Evidence row 527392

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://mailcheck.hugen.tokyo/mailcheck/disposable"
    ],
    [
      "x402",
      "https://mailcheck.hugen.tokyo/mailcheck/mx"
    ],
    [
      "x402",
      "https://mailcheck.hugen.tokyo/mailcheck/validate"
    ]
  ],
  "name": "mailcheck.hugen.tokyo",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453",
      "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
    ],
    "category": "",
    "description": "",
    "domain": "mailcheck.hugen.tokyo",
    "endpoints": [
      {
        "description": "Instant disposable email detection — checks against 5,000+ known temporary email domains (Guerrilla Mail, Mailinator, Temp Mail, 10MinuteMail, and more). Returns boolean result. Maintaining this blocklist yourself requires weekly updates from multiple sources. Accepts USDC payments on Base and Solana",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "guerrillamail.com",
            "group": "query",
            "name": "domain",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://mailcheck.hugen.tokyo/mailcheck/disposable"
      },
      {
        "description": "MX record lookup for any domain — returns whether mail servers exist and their hostnames sorted by priority. Verify email deliverability before sending. Supports all TLDs including ccTLDs and new gTLDs. No DNS library setup needed. Accepts USDC payments on Base and Solana",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "gmail.com",
            "group": "query",
            "name": "domain",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://mailcheck.hugen.tokyo/mailcheck/mx"
      },
      {
        "description": "6 email validation checks in one call — syntax (RFC 5322), MX record verification, disposable detection (5,000+ domains), free provider identification, role-based address detection (admin@, info@), and typo suggestion. Returns a 0-1 confidence score with detailed per-check results. POST method protects email addresses from access logs. No API keys, no multiple service integrations needed. Accepts USDC payments on Base and Solana",
        "method": "POST",
        "parameters": [],
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "7",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://mailcheck.hugen.tokyo/mailcheck/validate"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "mailcheck-hugen-tokyo",
    "integrationType": "",
    "isNew": false,
    "name": "mailcheck.hugen.tokyo",
    "networks": [
      "Base",
      "solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.01",
      "currency": "USDC",
      "maxAmount": "0.01",
      "minAmount": "0.01"
    },
    "provider": "mailcheck.hugen.tokyo",
    "providerUrl": "",
    "serviceName": "",
    "tags": []
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"b7ed84519b572ed256c4f0c6c9ed7c8c1961c9d52026bd4097e7b6ae8cbd833d","id":527392,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793124811644051,"prev":2794,"subject":"agentic_market:mailcheck-hugen-tokyo","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. 0x100a4b672011bf16b1f9c122516e1fa59d8aa4cda007d2bfb4dbe664a6c12d46
2. 0xd1664b257a2bb4a35c3f5b599acb462aa4a58f913b148ed1b4086e76de75e39d
3. 0xa24b62cf2960b51aefb52d8938d5089210ee54a5fd544300ad4d7ab54ba19936
4. 0xeb8a7b75874d021eb6301ddd6ca0630c30ff340ce4c0a777c7326be03910c6ee
5. 0xaf8e539e2948e23bb8bacacf12a3aa49c5ae099bf8cfd6f27ceb3bdb16b30e22
6. 0xa2e0b240ff707253f6c53c220b8309adca0278c36eb4e14f86cc0ca631ef5e75
7. 0xf749ee1ee25ba045fa44d72aecfdc3285d4b3ed8fa4a5e32e759c12b2b1e6d0a
8. 0xeace5d065751e61d211212e0aa47b77017f1ec01bec5e37d9050fdf871a7d294
9. 0xddf6f7db36ca9d340ef5022540e9743961c26cfe7fe7d33e745f1c198a1e2109
10. 0xe1615fecd4fa00bce6ae4a8c131c30bdffbd1f0af30622f2a9574bdc33b3b850
11. 0x8ac2fe99f9dd601ab64a254bbaed16deea227866f6b921e1bd7aaefef2e05b53
12. 0x0d3ea2b5e8eb21cf4cb25a0567ff70340d50d07631267f35ddfc7cd1de74eea5
13. 0xedf6ab3c3733ce137d888d3e5f7006ba77ab04b8f1fe576519f7b056959665ee
14. 0x52c5141da0cbee106a30396ee7d1360fd22f55084aca2ca436c8007892775670
15. 0x6913cb48392acb8dc5c940dcdb6e6fc889d544f85dff11da249551a5f027e688
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4