Evidence row 3414490

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": "2026-11-05T13:39:17.294945Z",
        "status": "active",
        "statusChangedAt": "2026-11-05T13:39:17.294945Z",
        "updatedAt": "2026-11-05T13:39:17.294945Z"
      }
    },
    "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": "1.1.3",
      "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":"e00710e561d8eb42cd22692f8baadb838853ef7c4a65da84b53f4f262b37cd69","id":3414490,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793888498838200,"prev":3396238,"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 2026-11-05 (322504 rows).

1. 0x935fab1f71e0ff179f4a059c2f20ddff5b84a75896bc6e0e7f254bf78d2ffb34
2. 0x6aff6f3c9fc8339a9ad026ad8579ee4496e50cd35055da28861cae99cd8c6bd4
3. 0x953414bcb6591560890c9cee6602c84838eee3f47e820622f41a5ac9a6a64e4c
4. 0x0ee78deb4e1b6f362992b10654a3d0a26a12e37c3497f5d62f7009deba254adc
5. 0xdc192090d0c62b947c6136922a0c4519f13dbcac7adccf395ad7ebfda78146a0
6. 0x99f87a30f9becfad6f912c74314f37cedfdad7a751a8a3e8dbe3db68e3ae10e9
7. 0xf298b4da8f411fac8b4a5fda7fc7c8cc9d36952a8e07cfdcb7fd50c5e5a0809b
8. 0x31b748d07bae053ddb52afbc308e682d9e4770744aa8b4afcf4fbfccc70ebda0
9. 0x6d8debbcbb8167416d7702d69ab7ed6ae5b4b08db9214f814bd9207d5fc304db
10. 0xc3ed094b338485ce4725e6471076946027cec7f60237c681f975951a727a0c0b
11. 0x3ce860b6d74cf1610f7b081f22f3d3c562907a50c5c9dbd0ffa2183e8944e19e
12. 0xc4a7556bf6939b6474df02304ebf0b2e1ddb9fcd470754cf2e608b88c6177c2e
13. 0xa3664085bcc71207d81f3865ecbfbe8edaf5dd0f35cf6509def349bf1e19db53
14. 0xcd7dd4b73475d9daf8066f64735db723e9ca6d35bbe9f3158528fa2e4ee200de
15. 0x8d4c57bbc31050ce925844401ecdf17b888da2f6d1ae583a863bdf84d2854302
16. 0x5c64b7138585466e7e8be72af6f3dc72c511db2c0c1dc5b6e34ad4e9456c2308
17. 0x7e5b4628b4269525ce0744fb873651b9d7be5748de44b7e6b858af09c7e30bd8
18. 0xfb4e1f4d701ae273fb0cd57757f659e327608e5561a752b2099b436618493c84
19. 0xf72fe7c4860b9addb17aac4a00b8afc2f8085836173f10f31697c3d192df119b

Day root

0x9f0215efb0252701dc86d5600ce95f276cccc716759bf112525ae863f698d128

Chained

0xc54ddff800630c6cd9656f99e7d6a61adce99bf1cea37121600598b0a9a720d2

Published

On Arc Testnet, block 70942081: 0x88f612ad94ca63af4e4e9faab9f34b665b41f03828afac1571ad013cc62bba94