Evidence row 3396238

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": "2026-11-05T11:43:08.288709Z",
        "status": "active",
        "statusChangedAt": "2026-11-05T11:43:08.288709Z",
        "updatedAt": "2026-11-05T11:43:08.288709Z"
      }
    },
    "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": "1.1.2",
      "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":"217add960570845a5e2b5ea4a891bfd86da76fa6ee771090fe6ac6968281a8f5","id":3396238,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793881290321305,"prev":2726672,"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. 0xb2830a444ec826cf204f3a3fc1734275616916894f3980336df6d8c5909c675a
2. 0x261db7b7d0a768bfb773a39e909e626aa544c5df4a6d0ce25bcc8f295c87c6de
3. 0x8d6fd2356b1162a824d0ab0969735fb279da381488bb01836a47dc682cf072a7
4. 0x3bf362f6721b775a5e478e718faf784c26887110425dd498544c086a6f0cc9ee
5. 0xb30b5f94b31d79b864c7fb0061abea146539594bac34a58bdc4ccd928b47ae4b
6. 0x05f4935fe0d6f225b55c660c03f26122d9963d934c337c1ebf1a4e4cdd580215
7. 0x46845ca67afa6dcdbbd90e5d144882de7f90d6d7c3b7faf304a3936dd4f760fd
8. 0xef8e328497149223975e505a812e6d5d2c36f0986f36a785d311f47a45b50233
9. 0x23c60794b0b42af66372c7c595cae332af3b3eb83388766f08613f9d2f8f858f
10. 0x29d47522e009bffad2020bc2d0ea7170bbfd7e949659795dba3f7bfe67d75748
11. 0x56263e4423fb6c7d0351aa40a8c26549e959c8292c5b7684fa13ef522e0a1d47
12. 0x7894cfe4ae76627d023cdbd24de2bd9bfe3d08ed77ffdb4d08f21a7bd5022cd8
13. 0x4297ded3b7ae7a5e7c6aaf868e1595cb5dfd5bc570ca8e58312e1c93b27e2840
14. 0xe9b3feeda7ba0471328dce63fe578d2b6d168331915c3460a3110e4549c6245c
15. 0xfb7fd5d9f2dad2a875d0018c34534e495fa88fbef40533c4ec84080e09b402b0
16. 0x94ca8b6a95491be1f3ac6de55d756552e3d7dcdd3a530f60ac239342f2227667
17. 0x25f3843b1f8d3ded906cf440101c0137d8f897b0b72f946f0d5bc12c3da6b136
18. 0xfb4e1f4d701ae273fb0cd57757f659e327608e5561a752b2099b436618493c84
19. 0xf72fe7c4860b9addb17aac4a00b8afc2f8085836173f10f31697c3d192df119b

Day root

0x9f0215efb0252701dc86d5600ce95f276cccc716759bf112525ae863f698d128

Chained

0xc54ddff800630c6cd9656f99e7d6a61adce99bf1cea37121600598b0a9a720d2

Published

On Arc Testnet, block 70942081: 0x88f612ad94ca63af4e4e9faab9f34b665b41f03828afac1571ad013cc62bba94