Evidence row 3723773

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": "2026-11-06T12:10:06.02573Z",
        "status": "active",
        "statusChangedAt": "2026-11-06T12:10:06.02573Z",
        "updatedAt": "2026-11-06T12:10:06.02573Z"
      }
    },
    "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": "1.1.4",
      "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":"fe67097d80a6b74fe86353e6ccc86344bb615558a2d70fb2737b9bc7a260003e","id":3723773,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793967741346710,"prev":3414490,"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. 0x094f76136073d218d7d3963d7159668d105b01cfac0dc8b954a7d3967b83031d
2. 0x129e46b593dc9b0ac6a01960192f23f465d8b40ff4a351cece25444c1a4d4b6e
3. 0x1eb318027b1a1069837da4fcad20bdb9f6859dbdeb77f5eb21a2208a6c869e23
4. 0xe5b9ec7281acfa0c78c63c4fee2ac470b37546398b97435b6eab37819a9fd9ab
5. 0xddf128b61c3565f9a175b3cf1f95c6821e6d1b557bb7a7d0bcd6c3ec552dd7f0
6. 0x9d61f27110c4780288d81580fad8e126abe8693ca371152d250444018b7d4c7c
7. 0x82e33ba136317a737639253a6af04c712237add42388d08aa65ab11ad229925d
8. 0x3da7741888cb7444329ec042a34bc22dbc2225ce720c0efb08d6adbeab19aae4
9. 0x309073efb61045cce7941e4c757d3cef647d0f0b637629478150fb68aa60d63f
10. 0x82633dbd4a78b9667539963223c7c642bf8859d746a885a04c1f498deceabdb9
11. 0x959ab296a3970341c0f71996fa3dcaba4d842caef642cda8eca40b269c8394cc
12. 0x2698876f54a758c12f2d8a55d1995e4ac647af40403c0573c159c54b5c89a5a6
13. 0x6b1059d214223ba232a27d5edff7b1ca30e5c5586268765def55110a4e62d106
14. 0xab5d80a23ca5a52b4c56f2bb72b2f4bbc10fbb76450f278d3e5eeb93a98596cb
15. 0xc1c168f06fcf5aacb7cf4877c193f1924402c94b5590a7647a022d30da984477
16. 0x63d3b15302a17641ec84d6d16c07594288ca45016a6cc12a65ca679e6cd95c97
17. 0xa448dc698494f795f2240c0e7070e8a93eb263baee21ca4185a7d03432a614d8
18. 0x119743aadcddb571b28b442b62196d4a0afc4e1c9979c2d477d34fcc9413deaf
19. 0xc0d08d48601d1be90bcfc025e66bcaa0030120d688dd9c919b36c2c4446f4948

Day root

0xb30ccefe7182c6f767e1fcbfb5f64ffd649da831f665f65c5ff39cd40512284f

Chained

0xc383f7ef68d2914082484765aa09e42c12c59a74a096ae64127c562618c506d3

Published

On Arc Testnet, block 71111178: 0xfba13cb7ee4ada7f2fee3702a786a2201596be2ffea37dfc281ab4c8e9942fe1