Evidence row 989886

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Estimated monthly list price (USD, before tax, monthly billing) of email marketing platforms for a given number of contacts and emails per month, optionally with SMS to one destination country. Computed from a fixed table of prices collected from each vendor's official pricing page; each row has the check date, the official source URL and a status (verified/unverified). Only verified prices are used for \"cheapest\". No feature requirements are applied. Use when the user asks how much an email/newsletter or SMS marketing tool costs for their list size, or wants to compare prices between Mailchimp, Klaviyo, Brevo, MailerLite, Kit (ConvertKit), beehiiv, Substack, Omnisend, GetResponse, ActiveCampaign and HubSpot Marketing Hub.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "contacts": {
            "description": "Number of contacts/subscribers.",
            "maximum": 1000000,
            "minimum": 1,
            "type": "integer"
          },
          "emails_per_month": {
            "description": "Total emails sent per month (all contacts combined). At most 1000 per contact.",
            "maximum": 50000000,
            "minimum": 0,
            "type": "integer"
          },
          "sms_country": {
            "description": "Optional. SMS destination country (exact name from the list).",
            "enum": [
              "Afghanistan",
              "Aland Islands",
              "Albania",
              "Algeria",
              "American Samoa",
              "Andorra",
              "Anguilla",
              "Antigua And Barbuda",
              "Argentina",
              "Armenia",
              "Aruba",
              "Australia",
              "Austria",
              "Azerbaijan",
              "Bahamas",
              "Bahrain",
              "Barbados",
              "Belarus",
              "Belgium",
              "Belize",
              "Benin",
              "Bermuda",
              "Bhutan",
              "Bolivia",
              "Bonaire",
              "Bosnia and Herzegovina",
              "Botswana",
              "Brazil",
              "British Indian Ocean Territory",
              "British Virgin Islands",
              "Brunei Darussalam",
              "Bulgaria",
              "Burkina Faso",
              "Burundi",
              "Cambodia",
              "Cameroon",
              "Canada",
              "Cayman Islands",
              "Chad",
              "Chile",
              "China",
              "Christmas Island",
              "Cocos (Keeling) Islands",
              "Colombia",
              "Comoros",
              "Congo",
              "Congo Democratic Republic",
              "Cook Islands",
              "Costa Rica",
              "Cote d'Ivoire",
              "Croatia",
              "Cuba",
              "Curacao",
              "Cyprus",
              "Czech Republic",
              "Denmark",
              "Dominica",
              "Dominican Republic",
              "East Timor",
              "Ecuador",
              "Egypt",
              "El Salvador",
              "Estonia",
              "Falkland Islands (Malvinas)",
              "Faroe Islands",
              "Fiji",
              "Finland",
              "France",
              "French Guiana",
              "French Polynesia",
              "Gabon",
              "Gambia",
              "Georgia",
              "Germany",
              "Ghana",
              "Gibraltar",
              "Greece",
              "Greenland",
              "Grenada",
              "Guadeloupe",
              "Guam",
              "Guatemala",
              "Guernsey",
              "Guinea",
              "Guinea-Bissau",
              "Guyana",
              "Haiti",
              "Honduras",
              "Hong Kong",
              "Hungary",
              "Iceland",
              "India",
              "Indonesia",
              "Iraq",
              "Ireland",
              "Isle of Man",
              "Israel",
              "Italy",
              "Jamaica",
              "Japan",
              "Jersey",
              "Jordan",
              "Kazakhstan",
              "Kiribati",
              "Korea, Republic of",
              "Kosovo",
              "Kuwait",
              "Kyrgyzstan",
              "Lao People's Democratic Republic",
              "Latvia",
              "Lebanon",
              "Lesotho",
              "Liberia",
              "Libya",
              "Liechtenstein",
              "Lithuania",
              "Luxembourg",
              "Macau",
              "Macedonia, The Former Yugoslavian Republic of",
              "Madagascar",
              "Malawi",
              "Maldives",
              "Mali",
              "Malta",
              "Marshall Islands",
              "Martinique",
              "Mauritania",
              "Mauritius",
              "Mayotte",
              "Mexico",
              "Micronesia",
              "Moldova",
              "Monaco",
              "Montenegro",
              "Montserrat",
              "Morocco",
              "Mozambique",
              "Namibia",
              "Nauru",
              "Netherlands",
              "New Caledonia",
              "New Zealand",
              "Nicaragua",
              "Nigeria",
              "North Korea",
              "Northern Mariana Islands",
              "Norway",
              "Oman",
              "Pakistan",
              "Palau",
              "Palestinian Territory",
              "Panama",
              "Papua New Guinea",
              "Paraguay",
              "Peru",
              "Philippines",
              "Poland",
              "Portugal",
              "Puerto Rico",
              "Qatar",
              "Reunion",
              "Romania",
              "Rwanda",
              "Saint Barth?lemy",
              "Saint Lucia",
              "Saint Pierre and Miquelon",
              "Saint Vincent and the Grenadines",
              "Samoa",
              "San Marino",
              "Sao Tome and Principe",
              "Saudi Arabia",
              "Senegal",
              "Serbia",
              "Seychelles",
              "Sierra Leone",
              "Singapore",
              "Sint Maarten",
              "Slovakia",
              "Slovenia",
              "Solomon Islands",
              "Somalia",
              "South Africa",
              "South Sudan",
              "Spain",
              "Sri Lanka",
              "St. Kitts and Nevis",
              "Sudan",
              "Suriname",
              "Swaziland",
              "Sweden",
              "Switzerland",
              "Syrian Arab Republic",
              "Taiwan",
              "Tanzania",
              "Thailand",
              "Togo",
              "Tokelau",
              "Tonga",
              "Tunisia",
              "Turkey",
              "Turkmenistan",
              "Turks and Caicos Islands",
              "Tuvalu",
              "US Virgin Islands",
              "Uganda",
              "Ukraine",
              "United Arab Emirates",
              "United Kingdom",
              "United States of America",
              "Uruguay",
              "Vanuatu",
              "Venezuela",
              "Vietnam",
              "Wallis and Futuna Islands",
              "Western Sahara",
              "Yemen",
              "Zambia",
              "Zimbabwe"
            ],
            "type": "string"
          },
          "sms_per_month": {
            "description": "Optional. SMS messages per month (1 SMS = 1 segment). Requires sms_country when above 0.",
            "maximum": 1000000,
            "minimum": 0,
            "type": "integer"
          }
        },
        "required": [
          "contacts",
          "emails_per_month"
        ],
        "type": "object"
      },
      "name": "estimate_cost"
    },
    {
      "description": "Vendors covered by the estimate, with the date their pricing data was checked and the official pricing page URLs.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_vendors"
    }
  ]
}

What the leaf hashes

{"body":"2e0733bb96eeda8849cd15b5fc5be8dfd15c73b7aefa0e9eed801118919fe93c","id":989886,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793243684055755,"prev":null,"subject":"6edc6346-b93f-4bef-90de-234be10c4d5a","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-29 (242798 rows).

1. 0xc36f6e0d6bc5e9b7689b9103653e0f0a24a1912ba1e31f77194ef0e23a3f4abc
2. 0xfa8ca005c9d0d9a7602f2d3a998263cd972709ef32fdbb389423108172e4363d
3. 0xdb121d04cb092623a136c2d0dbeafdd297d4247f5665993be50fae9b9eb5ef03
4. 0xbdb351862507cb8751afcf7687445775c8ef6a65d847d90cbd203a10a1e35482
5. 0xcc634c72c9170b00d6724f3f9dfeb87e990ff46869126c1cc309531930489e19
6. 0xfa416a0da2f1eb39f850756d068395da75a34c0e6de6e729dcfd3039fd9635bf
7. 0x527d16307189b5c68c62dd2fa2a1b29f45b513873fd967c48873b9fc39ed1516
8. 0xa3a549fcb8703627bf15a28bcecfbe7230c27b906fb21fc753be65449b835466
9. 0xee56dea561f8b67400f8d05f5e57508f3dfeef24d3de95022b7778b4fda7bf21
10. 0xb623c96b20e68e263a61d9a02dadf36b1d88a91380c9deb77a24fc16f5b41af9
11. 0x4931624e6504e6a5c7678d65a03dcf334ee8722a9c7be5a4bc58554156ab44fa
12. 0x5cb842fc8ebd71381fe19a8881791924e752bffd68551649b2c4cbd8b2e7acfb
13. 0x82acf0ab79b727689a8862d5f40ebc054bfa26bd74148138aeb5de693084058a
14. 0x104600713bd70fcbdf137fa07f8136bb6c252c890776bc7cbd7b194271f8b93a
15. 0x4e4f8f228a3b7a38299ec6f2b1967c6cf4de15fdd9dc0d200e691266e51ef99d
16. 0xef5d5572aac8f06b61579b7167b369fcb479d9027d4037dc9cacff9e3a26ffd2
17. 0xa1fa2e97e71ad6e802f325afd74bb7095901f2060529c9739182a1233f8804bc
18. 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1