Evidence row 1257659

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": "2026-10-30T15:15:51.001604Z",
        "status": "active",
        "statusChangedAt": "2026-10-30T15:15:51.001604Z",
        "updatedAt": "2026-10-30T15:15:51.001604Z"
      }
    },
    "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": "1.30.2",
      "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":"c3c5813c676d6b0c8d21c7242f8485f0f5a996130f83a2a308d1bffd7707dc31","id":1257659,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793376929954634,"prev":1249672,"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 2026-10-30 (243099 rows).

1. 0xd44f797c2aedd079e99b31180ec8ad132a06912c07c9a39a0556a63396e59bc7
2. 0xcf4caa627530ec7b5ad08f78df276503c2a33f73f79fb46bacc5290e985f0804
3. 0x86b1eb2f2788145b92e4a9665fc49f90c310866f10ec0e5d205a16ade28f4f34
4. 0x7db2d7599efcca2fd223f70eb929412a262a3627a797f034c36257c3075467b3
5. 0xfa10b059554d2a087168c4a7c6372286a4079aad9f3fad68715564d910acc728
6. 0x526ada4bee8a0cfff1cbbdb85f9c3291d42ac4cb787507ba359373ec14e989f7
7. 0xce462e0124094959ea3accf8cb357384d326fb7e67f8adc27b8d6b9af1a3fb86
8. 0x9e0ca2681cfdbce577a2dbfa2c1a970d7fe005642139089e12cb33857289d9f7
9. 0xde12bd9ab69ee0efe7b324cab0a82c5f023d72d75a2d24d318e4ca7859faf524
10. 0x21643918acc84866a4bd731e73b3ae1b07a887d5fed367519f55ca501ed95b8c
11. 0xfd626689d436765d3e90831a891606bee5c67bf319c29fe75d7e1310b6f1ca3a
12. 0x41785913cf8a748ad4b7f6562cd47054490c6e6361d26689f4b8aeba4a1d3afe
13. 0xc6d56e36bc916fc7c1441d5c6959a1f0ff7bc0a11547893598fdff5ead2b0cb1
14. 0xeba66653f0c009452ec9977578ba573460df3f672595eaa16c1030e3b20ce767
15. 0xf007cd9640267a58ddffce96e27f5682cf5c47530f53dc15dc53e4ccd405c6c9
16. 0xfbe61dc2d59668ac573e5eab865747e21d38bf2fe4c64762beef01f1018a4dea
17. 0x71e74c274b23c9047354edb6dcd2c654415e3986b8bd875dae992996ea12e22b
18. 0x0c43c73b62a5d49ee1444b5dc4195fc5b16b141d3f4458e2e9fbd5fd6ecb367d

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861