Evidence row 1505413

What was observed

{
  "count": 8,
  "tools": [
    {
      "description": "Live peg-health verdict for USD stablecoins: PEGGED / WATCH / DEPEG_RISK / DEPEGGED, 0-100 risk score, price deviation in bps, 1d/7d/30d supply change and per-chain liquidity, computed from DefiLlama (cached 5 min). Free tier: 30 calls/hour per client; for unlimited use pay per call via x402 (USDC on Base, $0.005): https://identifier-validator-api.yuechenxi-importexport.workers.dev/x402/v1/stablecoin-peg. Informational only, not financial advice.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "asset": {
            "description": "USD stablecoin symbol, name, DefiLlama id or CoinGecko id, e.g. USDC. Up to 10 comma-separated.",
            "type": "string"
          },
          "chain": {
            "description": "Optional chain name (e.g. Base) to add on-chain supply/liquidity checks.",
            "type": "string"
          }
        },
        "required": [
          "asset"
        ],
        "type": "object"
      },
      "name": "stablecoin_peg_verdict"
    },
    {
      "description": "Validate up to 25 mixed identifiers (iban, bic, vat, card, isbn, gtin) in one call.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "items": {
            "items": {
              "properties": {
                "country": {
                  "type": "string"
                },
                "type": {
                  "enum": [
                    "iban",
                    "bic",
                    "vat",
                    "card",
                    "isbn",
                    "gtin"
                  ],
                  "type": "string"
                },
                "value": {
                  "type": "string"
                }
              },
              "required": [
                "type",
                "value"
              ],
              "type": "object"
            },
            "maxItems": 25,
            "type": "array"
          }
        },
        "required": [
          "items"
        ],
        "type": "object"
      },
      "name": "validate_batch"
    },
    {
      "description": "Validate a BIC/SWIFT code structure (8 or 11 chars), country, location and branch code.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "bic": {
            "description": "The BIC/SWIFT code. e.g. DEUTDEFF",
            "type": "string"
          }
        },
        "required": [
          "bic"
        ],
        "type": "object"
      },
      "name": "validate_bic"
    },
    {
      "description": "Luhn check and network detection (Visa, Mastercard, Amex, Discover, Diners, JCB, UnionPay, Maestro, Mir). Returns masked output only; nothing is stored.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "number": {
            "description": "The card number (use test numbers). e.g. 4111111111111111",
            "type": "string"
          }
        },
        "required": [
          "number"
        ],
        "type": "object"
      },
      "name": "validate_card"
    },
    {
      "description": "Validate GTIN-8/12/13/14 (EAN/UPC barcode) check digit.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "code": {
            "description": "The barcode digits. e.g. 4006381333931",
            "type": "string"
          }
        },
        "required": [
          "code"
        ],
        "type": "object"
      },
      "name": "validate_gtin"
    },
    {
      "description": "Validate an IBAN offline: country rules, length, BBAN structure, mod-97 checksum. Returns validity, country, SEPA flag and formatted IBAN. Structural check only: cannot tell whether the account exists.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "iban": {
            "description": "The IBAN, spaces allowed. e.g. DE89370400440532013000",
            "type": "string"
          }
        },
        "required": [
          "iban"
        ],
        "type": "object"
      },
      "name": "validate_iban"
    },
    {
      "description": "Validate ISBN-10 or ISBN-13 check digit and convert between the two.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "isbn": {
            "description": "The ISBN. e.g. 9780306406157",
            "type": "string"
          }
        },
        "required": [
          "isbn"
        ],
        "type": "object"
      },
      "name": "validate_isbn"
    },
    {
      "description": "Validate an EU/EEA (plus GB, NO, CH and more) VAT number format and checksum offline. Does not check VIES registration status.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "country": {
            "description": "Optional ISO country code if the number has no prefix.",
            "type": "string"
          },
          "vat": {
            "description": "The VAT number, with or without country prefix. e.g. DE811569869",
            "type": "string"
          }
        },
        "required": [
          "vat"
        ],
        "type": "object"
      },
      "name": "validate_vat"
    }
  ]
}

What the leaf hashes

{"body":"79bbfa961683d00e84d5dd091f18ac8d5a3db1053d8e8fd5d82771c7d6833320","id":1505413,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793472359363830,"prev":null,"subject":"9b4e81e0-3fe6-4029-aab1-924794c6e508","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-31 (246033 rows).

1. 0xa2f3a220ac371d3b005efbb2df072634d88232ce9e787af5cd74fb10c4ee0afb
2. 0x9353db62481e16a82469d9b21cd090dced7e67ca25b4d32521e3be5286e3f47f
3. 0x8abaad931ec74c310f8d6499d6a50a7ecde0a4d7a1c3e7780e5ef8b82f798eb4
4. 0xf4bf71d38ce39ead28c32371bc0be0007486f534cd693225d4cad33e76ddad5d
5. 0x8a956969dcf0396ac61a89be1afc7c484c5f3eff2ea23a9d9c28890d8f791bbc
6. 0xd8341938e496bafd2d6fb0d9886161e83a8fd28ad2caefc7d057108b6d588801
7. 0x0b4b68d356f476708d37edb0c51ef5c229b9e20871b874eac55e0f1d65d1a9e0
8. 0xa2d466c064c7dac337a42aa9968215f7a64ebab540cdc3974cda1c8fc6c180dd
9. 0x0821716bad554fbfea9e28c25304469e1c6a6e3f4ccb3a80b58e3fbc0edade3e
10. 0x9722e738cbc62b09cccc15b765706f4ffb61a04f53786d06400995e9cc6d796f
11. 0x8c6b9ed19088b4cce7206e0cf1e0d2a88971d3e5f08c2965051e864dd188ece5
12. 0x793e109e24366900ed525fd6441b8679bd8e0f90728d544dacac6ad8639f385f
13. 0xbb0d6a5ef6d4a77fc1050819b844be89ee9cf38eab6c5c080e1d03a1935ecfc3
14. 0xfc4e63034c3e47c4cc19a85dbacdb421762119a58090dfe0c71e13f11f75db19
15. 0xaada757a4e58b5424e31228ed7c84f378168cc321ac8ae3a78bfc8096bcc0324
16. 0x8605635b6c6bd33c6547585212170cc076018c2dd5f81f35a5ac4ade689fbb12
17. 0x50003b3c3045b653f8be4232e95e80582cf5c54c14c509ba0a9a197b9e5005cb
18. 0x0504a25438f3c7932125463198ca74c5064f23f71a5c92763b3fc96a98cc8b57

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0