Evidence row 59741

What was observed

{
  "endpoints": [
    [
      "web",
      "https://postio.co.uk/integrations/mcp"
    ]
  ],
  "name": "Postio — UK Address, Postcode, Email & Phone Validation",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-23T10:09:00.302763Z",
        "status": "active",
        "statusChangedAt": "2026-10-23T10:09:00.302763Z",
        "updatedAt": "2026-10-23T10:09:00.302763Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR.",
      "icons": [
        {
          "mimeType": "image/png",
          "sizes": [
            "512x512"
          ],
          "src": "https://postio.co.uk/assets/logo-mark-512.png"
        }
      ],
      "name": "uk.co.postio/postcode-address-validation",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Postio API key (pk_…). Free key, first 100 lookups on us, no card: https://postio.co.uk/signup",
              "format": "string",
              "isRequired": true,
              "isSecret": true,
              "name": "POSTIO_API_KEY"
            },
            {
              "description": "Override the API base URL. Defaults to https://api.postio.co.uk/v1 (include /v1). Only needed for staging.",
              "format": "string",
              "name": "POSTIO_BASE_URL"
            }
          ],
          "identifier": "@postio/mcp",
          "registryBaseUrl": "https://registry.npmjs.org",
          "registryType": "npm",
          "runtimeHint": "npx",
          "transport": {
            "type": "stdio"
          },
          "version": "0.1.5"
        }
      ],
      "repository": {
        "id": "1226246873",
        "source": "github",
        "subfolder": "packages/mcp",
        "url": "https://github.com/postio-uk/postio-integrations"
      },
      "title": "Postio — UK Address, Postcode, Email & Phone Validation",
      "version": "0.1.5",
      "websiteUrl": "https://postio.co.uk/integrations/mcp"
    }
  },
  "source": "mcp_registry",
  "summary": "Validate UK addresses, postcodes, emails and phone numbers — Royal Mail PAF, live SMTP and HLR."
}

What the leaf hashes

{"body":"5213c63ea869ef18651d1b56029e7d345e34c38335aa4d0470014e092640696f","id":59741,"kind":"listing","method":"baseline/1","observed_us":1793025447249283,"prev":null,"subject":"mcp_registry:uk.co.postio/postcode-address-validation","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. 0x05653fdaa5c606a476f44bbbbd63fe5feef93617a4c20ee77f9534928cf3d86c
2. 0x27ff9a71ef4384cfdf66bd52346f116c6a9a9494d6e326ba3c16728030b4fb40
3. 0x042af5f73a1b373e2d8db3d3723a4ee1c1420ef5ee1fbd4f61f5cfc0d532b442
4. 0xcc4d523005a58c701c59ba8156e8eb76a95de28ad7e7597b538c39c850807599
5. 0xbb1f11fe812f5c352e5e8aa2959432f7663e95916748fdaeea9e9760fd935fee
6. 0xc162ac2cd5d53f09f1612728bbd6c67f27a1d5454b93b2d5eb209856f1992e04
7. 0x69162d81515717d16bdb280c5412bdfdbb6daa606da5d8d200aad01e7a9d35b2
8. 0x74297a4fe7704a69f7de6c40c0cbb09893271381fd0941f145dea62799825f8c
9. 0x722fbb07d5dbdec6b342192af17963d74b052eb7d6398822992a7843a87d580e
10. 0x29a79a1e444b726bf2db966f6ad9d0448d93ae7b7180fd783a410b336c52af9b
11. 0x88fb9d02ea6ed7254b70cfe02388b31c183a7a709aad6303948d66f85ad516b1
12. 0x7910a200eb458bec3c3badb3b2ead3e75cec5f3ba263800cea6b9f32efb53f25
13. 0x610fdf3e989af0a6b4a400a3a8aab9156d757f8c96efe4e9d0594dfd04de1cc0
14. 0xd1d3499072edb10edc68f84bcae2365d2ab534df689250cab18c751b6f13b6ff
15. 0x7ddc2fead128357f881b63e6c7c26d7fbbb84fca6c7c8e0bbfe386de86ca8d39
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae