url",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.001",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "29",
          "l30DaysUniquePayers": "11"
        },
        "serviceName": "offercheck",
        "tags": [
          "web",
          "read",
          "markdown",
          "scrape",
          "extract"
        ],
        "url": "https://offercheck.offercheck.workers.dev/v1/read"
      },
      {
        "description": "Verify the live price and availability of a product at a URL before you buy or quote it. Fetches the page now, extracts price/currency/availability from JSON-LD, Shopify JSON, OpenGraph or microdata, and returns evidence (method, snippet, content hash, fetch time) plus a confidence score. $0.01 per check.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "https://shop.example.com/products/widget",
            "group": "query",
            "name": "url",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "8",
          "l30DaysUniquePayers": "4"
        },
        "serviceName": "offercheck",
        "tags": [
          "verification",
          "ecommerce",
          "price",
          "availability",
          "url"
        ],
        "url": "https://offercheck.offercheck.workers.dev/v1/verify/offer"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "offercheck-offercheck-workers-dev",
    "integrationType": "",
    "isNew": false,
    "name": "offercheck.offercheck.workers.dev",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.0034",
      "currency": "USDC",
      "maxAmount": "0.01",
      "minAmount": "0.001"
    },
    "provider": "offercheck.offercheck.workers.dev",
    "providerUrl": "",
    "serviceName": "offercheck",
    "tags": [
      "verification",
      "ecommerce",
      "price",
      "availability",
      "url",
      "finance",
      "fx",
      "exchange-rate",
      "currency",
      "crypto",
      "web",
      "read",
      "markdown",
      "scrape",
      "extract"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"f7a4aec280373ca785b550216a900717586362559ea0996686a5ea2fbb0bbac5","id":524784,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793124743172682,"prev":277814,"subject":"agentic_market:offercheck-offercheck-workers-dev","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. 0xa71a5573a03bdde29917a7d097ee78f68b3935bfd02e2831bef55971bc299e81
2. 0xd260429a734ac0b5ef23f47be062c190588bceb028de93cdb1fa7133727b1cc7
3. 0xcb0ed3823ea7b20b777d83cee64adc62fb7e60366877056b7394c5a147855dd3
4. 0x79f37f3a00bda77a99238f5a311b1337c934d2aebfaa6047dfda01b12c92b7ac
5. 0xb1c9e35fd8edc4604ea31c6aad6db9e1cc60dd41314017f0f6fbc23caff2a738
6. 0xb6749de76771d31855b39a67d468e1ee5873fd67ecfe3ca7640f47b508eb4ba2
7. 0x6db06d57899fe4e94cf17cd2b74da0748bb1972aad50694877d8b052f7c26736
8. 0xfae55182670a6df5148f24e279d8cd1264a58bdebecbd381382eed94c0bf6a64
9. 0xbf644afcd65ef59d78cd2b99f995c73ca6700947526b8ca2d3efca372b93a609
10. 0x6986b0851092f530a4bbecb8484630cf7a39e27856758aa06d718f8b98f13d1b
11. 0x84d44ad9f2c04577b96d73f7fdc6010e8b93e5b318136ae9ea601cf365fad041
12. 0x98f564dcc2f0d0fd67cbc3a17211687e12a4becc9b9c47ef78c02ff7431b734a
13. 0xb37156a04839055daed26674da38864f8dae598cab9742c6fb3e74eb3178f2d4
14. 0x0644f7e2a4b5bf9b66f185cc3fbb766d456ad94490183852f4c6db5855114cc5
15. 0xa3fff4662cd48659f5bafd0612931759a90e53a7b4209ed8f26f6594a07bb547
16. 0x64c405a28e8819716221eb2529fe4ce277ab08025e17e685cbd5ece75ceb75c7
17. 0xf30fddbf4811226c58e8f0daf36fddd79fc5f1356b592bb1d99a8061ddbabe66
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4