Evidence row 564246

What was observed

{
  "count": 15,
  "tools": [
    {
      "description": "Cancel an active shopping cart session by cart_id. Example: cancel_cart(cart_id='cart_1')",
      "inputSchema": {
        "properties": {
          "cart_id": {
            "description": "Shopping cart identifier to cancel.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "cancel_cart"
    },
    {
      "description": "Cancel an uncommitted checkout session by checkout_id. Example: cancel_checkout(checkout_id='chk_1')",
      "inputSchema": {
        "properties": {
          "checkout_id": {
            "description": "Checkout session identifier to cancel.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "cancel_checkout"
    },
    {
      "description": "Finalize checkout settlement via Base USDC x402 or Stripe MPP. Example: complete_checkout(checkout_id='chk_1')",
      "inputSchema": {
        "properties": {
          "checkout_id": {
            "description": "Checkout session identifier.",
            "type": "string"
          },
          "payment_data": {
            "description": "Signed payment proof or token payload.",
            "type": "object"
          }
        },
        "type": "object"
      },
      "name": "complete_checkout"
    },
    {
      "description": "Create a new shopping cart with initial line items. Example: create_cart(line_items=['agd-pass-2000'])",
      "inputSchema": {
        "properties": {
          "line_items": {
            "description": "Line items to place in the cart.",
            "type": "array"
          }
        },
        "type": "object"
      },
      "name": "create_cart"
    },
    {
      "description": "Create a UCP checkout session for API passes or credits. Example: create_checkout(line_items=['agd-pass-2000'])",
      "inputSchema": {
        "properties": {
          "buyer": {
            "description": "Optional buyer contact details.",
            "type": "object"
          },
          "line_items": {
            "description": "Line items for checkout.",
            "type": "array"
          }
        },
        "type": "object"
      },
      "name": "create_checkout"
    },
    {
      "description": "Retrieve current shopping cart items and totals by cart_id. Example: get_cart(cart_id='cart_1')",
      "inputSchema": {
        "properties": {
          "cart_id": {
            "description": "Shopping cart identifier.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_cart"
    },
    {
      "description": "Retrieve checkout session status and totals by checkout_id. Example: get_checkout(checkout_id='chk_1')",
      "inputSchema": {
        "properties": {
          "checkout_id": {
            "description": "Checkout session identifier.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_checkout"
    },
    {
      "description": "Retrieve fulfilled order receipt and API pass key by order_id. Example: get_order(order_id='ord_1')",
      "inputSchema": {
        "properties": {
          "order_id": {
            "description": "Completed order identifier.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_order"
    },
    {
      "description": "Retrieve full product or API pass metadata by product_id. Example: get_product(product_id='agd-pass-2000')",
      "inputSchema": {
        "properties": {
          "catalog": {
            "description": "Optional catalog context.",
            "type": "object"
          },
          "product_id": {
            "description": "Target product identifier.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_product"
    },
    {
      "description": "Retrieve product pricing and variant IDs by product_id. Example: get_product_details(product_id='agd-pass-2000')",
      "inputSchema": {
        "properties": {
          "product_id": {
            "description": "Product identifier to inspect.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "get_product_details"
    },
    {
      "description": "Batch lookup catalog items by product identifier list. Example: lookup_catalog(ids=['agd-pass-2000'])",
      "inputSchema": {
        "properties": {
          "catalog": {
            "description": "Optional catalog context.",
            "type": "object"
          },
          "ids": {
            "description": "Product identifiers to retrieve.",
            "items": {
              "type": "string"
            },
            "type": "array"
          }
        },
        "type": "object"
      },
      "name": "lookup_catalog"
    },
    {
      "description": "Search the UCP product and API credit catalog by keyword. Example: search_catalog(query='pass')",
      "inputSchema": {
        "properties": {
          "catalog": {
            "description": "Optional catalog scope filter.",
            "type": "object"
          },
          "query": {
            "description": "Search keyword or capability filter.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_catalog"
    },
    {
      "description": "Search store privacy, refund, terms of service, and SLA policies. Example: search_shop_policies_and_faqs(query='refund')",
      "inputSchema": {
        "properties": {
          "query": {
            "description": "Policy topic or question keyword.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_shop_policies_and_faqs"
    },
    {
      "description": "Update line item quantities in an active shopping cart. Example: update_cart(cart_id='cart_1', line_items=[])",
      "inputSchema": {
        "properties": {
          "cart_id": {
            "description": "Shopping cart identifier.",
            "type": "string"
          },
          "line_items": {
            "description": "Updated cart line items.",
            "type": "array"
          }
        },
        "type": "object"
      },
      "name": "update_cart"
    },
    {
      "description": "Update buyer or payment rail details on a checkout session. Example: update_checkout(checkout_id='chk_1')",
      "inputSchema": {
        "properties": {
          "checkout_id": {
            "description": "Checkout session identifier.",
            "type": "string"
          },
          "payment": {
            "description": "Selected payment method configuration.",
            "type": "object"
          }
        },
        "type": "object"
      },
      "name": "update_checkout"
    }
  ]
}

What the leaf hashes

{"body":"e655a9298517eb195f99681cb2b68c60638c9d40cf5feb04d6a813602d59a1b6","id":564246,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793137781590216,"prev":null,"subject":"ef5eb27f-a254-42f8-9714-bddd4f894794","subject_kind":"endpoint"}

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. 0x6b892e8915ee66890fac61244274d84ad44a284022a463f0f7fd6e1de786c6e1
2. 0xaeec874b8167587321e9860c14a8f796ad125dafab9626fa160705663d7249ff
3. 0xacb6242e96db8803eb4555bf89c1aa5dadf3ee915820c095365d273614bac17c
4. 0xf81d936b6b1b1185f6362ae4c1cb9f8bb21f5f9711d9fad7922b20d4186ac360
5. 0x29bd3df7d3c3cf80356ff60d5b59216d605ab92e6f72242a3cf10127181b0db4
6. 0xdc56d410cdacaf2de9877087b8f719bac6df5978da969ae42c932ba260c6b282
7. 0x1473b647c6e4ca3f6a4fd2c98f7168f559aa8bdb25dfb4ede3886b1de57e6b3e
8. 0x1577532ddf529050cb164363ad2e532aed8d7fb0b3f43b85e9683c54a63375b6
9. 0x4123ca37006d33e406a46c1cac51be883d0d68fc8eb4d0c98455ace0144f44c3
10. 0xc0de6a748e789906f53a9948fbd08624fafeb0614506dc1c1e4ad9f30452f381
11. 0xdc9ca5cffc0291f8ddf9255389acf7653056f9ad5b5eee5581f407185fc803d1
12. 0x1907258a29a881c6f59707e890e9f73f7aff1ace32101f20e208f76e9fac9a60
13. 0x927616fada4e04588c09f6e02e8f6e3a1351bac8355e394da3bd0bf249a5c503
14. 0x3c5462812bd2f841e3d7deefc01555f18262fe5e0d5a7eb155330b7a7cb0388e
15. 0x6f00f0da417f4126951ba8ba9b7962c847e91f5c61364ad9ad47e5f979698a60
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4