Evidence row 3958279

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://retainful.usefulapi.io/mcp"
    ],
    [
      "web",
      "https://usefulapi.io/retainful/"
    ]
  ],
  "name": "Retainful MCP by usefulapi",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-11-07T18:05:36.521191Z",
        "status": "active",
        "statusChangedAt": "2026-11-07T18:05:36.521191Z",
        "updatedAt": "2026-11-07T18:05:36.521191Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "List contacts and lists; create contacts, add them to lists and record events in Retainful.",
      "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/retainful",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://retainful.usefulapi.io/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "subfolder": "servers/retainful",
        "url": "https://github.com/m190/usefulapi-mcp"
      },
      "title": "Retainful MCP by usefulapi",
      "version": "1.2.4",
      "websiteUrl": "https://usefulapi.io/retainful/"
    }
  },
  "source": "mcp_registry",
  "summary": "List contacts and lists; create contacts, add them to lists and record events in Retainful."
}

What the leaf hashes

{"body":"b076f57613999aa02fd86a351b3c08a5d6ddd1b32c1fba427688907a90766ff5","id":3958279,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1794075904265819,"prev":3945433,"subject":"mcp_registry:io.usefulapi/retainful","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-07 (195826 rows).

1. 0xed50f28b0c503dafadc77590ed0dff4388f33232ec6977d7826a1f903540dedf
2. 0x68a1c467c97d81c2194f43d3d66893c2bd22f1c9226d0b788ceb976a7b4dae2d
3. 0xfdad3a5827da661113be43ed0b82778274731796c720add93fa69d941c033b4e
4. 0x06b26ad18f089b24a1a0d7edc69c9326e28963f2ed2c995e4e2378b6d2fddd8a
5. 0xded852ca5941d05e782e7cfa0846b8a6f131e088f7645eb276a4d372d87b708f
6. 0xce662b95b0e86dda5fb5585d4438c8240e1bc3bef8b979affa883b3e2dcd3adf
7. 0xb6bfbb9a55c42da7906d69ae3a47ff5674a811208a214fb443165473a4b9598a
8. 0xd881525ef3ccf2adc7326b1958e805f4d914e65f4d821e1452407b8fb2042a25
9. 0xc992919f19e55008bc3d3ffd38268ed23c7cb0f4cdba6dd84d9f081bd62739f8
10. 0x7296d1b00f408f6b57eca597df98112b6369151c669fedd9ff8780ccca69565e
11. 0x9f3b856e9a6846a75c13cfd17b703da7545065eb1189bfef36f8b76545150b44
12. 0x87acce77df29e8c81b4d7f9fdadb9b4738a681812af886fe197d489ce8b4d569
13. 0xa246de0ecf2c7ea6bb3364bd51f238e41f260c2a06f814448edd91148e5d0d71
14. 0xf43413f83ed03b7c7cf9da72bbeca9e32610d671fd1e4e2b0c0cf6b3d8b94516
15. 0xb6dc07358d0932b83c713d4c82df6764849db6e58ee1c7cbc06d03f381a6b36b
16. 0xbb3be27e5da5ccad91ce4674c6eac53275c0832f3885b89533d2be65d38f2fc6
17. 0x9ea7c2ecc6985da4b761b0f9096b7858b3ac8e3e47717c3840537fb2ff31c6df

Day root

0x17da9e85e1b138541355d33543ff34e3503cd3a49d37728fb53643e2a0416a2d

Chained

0xed34bd4af17282643de8cb9591c84d0aa1b39e1e9ae9864941e543f5a15718cb

Published

On Arc Testnet, block 71280839: 0xc3f6784179e0ca32236ba89472473e882a81d03fcc5ce27ca58ded2e01e112aa