Evidence row 3396090

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": "2026-11-05T11:40:56.041321Z",
        "status": "active",
        "statusChangedAt": "2026-11-05T11:40:56.041321Z",
        "updatedAt": "2026-11-05T11:40:56.041321Z"
      }
    },
    "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": "1.36.2",
      "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":"fa3cf072b84d728394007837daf9d3ed134654aaed9a74d4a440ee0c73332244","id":3396090,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793881289312689,"prev":2726525,"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 2026-11-05 (322504 rows).

1. 0x5381f17514c0000af9a03deee15c248d24c1d347492f16a88d5c0d9975efc92a
2. 0x9ade432dbb0568b747c3ec9096371ee638aeca6b8fd18352fab3dcd56b11f774
3. 0x63c8767004e0d2e07e5260dd56c19050007d6aff8f29e592ed6ed5ff901cd775
4. 0x6c03c39fc4a991f3a3f57a206c6c789a400b7f7896c12a7afcaf9256905f8524
5. 0x5a37969a4a5ad303cdc4be3884499c05b6c2ce6a1c12daeeef2bd271e8cf26ce
6. 0x64ee615e68178ae97339e144aa216639e5c78c8686481a05ce26e5d63416e1bd
7. 0xd0d52fd71faea5f66d2b8f4fbffed9c753781b98ff8b43bbbf6315df64569280
8. 0x5755503d07cde99eb40d9623731561eb6a0b32c911deb34277d667c0e13d9fd1
9. 0xd3852c5a61c7fe3d1b4585a05fb9adf270b8f0e6e9bc6db983f2a827f1c93692
10. 0x59f341706932ca2c030ac954a27ae23a5ecd6161ddc55b8f43d8335cb9a8d539
11. 0xb076d9c271611c2b2a18f8deec901bbcd5ac529866d89ec7e04b4f2f8dd217be
12. 0x94855cbf315fc660355225f867ad0fcd54561ea27f2a6ca9376d874585b50275
13. 0xff04f88f01db14dd3ab75ae4ad845f5913e27709edbc0eb6237c5c128a69b491
14. 0xc7c9a02b10652443317f29964cb3f80c8edb43f84b67644463046121ae250d1c
15. 0x20ca3add72ff47f6497449b7ee3adf1c6f2cdbedf8b5a49a56da543bf096a5fe
16. 0x01716548fb56e8e74ac29a1a638626afc662ed7e187bafcf089344de82365b83
17. 0xddde0b0de5219c91c717b03cab5216193dc0f26fb006aa8ba17020a71dbd997a
18. 0xa9caf228b42660818160afb416ff04cb014f57c4d8ee75ea3452fb76c3d8c645
19. 0xf72fe7c4860b9addb17aac4a00b8afc2f8085836173f10f31697c3d192df119b

Day root

0x9f0215efb0252701dc86d5600ce95f276cccc716759bf112525ae863f698d128

Chained

0xc54ddff800630c6cd9656f99e7d6a61adce99bf1cea37121600598b0a9a720d2

Published

On Arc Testnet, block 70942081: 0x88f612ad94ca63af4e4e9faab9f34b665b41f03828afac1571ad013cc62bba94