Evidence row 17029

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://preflight.kagurazaka.dev/v1/preflight"
    ]
  ],
  "name": "x402 Preflight",
  "owner_address": "0xe6f7508ab572a4dc9c7486ea017b100d83f3c3f8",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xe6f7508ab572a4dc9c7486ea017b100d83f3c3f8",
        "scheme": "exact"
      }
    ],
    "description": "Check an x402 seller before you pay it. Probes the endpoint now, checks that its payment can actually succeed (token EIP-712 domain, payTo), and adds its 30-day uptime from our monitor of paid Bazaar listings, how many distinct buyers paid it, and how its price compares with similar listings, with cheaper well-used alternatives. Returns a verdict (ok, caution, avoid) with the reasons.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "max_price_usd": 0.05,
              "method": "GET",
              "url": "https://api.example/v1/search"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "bazaar": {
                "calls_30d": 3,
                "last_called_at": "2026-10-20T08:00:00Z",
                "listed": true,
                "payers_30d": 1
              },
              "history": {
                "last_failure": null,
                "last_ok_at": "2026-10-25T00:00:00Z",
                "median_ms": 210,
                "monitored_since": "2026-10-01T00:00:00Z",
                "price_changes": [],
                "probes": 120,
                "uptime": 0.99
              },
              "market": {
                "alternatives": [
                  {
                    "payers_30d": 40,
                    "price_usd": 0.002,
                    "resource": "https://other.example/search",
                    "uptime_30d": 1
                  }
                ],
                "median_price_usd": 0.005,
                "query": "Web search for agents",
                "similar_listings": 20
              },
              "now": {
                "method": "GET",
                "ms": 180,
                "networks": [
                  "eip155:8453"
                ],
                "pay_to": "0x...",
                "price_usd": 0.01,
                "status": 402,
                "x402_version": 2
              },
              "reasons": [
                "Only 1 distinct buyer paid it in the last 30 days."
              ],
              "url": "https://api.example/v1/search",
              "verdict": "caution"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "max_price_usd": {
                      "description": "the most you are willing to pay per call; a higher price gives the verdict avoid",
                      "type": "number"
                    },
                    "method": {
                      "description": "method you will call it with (default GET)",
                      "enum": [
                        "GET",
                        "POST"
                      ],
                      "type": "string"
                    },
                    "url": {
                      "description": "https URL of the x402 endpoint you are about to pay",
                      "maxLength": 2048,
                      "type": "string"
                    }
                  },
                  "required": [
                    "url"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "bazaar": {
                      "description": "the CDP Bazaar listing: distinct payers and calls in 30 days",
                      "type": "object"
                    },
                    "history": {
                      "description": "our monitor's 30-day record: probes, uptime (0-1), median latency, last failure, price changes; null when not monitored",
                      "type": "object"
                    },
                    "market": {
                      "description": "median price of similar listings and cheaper alternatives with payers and uptime",
                      "type": "object"
                    },
                    "now": {
                      "description": "the live probe: method, status, latency, protocol version, price, networks, payTo",
                      "type": "object"
                    },
                    "reasons": {
                      "description": "why the verdict is not ok; empty when it is",
                      "type": "array"
                    },
                    "url": {
                      "type": "string"
                    },
                    "verdict": {
                      "enum": [
                        "ok",
                        "caution",
                        "avoid"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "url",
                    "verdict",
                    "reasons"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-26T12:00:52.726Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-26T12:00:52.348Z"
    },
    "resource": "https://preflight.kagurazaka.dev/v1/preflight",
    "serviceName": "x402 Preflight",
    "tags": [
      "x402",
      "trust",
      "due-diligence",
      "buyer-tools",
      "uptime"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Check an x402 seller before you pay it. Probes the endpoint now, checks that its payment can actually succeed (token EIP-712 domain, payTo), and adds its 30-day uptime from our monitor of paid Bazaar listings, how many distinct buyers paid it, and how its price compares with similar listings, with cheaper well-used alternatives. Returns a verdict (ok, caution, avoid) with the reasons."
}

What the leaf hashes

{"body":"17b5f0d56b0bb74e2d244c39fe285263ea8348e4070eb87cef1ea6758a989b92","id":17029,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025325448028,"prev":null,"subject":"x402_bazaar:https://preflight.kagurazaka.dev/v1/preflight","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xf1657b376e2ffb3c5ea631eeb804849c25b331d5195facda8e86013629278e2c
2. 0xe7ae803a5062ebbee5b0f218322fd9cdb8d06e85aedf536944bf7699ad53ff99
3. 0xe6e1468a2b1d6a0b8f5e444ccb4bf04c3ae35c605ce346e6862c59f88741cb6c
4. 0x05ffe1343f1eac19de252690c894d8f50ca550f818bb6721bacf80b3cf749451
5. 0xdb6e84272a9a6086317f1c9fda4a7748405beeb13cd72da61a021c690168e477
6. 0x4863c7362cbc427d0b7b436a19ed4e1ba4d8282821eb7e264e5f63abf58cd8f1
7. 0x02b3eca943cbd600a10a1f0442313c1304ea5d75aa6cc280c6405d058558c522
8. 0x6eb82cd8774fa76b4f14a3cb225ddf4caf045dc5e7abd1fd27b44c21342fe82d
9. 0x46613c0a42d561a7a07ec88601367eb9190899add6946bf0d246502a841548b6
10. 0x1374d43b83adaf6956b75a4ffa6be9b5d88f279b0e1f9aa9cb997253f28541e1
11. 0x3fbb508bb3373d829808c4b964e49bf52f1a8877acba747d2b92b5eac81e6259
12. 0x4d2e94451b5ffc570a23dee9d1525bc305f1009994ffe23d8e2e7d45c60f6209
13. 0xa26f0437cba4d7d64f1cf98bf4f490e1ebb6f66a5e2331537b7ba8b3061084e0
14. 0xd769d41500075835c3b2f9184d223699fb983fd05c29fbcb44d964abc7ee380d
15. 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae