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Evidence row 63926

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://agentshelf.syntexa.ch/v1/base-nft-owner
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
6fcfeaa020d1126d6c30decd56c48e704a582a39e1206098a3fc03592790da90
Leaf
0xefc4529e81d533e9916559c29362fed7b8f8a4ce0829b409bdc54738ec4b5def

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://agentshelf.syntexa.ch/v1/base-nft-owner"
    ]
  ],
  "name": "agentshelf.syntexa.ch/v1/base-nft-owner",
  "owner_address": "0x1d61faa032d3f40d9c470d2bf3a3f53de0e55a38",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0x1D61FAA032d3f40D9C470D2bf3A3f53De0E55a38",
        "scheme": "exact"
      }
    ],
    "description": "Call when an agent needs the ERC-721 owner of token_id on a Base contract, plus whether ERC-165 reports ERC-721. A missing token errors. Read-only. No spend. Send JSON {\"contract\":\"0x1111111111111111111111111111111111111111\",\"token_id\":\"1\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/base-nft-owner first.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "contract": "0x1111111111111111111111111111111111111111",
              "token_id": "1"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "billed": true,
              "contract": "0x1111111111111111111111111111111111111111",
              "network": "eip155:8453",
              "ok": true,
              "owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
              "receipt_id": "rcpt_01EXAMPLE000000000000000",
              "supports_erc721": true,
              "token_id": "1",
              "warnings": []
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "examples": [
                    {
                      "contract": "0x1111111111111111111111111111111111111111",
                      "token_id": "1"
                    }
                  ],
                  "properties": {
                    "contract": {
                      "description": "ERC-721 contract on Base. Example: 0x1111111111111111111111111111111111111111. ownerOf(token_id) is read-only.",
                      "examples": [
                        "0x1111111111111111111111111111111111111111"
                      ],
                      "type": "string"
                    },
                    "token_id": {
                      "description": "ERC-721 token id as a decimal integer. Example: 1. A JSON number is accepted when it is a safe integer. A missing token errors.",
                      "examples": [
                        "1"
                      ],
                      "pattern": "^(0|[1-9]\\d*)$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "contract",
                    "token_id"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "additionalProperties": false,
                  "examples": [
                    {
                      "billed": true,
                      "contract": "0x1111111111111111111111111111111111111111",
                      "network": "eip155:8453",
                      "ok": true,
                      "owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
                      "receipt_id": "rcpt_01EXAMPLE000000000000000",
                      "supports_erc721": true,
                      "token_id": "1",
                      "warnings": []
                    }
                  ],
                  "properties": {
                    "billed": {
                      "examples": [
                        true
                      ],
                      "type": "boolean"
                    },
                    "contract": {
                      "examples": [
                        "0x1111111111111111111111111111111111111111"
                      ],
                      "type": "string"
                    },
                    "network": {
                      "const": "eip155:8453",
                      "examples": [
                        "eip155:8453"
                      ],
                      "type": "string"
                    },
                    "ok": {
                      "const": true,
                      "examples": [
                        true
                      ],
                      "type": "boolean"
                    },
                    "owner": {
                      "examples": [
                        "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
                      ],
                      "type": "string"
                    },
                    "receipt_id": {
                      "examples": [
                        "rcpt_01EXAMPLE000000000000000"
                      ],
                      "type": "string"
                    },
                    "supports_erc721": {
                      "examples": [
                        true
                      ],
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "token_id": {
                      "examples": [
                        "1"
                      ],
                      "type": "string"
                    },
                    "warnings": {
                      "default": [],
                      "examples": [
                        []
                      ],
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    }
                  },
                  "required": [
                    "ok",
                    "receipt_id",
                    "billed",
                    "network",
                    "contract",
                    "token_id",
                    "owner",
                    "supports_erc721"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-17T08:29:11.983Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-17T08:29:11.783Z"
    },
    "resource": "https://agentshelf.syntexa.ch/v1/base-nft-owner",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Call when an agent needs the ERC-721 owner of token_id on a Base contract, plus whether ERC-165 reports ERC-721. A missing token errors. Read-only. No spend. Send JSON {\"contract\":\"0x1111111111111111111111111111111111111111\",\"token_id\":\"1\"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/base-nft-owner first."
}

What the leaf hashes

{"body":"6fcfeaa020d1126d6c30decd56c48e704a582a39e1206098a3fc03592790da90","id":63926,"kind":"listing","method":"baseline/1","observed_us":1793025455813685,"prev":null,"subject":"x402_bazaar:https://agentshelf.syntexa.ch/v1/base-nft-owner","subject_kind":"source_record"}

Proof

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

  1. 0xefc4531f1ad93cd9971cf4d925b4486c167d752f767649343e495d03ee616b51
  2. 0xf171266fb20a8a5e80947e03ecd75c56d730f133b7b7ed8eb8db8d01a9106687
  3. 0xc5887a61d60b88808c2ad55e0bd85787f74d6f0d7bde92abb8833f15a08c7cde
  4. 0xf527ee6c05576d176db4106525e556edc05d8ee2570786f6de5d76a3893d1a1e
  5. 0x65b314670107e2daaa0431c281ac035d81b52c58fe274b3776620272fd1aac78
  6. 0xaeaee1e946b56ce799a9955cdc7180f2120d327e440993429e2a0b3bf3a31128
  7. 0x657d93775491df8d3f6d48275afd15e7510452b20721d659075754ca13d48d51
  8. 0x2d89b83f787a6af072cce65b4ff8b7bf28991e54bdc260650b726280fa4dd6f7
  9. 0xca9452281dd709133dcf94a94732c68bfa017fef5a05af7b259a2c7a598b66fa
  10. 0xe8ce6526203eeff278621cde08607876fd3c33b3d5f8f0c68cd3d71fb0fdc142
  11. 0xe34b4862878cc4926f0e4b84b3f031ef1f0cf0de9bf8fb3c13adbc6abc010ee1
  12. 0xb0cc0b4ce5a68e83d3e3e55b0387f828adf6f5eb6cfa666d75f6e16ed9d89c1f
  13. 0x746e9e5b6765727b6b96f41204cc115b0302259f6c67be0cf0efbf245601d500
  14. 0x614d844c9e0509d9f9e63697aa2935555bce5f13695a8dc0047aa9e9898d70b3
  15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
  16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
  17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON