Evidence row 278885

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://health-api.tail11a58f.ts.net/ping"
    ]
  ],
  "name": "x402-testbed",
  "owner_address": "0xb92a731c08bf78f5ec87e8b48c74abf685e84029",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb92A731C08bF78f5EC87E8b48C74aBf685e84029",
        "scheme": "exact"
      }
    ],
    "description": "x402 Testbed: smallest possible paid round-trip. Use to verify your client can parse a 402 challenge, sign USDC, settle via facilitator and retry. Returns pong + network.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "network": "base-sepolia",
              "pong": true,
              "service": "x402-testbed",
              "time": "2026-10-20T15:24:20.636Z"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {},
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-26T12:53:57.028Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-26T12:53:56.007Z"
    },
    "resource": "https://health-api.tail11a58f.ts.net/ping",
    "serviceName": "x402-testbed",
    "tags": [
      "x402",
      "testbed",
      "ping",
      "developer-tools"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "x402 Testbed: smallest possible paid round-trip. Use to verify your client can parse a 402 challenge, sign USDC, settle via facilitator and retry. Returns pong + network."
}

What the leaf hashes

{"body":"a812ed1cfdf985ea008faf206be03f78525e8001a494463073ea9d56dbf6d7ae","id":278885,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793042080119789,"prev":16535,"subject":"x402_bazaar:https://health-api.tail11a58f.ts.net/ping","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. 0x342ed7f637772b7cf400bc9ae009647b764b2b83d23b58570841a45fd78b4978
2. 0x5a773e7724ccf672dffa6bed5d8ba79c7553fa2e5a6aab016021abd8ed5afc55
3. 0x2f729470595b8150a07079c11aefe002f01999a0685f0b7fb375071d105a8baf
4. 0xffc4b6d3fcdec84fafb50a1aeda37151f416332ec0bd6de246685d6aef8cff97
5. 0xdea3926a0e4be61977912a46707760e4d7b000c300d4d0d4559917b3ded8df74
6. 0x5fba0244d77883237cedb0907f8be411fa2301ed1bb299d173145c9a00e314df
7. 0xcd61b577101aba335a5d4324315cb5aec52050c6482b95afd3c710f61dd00748
8. 0x27fe9d06ba15e7c5fca43a1408f138640b9409c6fd4f6c12f9d9ef3d986b1005
9. 0x82cf6b3d1aae668d4027a29813a07304e6d8998e5336cc71e349905c8a69da93
10. 0x177012e4764007ed1fc9fe062981493cb1e87dce78b4d705154fc6b59f179dc8
11. 0x25f1494b636c5e3c47bd014c16b8f4b5df5a8fb62efdc32979420416a8736679
12. 0xe57be1a98d96d75db9e9d2122794eabebfd735dea66e9d16ca63347243b3d483
13. 0x08de74b7fb265ddb83e4c673da8a94e5f71829b2e6e7464c71c5138e450f2217
14. 0x4338355a835617a26aa0bfcc971e84eb030d84e2aa840e3c8af958921dd080c7
15. 0x610738e0c43687aded83c613c73de8b5226c73c375858a167436461c522ea213
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae