Evidence row 1051822

What was observed

{
  "count": 1,
  "tools": [
    {
      "description": "Validates email syntax and MX records. x402 payment required (Base mainnet USDC).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "checkMx": {
            "description": "Look up the domain's MX records (set false to only check syntax)",
            "type": "boolean"
          },
          "emails": {
            "description": "Email addresses to validate",
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "payment": {
            "description": "x402 payment payload (base64 JSON), signed EIP-712 exact/transferWithAuthorization. Omit on the first call — the tool will return payment requirements (accepts[]) as an error result.",
            "type": "string"
          }
        },
        "required": [
          "emails"
        ],
        "type": "object"
      },
      "name": "email_validator"
    }
  ]
}

What the leaf hashes

{"body":"1e5d115d42c6c664a3cf9628f28dafa1a59498c4fa69e3cf7b3d03573c145ee7","id":1051822,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793301893862435,"prev":null,"subject":"4b98e1d9-0aff-494a-b66d-5e18e315bba2","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. 0x399a56dbec40943aae2794f296b6e674ca55c114280fabbf307903709bc239d0
2. 0x3ae946b613777bdcbac5a5ceaf76747f6ae1bc36c713cb7f439d4dde4d7605e1
3. 0x466998dfb6c604bedfdd1c4ab60e410a986904347c294e7b261adda8ebf0ad75
4. 0x93d8887078770052f64e16a9fa9ef4bdbfc5b257b406805a98b18323304c35ff
5. 0x2dc267912e926c3e0700214da58149aafe4cdfc09170f4064bc6fec93d6c7aff
6. 0x42e21917edeaa558f19aa783e5c0e47ddc593aaecc3891b09fca11b2a57b99cc
7. 0x012efa7aef2a74b4af0b066afabe6bfbe6b6ab30488f2eb9949cb8cf116f6426
8. 0x64a046f75ec808814ecffd16f2902e9537950209437f45e71c4114f060a99c92
9. 0x32c3e4d5296c407263dd131c57109c71abeb9eaea5910fbdfa6055fc2a7fcbd2
10. 0xcb8ed52989dab9f648336093523eba98c39b00817e1fcae6de77085d40d1b39c
11. 0xec762f4c2d03974f74a7f1bf16368606eb68a80f1928758498bcd47dfbc281c6
12. 0x323c003b20088ff5fc994bd02dcef5bb060fb6e3c817a34b4c86849e5240cf52
13. 0x4b7bfa7784180e2ff8d66e25e97761344643b8692c744c82acf0f77be5670a82
14. 0x14b86aca7e0af6917fa29c5b89b8f3eab1f2340a671c3d06e6ac6a34fd3a07ee
15. 0xa03bd318a195be3bd16f335c7e189443bea4f1f439087a7ac19afec9fa97f9be
16. 0x1c3764b490d23b94e5ac838c89f8d3850dedb0819196f367da2479c7a88bf2c0
17. 0xd76435ead496863d8b0bfab3434f54cd11da3c49d104fc4064b9cb3381567bbd
18. 0xd56e61af23709ed9f460471e3c08400c0142ee83e1fd9057e46350d12edf9c07

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1