Evidence row 2564818

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": "2026-11-03T09:55:33.557877Z",
        "status": "active",
        "statusChangedAt": "2026-11-03T09:55:33.557877Z",
        "updatedAt": "2026-11-03T09:55:33.557877Z"
      }
    },
    "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": "1.1.0",
      "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":"4ce28f23c5e0e1aef3246c713e9d44871f0fc2d75131448f383d84fd100ece4f","id":2564818,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793701163113053,"prev":2546713,"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 2026-11-03 (425475 rows).

1. 0xaf63137427f69a93b7730350aafa73fb22dedc7ce5f047eb9f39881e036463a7
2. 0x32071472f5407413ab280132f6d05a216b8dee2998a962dcc016e8a8161deea5
3. 0x7ec9389c1ef79a4c12124f4d05f9b3fa000102bbe13e787dd3b96f1db339dc29
4. 0xe1da662a32137a04eb922fae2a0fc41e5482ef4f5207a77095afc2fda39e8b06
5. 0x91b38ea5914789d2ec62309ace3905a7abf36c48a03d1db9a6d8558c8875b029
6. 0xb18ba27aca37a14a940bb3ce4135c0b886412c8d8d75b53bf50a0d400bc199b3
7. 0xbc9877f1830f82179ba8295ed8185f1c8e6a02f0bfb7b63c697e7d123472bacb
8. 0xba241de2b0cb066b08c6378275ec4558df85f38ed785935d7b63ffb2ffc43a17
9. 0x83fbe52e30a91015c02f80d4c76df85cb47d7adef1731c22cb98c068c12aa439
10. 0x671e3dc593c6385cc8956d46d30a2c0794667bbfda05f186d816b2d3bbf8577d
11. 0x144347167b2284f85e885743d9d6e9b760b5dba5d7646ac6b040a37d32a0e9b9
12. 0xe76f791089ba448cf5c37346afb8fe5ee2f3f91391fde676597825bbe36679a0
13. 0xe77cb660ad4fc9cdf06388820598606d0cfed52a41772cd9d2f56246f2635e96
14. 0x11934b37b54663f98169a4c48cc2b0a60fa4a3c4018d1ce3e508ac01ae614249
15. 0xa538822e863ef8366c4eb66bf75faf8a639aa1f066f65f7444fa54d54d48ec53
16. 0xdbc1c0882584cff2eba84dcd18af41b5fd070127c962a21b00db1ec3e352cc94
17. 0x39dab39081985bbfffe23b080399a9d1a9cb9c2c8960102350c4212113cb2cba
18. 0xac5402954216dc6c7020a6405675c8fc3b0828c2ab02943d80de52677a2f1fc3
19. 0x85f3a27c16056a361d9ba33355a575ca7123f86de901b204c88953c4b8ea441a

Day root

0xb646ffa569e24bf8336b0a15a9d98d0a2f1239f58e10c2b18a9d22e43343566a

Chained

0x35e926359fd19031c6b5e08fb3b44f2524386a57c8fdd353336c185603f53d43

Published

On Arc Testnet, block 70601990: 0xa5f9dadba13cde129126b950e64b815e6833cb8ff53b75026c9dbe769c3768c7