Evidence row 767287

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Runs one Wafermap resource and pays its exact USD price over x402, in USDG on Robinhood Chain or USDC on Base. Send a signed x402 v2 PaymentPayload in params._meta[\"x402/payment\"]; without it the tool returns isError with the payment requirements (price, networks, payTo) to sign. The work runs before the payment settles, so failed calls are never charged; a successful call returns the result plus a receipt with the transaction hash in _meta[\"x402/payment-response\"]. Agents without an x402 wallet can use the Wafermap CLI (`wafermap mcp`), which pays automatically within spending caps.",
      "inputSchema": {
        "properties": {
          "input": {
            "description": "Input object matching the resource's schema from wafermap_resource_schema, e.g. {\"network\":\"base\"}.",
            "type": "object"
          },
          "resource": {
            "description": "Resource id from wafermap_resources, e.g. \"gas-now\".",
            "type": "string"
          }
        },
        "required": [
          "resource"
        ],
        "type": "object"
      },
      "name": "wafermap_call"
    },
    {
      "description": "Searches the open x402 Bazaar index (run by Coinbase CDP) for paid APIs outside Wafermap's own catalog, such as weather, web search, data enrichment or token prices. Returns each service's URL, HTTP method, price, accepted networks, an example input and whether Wafermap can pay it (payable = accepts USDG on Robinhood Chain or USDC on Base). Use it when no Wafermap resource fits the task. Free, no payment needed.",
      "inputSchema": {
        "properties": {
          "limit": {
            "description": "How many services to return (default 10, max 20).",
            "maximum": 20,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "description": "What you need in a few words, e.g. \"weather forecast\" or \"web search\".",
            "minLength": 2,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "wafermap_discover"
    },
    {
      "description": "Returns everything needed to call one Wafermap resource: its USD price, the JSON Schema of its input, a ready-to-use example input, what it returns, and its HTTP endpoint. Use it after wafermap_resources and before wafermap_call so the input is valid (invalid input is rejected before any payment). Free, no payment needed.",
      "inputSchema": {
        "properties": {
          "id": {
            "description": "Resource id from wafermap_resources, e.g. \"stock-signal\" or \"prediction-markets\".",
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "wafermap_resource_schema"
    },
    {
      "description": "Lists Wafermap's pay-per-call resources (35 in total) with id, name, category, USD price and a one-line summary. Use it first to find the right resource id; then read its input schema with wafermap_resource_schema and run it with wafermap_call. Categories: LLMs, image generation, audio (speech and transcription), vision, web (reading and translation), on-chain data on Robinhood Chain and Base, tokenized stocks, Polymarket prediction markets and content tools. Free, no payment needed.",
      "inputSchema": {
        "properties": {
          "category": {
            "description": "Optional category filter.",
            "enum": [
              "llm",
              "image",
              "audio",
              "vision",
              "web",
              "onchain",
              "stocks",
              "prediction",
              "content"
            ],
            "type": "string"
          },
          "query": {
            "description": "Optional words to match against the id, name, summary and tags, e.g. \"stock\", \"image\", \"polymarket\". Omit to list everything.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "wafermap_resources"
    },
    {
      "description": "Lists the tokens a Wafermap wallet can swap through the KyberSwap aggregator on one network, with symbol, name and contract address. On Robinhood Chain this includes ETH, WETH, USDG and every Robinhood stock token (TSLA, NVDA, AAPL…); on Base it includes ETH, WETH and USDC. Use it to resolve a ticker to its contract address before quoting or executing a swap with the Wafermap CLI. Read-only and free; it does not trade.",
      "inputSchema": {
        "properties": {
          "network": {
            "description": "Which chain's tokens to list. Defaults to robinhood.",
            "enum": [
              "robinhood",
              "base"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "wafermap_tokens"
    }
  ]
}

What the leaf hashes

{"body":"a78e9de96f1e6fa930e1861dd3ffc162514bd6e1d6599a93c3f368a0910ff9a2","id":767287,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793181044946079,"prev":null,"subject":"20067acd-811e-4847-82a6-726a7374cb64","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-28 (231336 rows).

1. 0x44a13d43173324bb15ae156eade865e683ea88df576bf4398756f13cffc1d6b3
2. 0x472fe0df91886df46c269249e83236a46273cc1e483af52455fbc8cca4167c91
3. 0x7cdaa6a8d66e503dfd8891462f81432e92980dc4ee35b92a112c7c135a55c70c
4. 0x1d2421f70b26c8f84a224e93730113d643cc967ff07d1d43e558b7454d611194
5. 0x2cafa2846dd9545d5f44093908ea0fcc7902d9f2308ed480eed2bf522e791c5d
6. 0x42f5f5d10594263c4242746589ecc2fb7dac57c3047fde7fdbbdbf91f8ce40ae
7. 0x1a9182adf186af8afb82c44936494cb1cc3073270dae316a56d630a370514351
8. 0xe6fd2392b475dfc63e13f630229a329b3af4cae5c2aafb33421ded1fb34ac949
9. 0xb1f3bfe1b7f3bc239c18c8398ec1aae40683ace17a51d71a52edb1e414426ce8
10. 0x447ee924fc3937577c902023987c76e2d3510a57be18b4bc34e9f17f818aeefc
11. 0xf5bbb3981c7afb6155f8ffa5a399a195201cde35c840b5435ea115c80a06a1f7
12. 0xa42f0d8f627149b7cdfb8ff4d65d4c18f851578f3c6cd50a33767f225a232830
13. 0x61139ad7d606f7313043f7df1dce650b88fec9b3f4115099388cfb12e3b2c33d
14. 0xb8468b110fdd4b1ba83cf25249a313b6361839956c4e0f61b3f3edfce5fe58d8
15. 0x91690f98682e078d41b8b72edeaea70473545a876fc3baa645fc988225096386
16. 0xaeb1503e5d0d358b256ba97a10178c357ddb8f55cc961925ccf0458aae5ebcae
17. 0xf078ea7d84d98dbeffed23d8e67b36751e60464ffd4cfdc005e0aa6f8cb9b459
18. 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae