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Evidence row 75822

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://getamber.dev/api/v1/contracts
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
1427996f3979ccf37f35a60abaafec23aca7bc2ba1f79ce05d774a9067e52c5d
Leaf
0x7cc7f87d85b2c98feb0d01b36c048c0b1cde8f284de72d4c1f18fe2b83e5b533

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://getamber.dev/api/v1/contracts"
    ]
  ],
  "name": "getamber.dev/api/v1/contracts",
  "owner_address": "0x963d26feead94424a14394ce56da62ea88f12b7b",
  "raw": {
    "accepts": [
      {
        "amount": "200000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0x963D26FEead94424A14394Ce56da62ea88F12B7B",
        "scheme": "exact"
      }
    ],
    "description": "Create Ricardian Contract (a1-service-purchase)",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "parameters": {
                "consumer_email": "consumer@example.com",
                "consumer_name": "Example Consumer",
                "currency": "USDC",
                "delivery_timeline": "Within 24 hours of payment",
                "fee": 20,
                "governing_law": "Singapore",
                "provider_agent_id": "0x0000000000000000000000000000000000000002",
                "provider_name": "Example Provider Ltd",
                "refund_policy": "Full refund within 14 days if not delivered",
                "service_description": "One month of market data via API"
              },
              "principal_declaration": {
                "agent_id": "0x0000000000000000000000000000000000000001",
                "principal_name": "Example Principal",
                "principal_type": "company"
              },
              "template": "a1-service-purchase"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "contract_id": "AMB-2026-0001",
              "sha256_hash": "0x..."
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "parameters": {
                      "description": "Template parameters",
                      "type": "object"
                    },
                    "parent_contract_hash": {
                      "description": "SHA-256 of a parent contract (amendments)",
                      "type": "string"
                    },
                    "principal_declaration": {
                      "description": "Who the agent acts for",
                      "type": "object"
                    },
                    "template": {
                      "description": "Template slug, see GET /api/v1/templates",
                      "type": "string"
                    },
                    "visibility": {
                      "enum": [
                        "private",
                        "metadata_only",
                        "public",
                        "encrypted"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "template",
                    "parameters",
                    "principal_declaration"
                  ]
                },
                "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": {
                  "properties": {
                    "contract_id": {
                      "type": "string"
                    },
                    "sha256_hash": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "contract_id",
                    "sha256_hash"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-25T08:23:45.54Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-25T08:23:45.305Z"
    },
    "resource": "https://getamber.dev/api/v1/contracts",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Create Ricardian Contract (a1-service-purchase)"
}

What the leaf hashes

{"body":"1427996f3979ccf37f35a60abaafec23aca7bc2ba1f79ce05d774a9067e52c5d","id":75822,"kind":"listing","method":"baseline/1","observed_us":1793025491135363,"prev":null,"subject":"x402_bazaar:https://getamber.dev/api/v1/contracts","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. 0x7cc81997513e316f0e089e1efd6fe0b24a30f5313cbf884caf03979b826d412e
  2. 0xbc5be31b88380eac35c57473fa8b76a8ef4e71c31f57f2964918043469225a07
  3. 0xc32cdefd80ec01e9750d22724247c5dd7c344ab2d9ed69d1c86459ba1ca17669
  4. 0xdf65f017392582ae42714803028fbfd26d4ee8f4ccf9158c4aa5255849bd00e2
  5. 0x243785b6c375c516065e64a1c9fbd458bb18e348b5ff0e7471279fea2ffe2ef5
  6. 0x4a7b2f18f6a2ee0b230b9bb5b0c0aa41f8b70ab1a6ed913f59c031e0f69c6be9
  7. 0x2cd7371eb98c82aa918b66178ff1654eb67b3f1dad3e8ece7f4a8b0884c14b45
  8. 0xbc95e5969ad85e8a0b03139c83f007745cecb6b43af6c7f4e04bd358d4205bdc
  9. 0x4a59d37e87bfd6c1a73e2e46dcb996811787999807c2354410bd4889fc4c24ba
  10. 0xf0ed0e925a8a7da0329fe426ca59f504fc92f30b2f6f61a5828a859ff9cdb816
  11. 0x05b818019343d04f2973b36329a447f88301721891653961b94822610edda553
  12. 0x779c77295186b32da6387dfb36d3a76522e7d713472a7cebed7c93529ccc4be6
  13. 0x0bffb634300aa5609bddaa79e8d31d7cde36c0a5a4465472f809b9f5287e40d2
  14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
  15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
  16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
  17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
  18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON