Evidence row 1537946

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": "2026-10-31T20:56:27.778892Z",
        "status": "active",
        "statusChangedAt": "2026-10-31T20:56:27.778892Z",
        "updatedAt": "2026-10-31T20:56:27.778892Z"
      }
    },
    "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": "1.33.0",
      "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":"8269aa0dac511976f2e6f100e7d3b16271c123344ee1673d8f06b0f4f1c2e53f","id":1537946,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793481418067439,"prev":1500244,"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 2026-10-31 (246033 rows).

1. 0x5f1fb0b94ac4a0251ffdf84bf3a7a3c4b0812da16e93e60ad770516f12bf8440
2. 0x3ec7fb3c794f6d8fc3b88b5555041b4c6bbf18a2845b0fdf7478909fcba6ea45
3. 0xf933d5c0a9fdc60f36c0a6ffa428dad463a41fcc14e58ae0af3f4266899ebf0a
4. 0x5c24425aaf159a09c554a112b06d1c14f5fc5fd5b0b8600369645f6ea710fc0a
5. 0xd4c3f3cc0e6f45e47b4c4d05d54e5282e79e70e438e337a41cef6cd434771bd9
6. 0x69c6c4743b8c59a6cad552580f59f0322c2a9b1737fda61a1ff0be4a6573c514
7. 0xa470fecbeb428b396c14864e8671d2160392b2601b1b8b85ce698fbfd5eca647
8. 0x05151fe37cb3ce16840dd55aa7b3e2b89489133ed966f42eba04b3365054d78b
9. 0x688b47c4f2ec80570a9890d36918d5ba4ef682b5fb5326bb4851dab118f664a9
10. 0x6a65c9dc13a2d7bf90660469aecb0f5664353f74d6351e5a7e421d58cdb8dd51
11. 0x31758b1d5c2e22c0591cf6e28c149e3889cc65603068333ed4ddf76d6a0ad4fb
12. 0xa5db48a4304108f3eabc27a9ef089ec07fdd3f0f898dea7f7a40c247710dd72d
13. 0x238075122bf391de34d3a894036bb855e1137942648f00143f9a686a726fcddd
14. 0xe765fc7bdfb534be348bf6984775b8261507431e58900f7a1ab269c53c5b1e8b
15. 0xb9a00c724331b305deaa876d5d2baf53b847ff3c7ce37abb0ae1653b2534aad5
16. 0xad4540f06e3fdfe46524d8592f8d854d4849e16217bc047eaf024f0abebe34b0
17. 0xa00a931d72706fa2402bfc9b441a12eb7c6a61ff42a542916106e3637177f101
18. 0x59f83f7228f07febe2780660e422e171b0359b8aa031ee3be07e991118130c15

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0