Evidence row 443374

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://updown-io.usefulapi.io/mcp"
    ],
    [
      "web",
      "https://usefulapi.io/updown-io/"
    ]
  ],
  "name": "updown.io MCP by usefulapi",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-27T08:34:57.234517Z",
        "status": "active",
        "statusChangedAt": "2026-10-27T08:34:57.234517Z",
        "updatedAt": "2026-10-27T08:34:57.234517Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Check updown.io uptime checks, downtimes, response metrics and status pages, and create checks.",
      "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/updown-io",
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://updown-io.usefulapi.io/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "subfolder": "servers/updown-io",
        "url": "https://github.com/m190/usefulapi-mcp"
      },
      "title": "updown.io MCP by usefulapi",
      "version": "1.25.0",
      "websiteUrl": "https://usefulapi.io/updown-io/"
    }
  },
  "source": "mcp_registry",
  "summary": "Check updown.io uptime checks, downtimes, response metrics and status pages, and create checks."
}

What the leaf hashes

{"body":"8833a66739bd0283431a9c59d4a05e03f7f272503e1ce5898a668a0a13c1908e","id":443374,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793093259603885,"prev":56880,"subject":"mcp_registry:io.usefulapi/updown-io","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x39053882bf1e703b609836c7c66d44ec44b574b325512a6329415dfdad707be6
2. 0x29760bc545036e14426c81e354f8a2f1197a8e8d34f1facf9cd5ffde11ac714c
3. 0xc7ed972316b2b9625e83d96b109203405c4d713df07c8538fb219a93b30adf21
4. 0x185be5c065b40d08bcf649e599bf939931b8dc2a878746c454b87b9fd8f771da
5. 0xed792b1dceb0b6fb25ed4e8a5b036d2fc220e93ff681fc599582116ceb20c505
6. 0xd7d914cba422a4348af9666b2c25de24bf0433d9d6a0f0d54caa89460c4ab0b3
7. 0xcc57cbac8b6d8c76754da08be8e271c6e95b1f5f05ff6492264aa162f0d6d94b
8. 0x592df9acd848a166e7dea2b6ec78455a105576278495e456a87f5963045df00c
9. 0xa8a22f629b2045e0830e0c00d8271960c77ac7bf598fc8f2fb8f7c2ca1628b2a
10. 0x7caa46df4e3451a2de5503302692ea0475c7a29e499933d0b7ee3a1fa91bdcae
11. 0x7b8168d9a323983ca8a6e81296d112593f810321905f76034e59a057770de39f
12. 0x5ad46fa78d79ba6d76c322cad1bc48cbf0c26dc875ba94214d44c9d3c0b36673
13. 0x5a6a2d80130a2a2e783e8f8096057d594b53c7bc148344100f2c40afa809745f
14. 0x42784d9809d120654630ee1b254a1dd90a2bbd3024aa180f1a59bbf53e9316e4
15. 0x8360ee1105e4d9f9312067cbbfd47c69c5948665ae582b9684a580c8f4e199e1
16. 0x52efa60e0c3d8525486d2310eb3b6b566c9677c64fd1f819edb072cf101bcbdb
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4