Evidence row 3723624

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://lob.usefulapi.io/mcp"
    ],
    [
      "web",
      "https://usefulapi.io/lob/"
    ]
  ],
  "name": "Lob MCP by usefulapi",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-11-06T12:08:12.892421Z",
        "status": "active",
        "statusChangedAt": "2026-11-06T12:08:12.892421Z",
        "updatedAt": "2026-11-06T12:08:12.892421Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Verify US & international addresses and send physical mail (postcards, letters, checks) via Lob.",
      "icons": [
        {
          "mimeType": "image/svg+xml",
          "sizes": [
            "any"
          ],
          "src": "https://usefulapi.io/icon.svg"
        },
        {
          "mimeType": "image/png",
          "sizes": [
            "256x256"
          ],
          "src": "https://usefulapi.io/icon-256.png"
        },
        {
          "mimeType": "image/png",
          "sizes": [
            "512x512"
          ],
          "src": "https://usefulapi.io/icon-512.png"
        }
      ],
      "name": "io.usefulapi/lob",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://lob.usefulapi.io/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "subfolder": "servers/lob",
        "url": "https://github.com/m190/usefulapi-mcp"
      },
      "title": "Lob MCP by usefulapi",
      "version": "1.36.4",
      "websiteUrl": "https://usefulapi.io/lob/"
    }
  },
  "source": "mcp_registry",
  "summary": "Verify US & international addresses and send physical mail (postcards, letters, checks) via Lob."
}

What the leaf hashes

{"body":"3f3dcb8a4139a0568c8a70d5f66209c3a89affe8f374a7bdc8c662ec4e868173","id":3723624,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793967739973796,"prev":3414341,"subject":"mcp_registry:io.usefulapi/lob","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-06 (303443 rows).

1. 0xf319a08b9bae7584a56559ef8f215b207e9a300ee3d5da15850b8766f6497b78
2. 0xa0831c30d168c0088c831bab4bd10f8dfaa2cd7024dd07912aa19953bd3cd0de
3. 0xaeeb5c1a84c4ad916b1d4ef50267856002349ccb4568f115d75765934d4abe05
4. 0xbfa809fba71a3ebd353cbdedf602a77d34c0a65b7113c22759015314c42cafb2
5. 0x291b15952c3c2752ba5692a5c1014db3ef3dd76ea3eb4f17f0f381217cd28d81
6. 0xd84ae7545fe1f2e37c636bd863592c35f867881224f79225d54c1660ce035fc3
7. 0x1ece15f6c554ee8cf6e47297929f1845e5180f668bbfa14b1c08e5575a685bda
8. 0x4d2be8a8ce4536b4cc986a01fd23bf94a0d95433ba5e5c9b3329117185d0f93c
9. 0x6b05d0e204d7abab085c26ea11d971b0fd8fb2f4960e40e7d4537c71f2fc0389
10. 0xd725bf408f59ef63ae6bab3223c418f5301d8dc641bbb4f008ebe2c7c1b1acc4
11. 0x0f69f9dc906d9183284914665f87f53718fa39c4819dd4e1474323bbfe8a0103
12. 0xdc823d204c470b887be4426dead2781d9dbd279e667a368729444e6e7b789bb6
13. 0xa5dc4fb3a7ae09f3d06c57adbff25da103da7a1961739da10aa705af4b5cc1ed
14. 0xadb9e5d5e78a6ef642bc8b18b9f3dd14d6e5d20536651d3ce85fec62d35a6aba
15. 0x0bc8160b8c94aae791142fc9caa83c153cc73b339512089ee494d4e8e7094abe
16. 0x04c1c4929933bae20304ac32084d4b93dcac07567f68e828ac93bbc39eb4614c
17. 0x0ab273486ad4e41bf08c741b20b2ee12e0fc87eaa429a5467c58fd3be34409b9

Day root

0xb30ccefe7182c6f767e1fcbfb5f64ffd649da831f665f65c5ff39cd40512284f

Chained

0xc383f7ef68d2914082484765aa09e42c12c59a74a096ae64127c562618c506d3

Published

On Arc Testnet, block 71111178: 0xfba13cb7ee4ada7f2fee3702a786a2201596be2ffea37dfc281ab4c8e9942fe1