Evidence row 813665

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 Solana, Base, Arbitrum or Polygon. 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 Solana, Base, Arbitrum or Polygon). 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":"dfcde0cb9a2d89db6f8fc3ba98eabc17a708d3ba7d7492cb8061e866457fe857","id":813665,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793228520606037,"prev":767287,"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. 0x4baaa1ad31cf99c9395b2c42b88db03d9c1ee0e34608bb407fa04e09c216ad0e
2. 0x7c9fbf626117b853cb4b918dba486d5000506e33bc4287efb1d06ab339cc18d7
3. 0x7baf360446e6918cb43621e69f4e5b2863f1b4cf25e58b2aff12f98da0cb904b
4. 0xcd59c8b22afca48fd4d775bbffdba16ede3814d9adbe766914396cfea2a5c9c5
5. 0x481f0bbb673dbd3ab60aab14f9a7fdccdedcbafeceaf495c709191d744b8e926
6. 0x099ce4bd1761fc871acb9907bcb837ed850fa4e60643fd3a4f6a2c10df04297e
7. 0xbb8724200c4a315dee3d0972ef418f553a0f73af9f104227ba5ca3cebf0143ec
8. 0xfd7803e23aa5fac0798abd42f601d4ed38d3d7faba8deebf7c9cd2c5180a9048
9. 0x813b498ece6347f3d90b366a7595c38d249e2f985e1b7839cbe95356d13201c5
10. 0xe80d5e9ef49aa8f598cbc5bf4b2fba1b79bdd3719117b9d1860ec319274d5cf4
11. 0x194985fb3c20309a44f502702ddc4a9da274d437ff5429aeccfd64708b5a6ae9
12. 0x452c806d12064308b4ebfccab1b646e19ca573918d5b585e504719cdb9979c1b
13. 0xcd9508730eccc12805d437e344327db8c6acaa3d9eaa561016f203991120b308
14. 0x8dce5117e7908d42b8abe04939e957eaffbae76d0f0a9d9ca7bb199e561aecf3
15. 0xd12637e9c035a4c3a66d0f0436dfc7bf3f13da4d17ea045b647d9e9beef1ef11
16. 0xa99a40fe210d675bb6ab72d4bb72ab40eb44ac345773c457fbe58e67a47b03df
17. 0x7a743a0a09057bae687051274e1d45bf973bd36a1a4ba16a191b5d29e3bdfa2a
18. 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae