Evidence row 525401

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.postcodecontext.uk/api/v1/batch"
    ],
    [
      "x402",
      "https://api.postcodecontext.uk/api/v1/compare"
    ],
    [
      "x402",
      "https://api.postcodecontext.uk/api/v1/outcode/:outcode"
    ],
    [
      "x402",
      "https://api.postcodecontext.uk/api/v1/postcode/:postcode"
    ]
  ],
  "name": "api.postcodecontext.uk",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "api.postcodecontext.uk",
    "endpoints": [
      {
        "description": "POST /api/v1/batch - Bulk UK Postcode Demographics & IMD Enrichment (1 to 50 postcodes with cohort aggregation and spatial summaries)",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "json",
            "group": "query",
            "name": "format",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "full",
            "group": "query",
            "name": "view",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "postcodes",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.05",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "7",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "Postcode Context UK",
        "tags": [
          "uk-postcode",
          "demographics",
          "property",
          "census",
          "geospatial"
        ],
        "url": "https://api.postcodecontext.uk/api/v1/batch"
      },
      {
        "description": "POST /api/v1/compare - Multi-Postcode Comparative Demographic Synthesis (2 to 5 postcodes side-by-side comparative analysis and affluence ranking)",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "postcodes",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.01",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "6",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "Postcode Context UK",
        "tags": [
          "uk-postcode",
          "demographics",
          "property",
          "census",
          "geospatial"
        ],
        "url": "https://api.postcodecontext.uk/api/v1/compare"
      },
      {
        "description": "GET /api/v1/outcode/:outcode - Outward Postal District Summary (district-wide median prices, transaction volume, and dominant affluence tiers)",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "BB7",
            "group": "path",
            "name": "outcode",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "6",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "Postcode Context UK",
        "tags": [
          "uk-postcode",
          "demographics",
          "property",
          "census",
          "geospatial"
        ],
        "url": "https://api.postcodecontext.uk/api/v1/outcode/:outcode"
      },
      {
        "description": "GET /api/v1/postcode/:postcode - Single UK Postcode Socio-Economic Profile (ONS Census 2021 demographics, IMD 2019 deciles, Land Registry prices, GBP/sqm, EPC ratings, broadband speeds)",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "json",
            "group": "query",
            "name": "format",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "full",
            "group": "query",
            "name": "view",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "M11AE",
            "group": "path",
            "name": "postcode",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "5",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "Postcode Context UK",
        "tags": [
          "uk-postcode",
          "demographics",
          "property",
          "census",
          "geospatial"
        ],
        "url": "https://api.postcodecontext.uk/api/v1/postcode/:postcode"
      }
    ],
    "enriched": false,
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792929344/bazaar-icons/9d2de4e5c0743e69.jpg",
    "id": "api-postcodecontext-uk",
    "integrationType": "",
    "isNew": false,
    "name": "api.postcodecontext.uk",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.0175",
      "currency": "USDC",
      "maxAmount": "0.05",
      "minAmount": "0.005"
    },
    "provider": "api.postcodecontext.uk",
    "providerUrl": "",
    "serviceName": "Postcode Context UK",
    "tags": [
      "uk-postcode",
      "demographics",
      "property",
      "census",
      "geospatial"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"a71d4d43b1ff2ad4e41345b041353caa0638f996ee9148a3c707765fc4d0e388","id":525401,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793124756798275,"prev":451712,"subject":"agentic_market:api-postcodecontext-uk","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xc8f6c892b7781c915badc589423ab55797564440a14ce72c97cf6cd174dd636e
2. 0x95b09efce4c0abcefecc6ddecc33ef63f214a07cc5ca1291c860d220a67e27ba
3. 0x17adbc62ec0f4b8ea449be12ef5957e429f9ffbf68c535b92c70123628cc044d
4. 0x15f84b5e4bba7722dcae8c442c88b734622dc34fa69486916bbdb0a8dba7db56
5. 0x8d05b403f422be14f212cfafb2e88f32d80a269805b0b436cf92d1a91e79d1ca
6. 0x6474c452a719767c255e9ba0946935ac54fe7953b68bd86cfa85845f4f0a16ad
7. 0x76f556f0497c1f86915f9eaeb66c7a057516feb8ae4c1ddd9e22d55bef08f967
8. 0x0f9a561f051496f2c88ea7e0ba1ec6d7b791c8586b05f599456e16059f429331
9. 0xf7e4abc3b39decb3b7b07e51f972237b0b96a73d0e8f279fdf47a1c0a839582f
10. 0x4277a4824a2d736f4a1c4b1cd631817841bf312f2a5427a5e9afa71523cd9ca8
11. 0x2cf261bd2238b74a95bc8d9823ad293037abc046c04aeff157cde0c97263ed73
12. 0xd16d7e5f125e1d777c4add2d34626605aa2a6b03288469395f9c1f401de8e9e1
13. 0x938752e9acd199cd15f468392bc2dd8eefc52293e7144e30b87b241ca6b2513b
14. 0xcc49fd573532e5a29f5be4033f62a2eff71456c020bd2258312b98e95cfe301e
15. 0x969cd44e5a4e8dc3110540398fbf689659eb51df735c1cda5d8f021ef9ff5683
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4