Evidence row 517778

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Start a BuyerAware pre-purchase verdict on ONE used vehicle. Runs a mechanic-grade read: ranked failure points with $ exposure, recalls, seller-claim fact-check, fair price range, adjusted true cost, risk score 1-10, BUY / BUY_WITH_CONDITIONS / WALK_AWAY, a word-for-word negotiation script, and lower-risk 'Tank' alternatives. Supply whichever of listing_url, listing_text or vin you have — at least one is required, and more context sharpens the verdict. Takes ~1-2 minutes: returns a job_id, then poll get_verdict. Costs 1 credit. For 'what should I buy instead' use tank_alternatives, which is free.",
      "inputSchema": {
        "properties": {
          "buyer_context": {
            "description": "what the buyer needs it for, budget, and any specific concerns",
            "type": "string"
          },
          "listing_text": {
            "description": "the listing copy pasted as-is, when there is no shareable URL",
            "type": "string"
          },
          "listing_url": {
            "description": "link to the listing — Marketplace, Craigslist, AutoTrader, a dealer page",
            "type": "string"
          },
          "location": {
            "description": "buyer city/state, for pricing and inspection context",
            "type": "string"
          },
          "vin": {
            "description": "17-character VIN, if the listing shows one",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "analyze_listing"
    },
    {
      "description": "Create a BuyerAware API key so this user can run verdicts (3 free). Call this once when no key is configured, then show the user the key and tell them to save it. Do not call it again for someone who already has a key — one trial per email address.",
      "inputSchema": {
        "properties": {
          "email": {
            "description": "the user's email address; the key is issued against it, one trial key per address",
            "type": "string"
          },
          "name": {
            "description": "optional display name for the key record",
            "type": "string"
          }
        },
        "required": [
          "email"
        ],
        "type": "object"
      },
      "name": "create_trial_key"
    },
    {
      "description": "Fetch the result of an analyze_listing job. If status is 'queued' or 'running', wait ~15 seconds and call again. Free — polling never costs a credit.",
      "inputSchema": {
        "properties": {
          "job_id": {
            "description": "the job_id returned by analyze_listing",
            "type": "string"
          }
        },
        "required": [
          "job_id"
        ],
        "type": "object"
      },
      "name": "get_verdict"
    },
    {
      "description": "FREE, no API key needed, answers instantly. Recommend 2-3 lower-risk used vehicles ('Tanks') from BuyerAware's curated 47-platform database that land near a budget. Use when a buyer asks what to buy instead, or what is reliable for $X. Use analyze_listing instead when they have a specific car in mind.",
      "inputSchema": {
        "properties": {
          "budget": {
            "description": "target purchase price in USD",
            "type": "number"
          },
          "category": {
            "description": "sedan, hatchback, small suv, medium suv, large suv, midsize truck, full-size truck, diesel truck, minivan, wagon, hybrid, phev, ev, luxury",
            "type": "string"
          },
          "limit": {
            "description": "how many to return; default 3",
            "type": "number"
          },
          "max_risk": {
            "description": "risk ceiling 1-10; default 5",
            "type": "number"
          },
          "mileage": {
            "description": "mileage to price at; default 100000",
            "type": "number"
          }
        },
        "required": [
          "budget"
        ],
        "type": "object"
      },
      "name": "tank_alternatives"
    },
    {
      "description": "FREE, no API key needed, answers instantly. Look up one platform in BuyerAware's curated database: risk score, verdict, the one known trap, private-party value at a mileage, 5-year operating cost. Covers 47 US-market platforms; anything outside it returns no match, which is itself a signal — follow up with analyze_listing.",
      "inputSchema": {
        "properties": {
          "mileage": {
            "description": "mileage to value at; default 100000",
            "type": "number"
          },
          "query": {
            "description": "platform name, e.g. '4Runner', 'Camry V6', 'CR-V', 'Tundra 5.7'",
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "tank_lookup"
    }
  ]
}

What the leaf hashes

{"body":"285092b648b243723c217310c243ecab816d1936173c8c99d4fd7b07809b784a","id":517778,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793121285946288,"prev":null,"subject":"8ca6dbaa-3981-422e-b18c-9aebbc71afad","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. 0xebca7e9cbacfb6fc3b39a5ad9ee7ae806a347ae0a579ebc328a506ca0d92c583
2. 0x7bf96d600a7db0df149700164b511ccd84a41f3312de78741d0eb85c1f50c1d1
3. 0x655a26331df03ae07ebf38aaedec902355a96c58e20ca58f208a313863187fc7
4. 0x9253c2af65e0ead0bd3c3e26ebe5d3e3c17ff366b69e06780baba2eeec8baac4
5. 0x4effecc40014e5e9d0a4e70df8b67b118b4b7f3e1f4f84b5e965fbc0f3b3b3f0
6. 0xf03b21a25bdc1e6faeecf6c4d1b13488a961dbcc200f792995853e9eb2a3cdad
7. 0xb9983d412e8c799cfffb7957ac43df08094ff5080d38eda76458a2b73c464c1f
8. 0x4aeac326d81b9bdf298f6e69ca75a0952c2d2b5b61a895119d767a9bcf4e8680
9. 0x45e8689a64228e5a0ea7f04a80dae2f11cc628a3d7aedc6d0744cd500c6d6021
10. 0xdaf848f74770c7306d5ce0afa39fe9e157a88d16c1379890545e1752b9240a2a
11. 0x8d7aa81f73a59db43b926bc8fc89ae1cba0632ecf1e5b94b087e267f66888fba
12. 0x71d164c799d87b4dc25af672a70aaf73791d8dbb1786a5d4eb3ead269cb7c28a
13. 0x89602081fbcc80aef8908f5df765767a1a41cc8b089111259ea78e6583a8bc4b
14. 0x41f9f462759cb539183e979fb3eb967d94755cf039c44a64a9a3c4ad97523cfd
15. 0x56f7109d4cde42492651beb1237c13cdcbf95e6fee2b2482391a2388e04c4629
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4