Evidence row 23944

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://mcp.lettio.eu/mcp"
    ]
  ],
  "name": "Lettio MCP",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-09-15T20:42:59.856348Z",
        "status": "active",
        "statusChangedAt": "2026-09-15T20:42:59.856348Z",
        "updatedAt": "2026-09-15T20:42:59.856348Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Private, EU-hosted email for AI agents over JMAP: read, search, reply, organize, send.",
      "name": "eu.lettio/mcp",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Full email address of the Lettio mailbox, e.g. you@yourcompany.eu.",
              "isRequired": true,
              "name": "LETTIO_USERNAME"
            },
            {
              "description": "App password for the mailbox.",
              "isRequired": true,
              "isSecret": true,
              "name": "LETTIO_PASSWORD"
            },
            {
              "description": "Mail host. Defaults to https://mail.lettio.eu.",
              "name": "LETTIO_HOST"
            }
          ],
          "identifier": "@lettio/mcp",
          "registryBaseUrl": "https://registry.npmjs.org",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "0.1.2"
        }
      ],
      "remotes": [
        {
          "type": "streamable-http",
          "url": "https://mcp.lettio.eu/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/lettio-eu/mcp"
      },
      "title": "Lettio MCP",
      "version": "0.1.2"
    }
  },
  "source": "mcp_registry",
  "summary": "Private, EU-hosted email for AI agents over JMAP: read, search, reply, organize, send."
}

What the leaf hashes

{"body":"98c3c90501090d4f3b4a9ed2f6a0f12f64eb7c23703f478eae1d1d6d48e41bd6","id":23944,"kind":"listing","method":"baseline/1","observed_us":1793025351672881,"prev":null,"subject":"mcp_registry:eu.lettio/mcp","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xaba012695fa2512812fb6d94caee8f75555c227c00df471058625d450f0acab0
2. 0x4d95adc583bad95ddcea42ffab88e5341d13aa3458fd119633149d64aa7ae7d3
3. 0xb52a5e45b38a945a0e441184b644655b129434885b6c04a6119c072c798120c9
4. 0x41caf8bce6759bd86d363a538a53c3c4bcd97fd523e46c3f2dac3da43f01f779
5. 0xcc98efba3cb0ca214f65ac81be8eb04915783280c35dc14d799d26452292cff2
6. 0x02ef573ef4191b54e82f4e2c6f1a996966a8862f94253ad5dad892ebdc311a76
7. 0x167481b1f87143530ccc779d1d91cf9bd1d0b4f706e77ff8eb0f9a5bc5dcea0e
8. 0x2d0a56c2f14c1d80dfef5e2451fba8b2cfc3d97e9233ddd2ad43132999e31da9
9. 0x1fa965679b8136f79cc3e927c5953dcbef05a2d5bab815cdd3bbcff445fc8076
10. 0x3fa5eaa6d08becab2832207a749500470aa2568b12840b9e743f3ba19967d00b
11. 0xe285855b14529e4bf6d93d3ce05a3365dcfc651d48b9dfeb5c229a51822613eb
12. 0xb7fae69bb7bd717d54a83df961404a3e4de2a5cfbcfa013fd83a38627fe13f7e
13. 0x4700d6dfdb40e52e2ceb8ffe62c75f3f708d23452f828255fd003d795f5d9d66
14. 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae