Evidence row 2794

Observed 26 Oct 2026, 14:34 UTC, by baseline/1.

Kind: listing
About: source_record agentic_market:mailcheck-hugen-tokyo
Recorded: 26 Oct 2026, 14:34 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: 2afff2e979fa94d070c05b3557ebefde70c9e82ea457ac192f5d686fb396dd70
Leaf: 0x3f9a2ab39cabfe77c12f70fcf75c924b40340891d20f3d41cb826020feddb394

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": "8",
          "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":"2afff2e979fa94d070c05b3557ebefde70c9e82ea457ac192f5d686fb396dd70","id":2794,"kind":"listing","method":"baseline/1","observed_us":1793025267275981,"prev":null,"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 2026-10-26 (296695 rows).

0x3f99f750b1f548ea1cb5c0b60a1dbc2253cfdd589afb2edd33b482495054545a
0x8ffb42bb92191e1397cccf1f2c809cffa8e6f0d1e5814061286e46837e9c7f23
0xd14b422964fa08787df1c754bd670b689c26f4779d03261d4b3d4dd56f5c6af0
0x115d6f17efa966cb566b922bc53693b5eec516f84a65fd0138e07f27eb65b3d2
0xf933a2de60457b9f0bc3e6f4de5e10035ee75859f7f928e44988d2e3d73f8601
0x73d1193de12ecd9fb66455e2f9029365eace53d0df4ca7be2914234a9a802ffb
0x39c1489b3def0e5d7a51f8cc3510061d71d513274af7016b9f128931d35a83bd
0xa22eea9f60f78575805224ea3ef91054cc83e364ef7c975924a0a6f37f2f543d
0x287b3db7ff68b7aeb7e66325fd4cb6a0c7089e8bc4a57f81b0aef69457c486de
0x3aa1f01bbb88cb01a9628a415794e8a8fba10d2a03d54c08d2e3a38ce00d02cf
0xa4d1745f134661a77f8f2bfd58422252c41790ede9f0de54979c915510f5d550
0x1afc0318a98c6dbb5a80e5cb86eba22b844e3f3b185a16f17290e29ab7410f55
0x215f432600b78f2e7c9629cd10ce6ce4b7f3351b0b71f3f2c7dcb8e650f6cd63
0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root: 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained: 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published: On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON