Evidence row 3945433

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": "2026-11-07T09:18:35.410552Z",
        "status": "active",
        "statusChangedAt": "2026-11-07T09:18:35.410552Z",
        "updatedAt": "2026-11-07T09:18:35.410552Z"
      }
    },
    "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": "1.2.3",
      "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":"b8c8b269f231dcc2d0307ce65f35df25954357e9a9163cf7e703b56ef8fa1d60","id":3945433,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1794043458138172,"prev":3775453,"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. 0xb460f22332e0f36574044f0cc1ca28cdcf023fa2940356d90a6e5c90b3264cdf
2. 0xa01b8f2045647b5a6f45f286732440e1b045e9ae8a47689e8d85511ee33a13db
3. 0x32458b00c6e22ce2904fc8064fd9e2ebda3b45b8bc94ef3b755a948068283eda
4. 0xf71c17f43a6d0bcc6de578b27a1032636400edcab95612febe554afba3e3dd6f
5. 0xdf669ed2233b8ec760b4027e23890b2fdbab3bf923b417eaf597274392f8fd3a
6. 0x41563fa43001b76982b3a23d95bba0d603a3522759db36e26f4defddd6b1501a
7. 0x93003ea0808a9237fdaa39092e6415cd95bcbef9e830380ed1a3bf9066f0f036
8. 0xc5fa898aaf3a824caa9da91b3a9151ad5955575ac5617f4145814538007d8f6e
9. 0x67a91543aab3ca4c912b6e1a254647391829ec15ab8459f5a0f882132dd22975
10. 0x37a15b532621ce1db3828358adea7797d10f87c1e6e5059498643db9a379ad86
11. 0x31eec7eb3e6c0d3dd2d7475befaba3079c249013ada9c99778be9cf7ed338305
12. 0x3b4d392860baaff3af817458687511193d5ea96765008276c14d01f08d0eecf0
13. 0xf4ed46d8eff25af1a9e80eed6f55719653e8cb1d0b480eb2d9009abe9c0a5315
14. 0x6065413194326b10c0e957a6ed77fad045c76a708d9f5e291ca690223cf2d7ba
15. 0x2afbeaef1e4de4b2a6d70326e3dc41f9f1c65d4fc46630d217fc932790b0680c
16. 0x3235c8a33ac14441f1a12a6515f670286d48b48fa98eb1dce45d902e053abe01
17. 0x9ea7c2ecc6985da4b761b0f9096b7858b3ac8e3e47717c3840537fb2ff31c6df

Day root

0x17da9e85e1b138541355d33543ff34e3503cd3a49d37728fb53643e2a0416a2d

Chained

0xed34bd4af17282643de8cb9591c84d0aa1b39e1e9ae9864941e543f5a15718cb

Published

On Arc Testnet, block 71280839: 0xc3f6784179e0ca32236ba89472473e882a81d03fcc5ce27ca58ded2e01e112aa