Evidence row 3765149

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": "2026-11-06T19:36:50.343556Z",
        "status": "active",
        "statusChangedAt": "2026-11-06T19:36:50.343556Z",
        "updatedAt": "2026-11-06T19:36:50.343556Z"
      }
    },
    "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": "1.2.1",
      "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":"2c229fd2a4ba08e31163db03e5f140f0398b3082778b00b57c03da083ecaf3a4","id":3765149,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793996596759711,"prev":3723773,"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 2026-11-06 (303443 rows).

1. 0xfcfbf76cb4f256b6d46351a75334c51ce41ea36e2c1307391f7a9812a4c1bc97
2. 0xb5d2230146884519c9466a7d34bdda61e2408ae402925ec15ba1958fcc76b7a8
3. 0xd99d1a64167b6b71b50f36cc1c87b1c753665c14eddc9df60651edc151937bd5
4. 0xfe40094515afbc99ca9ebe8767104da81a7a384bdbbc0e623e3c8768c5c8c676
5. 0x662bc44c1c0c6c6bb19859a163f9b20edeaf4211fb226a809f37ad13781b3185
6. 0x89732d6a1c0aa61390e3dbc6393832a6be09e47e74cad76728be48dd64550690
7. 0xd136eb8de2f64b706965674147e30279c61dab877305e42652871bcc0c6c81c0
8. 0xc47e7c6ba2ec2a7baa6b29530a2efe57245856c2b49d3cd9aeb833a3f04c0ffa
9. 0x9d1a6d044eda046fc029f0f9b1ce783b3476c1456414abcca56a5afd04e37e1d
10. 0xd7e3cf2dddbf87ddb6f541d9cf359844c311709622672cc836f59294adf6115b
11. 0xf825caed5cc8478e9bf887906a23981e87da41eb6cc589191567adc09bada670
12. 0x30b7d730b69442ac5eccee8a54739a363dab815ab1fb8f5adbdff20dd8730eeb
13. 0xa53611af41fac56adf4e62af88a228aaa11b318341a167e3543a17186090472b
14. 0x86593ac15f658012908c6be3447438c3409f4e6b92fd02ad8b0b2a8f74233080
15. 0x4d1da9738e22475b7194f6dd7a6c3348b6abb938507afdcb6452d859f52556b2
16. 0x0ab273486ad4e41bf08c741b20b2ee12e0fc87eaa429a5467c58fd3be34409b9

Day root

0xb30ccefe7182c6f767e1fcbfb5f64ffd649da831f665f65c5ff39cd40512284f

Chained

0xc383f7ef68d2914082484765aa09e42c12c59a74a096ae64127c562618c506d3

Published

On Arc Testnet, block 71111178: 0xfba13cb7ee4ada7f2fee3702a786a2201596be2ffea37dfc281ab4c8e9942fe1