Evidence row 51856

What was observed

{
  "endpoints": [
    [
      "mcp",
      "https://api.send0.dev/mcp"
    ],
    [
      "web",
      "https://send0.dev/docs/quickstart/mcp"
    ]
  ],
  "name": "send0",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-13T03:58:54.088101Z",
        "status": "active",
        "statusChangedAt": "2026-10-13T03:58:54.088101Z",
        "updatedAt": "2026-10-13T03:58:54.088101Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Email inboxes for AI agents: create an address, wait for codes and links, send and reply in threads.",
      "name": "io.github.send0-dev/send0",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "send0 API key (s0_live_…), from https://app.send0.dev",
              "isRequired": true,
              "isSecret": true,
              "name": "SEND0_API_KEY"
            },
            {
              "description": "Default inbox (ibx_…) for tools that take an inbox_id",
              "name": "SEND0_INBOX_ID"
            },
            {
              "default": "https://api.send0.dev",
              "description": "API base URL, for a self-hosted send0",
              "name": "SEND0_BASE_URL"
            }
          ],
          "identifier": "@send0/mcp",
          "registryBaseUrl": "https://registry.npmjs.org",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "0.2.1"
        }
      ],
      "remotes": [
        {
          "headers": [
            {
              "description": "Your send0 API key as a Bearer token",
              "isRequired": true,
              "isSecret": true,
              "name": "Authorization",
              "value": "Bearer {api_key}",
              "variables": {
                "api_key": {
                  "description": "send0 API key (s0_live_…), from https://app.send0.dev",
                  "isRequired": true,
                  "isSecret": true
                }
              }
            },
            {
              "description": "Default inbox (ibx_…) for tools that take an inbox_id",
              "name": "x-send0-inbox"
            }
          ],
          "type": "streamable-http",
          "url": "https://api.send0.dev/mcp"
        }
      ],
      "repository": {
        "source": "github",
        "subfolder": "packages/mcp",
        "url": "https://github.com/send0-dev/send0-v2"
      },
      "title": "send0",
      "version": "0.2.1",
      "websiteUrl": "https://send0.dev/docs/quickstart/mcp"
    }
  },
  "source": "mcp_registry",
  "summary": "Email inboxes for AI agents: create an address, wait for codes and links, send and reply in threads."
}

What the leaf hashes

{"body":"e24c9976fa5f761ae584d01963b0e221590db905e87adbe07a64b98eb7eee5c3","id":51856,"kind":"listing","method":"baseline/1","observed_us":1793025418396797,"prev":null,"subject":"mcp_registry:io.github.send0-dev/send0","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. 0x6281ad07087977b969c433990f4fde48bef2ddc07138015e5f241ecf8f88c601
2. 0x93765f247303727de9ec2f0a492d8baff0593d389400d72a9a1cbc4e2ca718d0
3. 0xc1ab062d882a71c134973e0e53935c2e888bacf1db2ab9e77913371c689acd0f
4. 0xe6f85e6b2012dd64d11ee395162c81b8dde21661a8302b88c68628aea8adf544
5. 0x3e6918b727d185ad3e178cd3388671568786308e8b5fe76fcf0f1aa99409a8d6
6. 0x1acbefd238e8f3d8e192debdddc56cbcdd3fafae737bc00e803947a68a10e322
7. 0x81ef22834f00569aed273a29c8b89c21204523f09d58acb008370b49db867f02
8. 0x8f20f89a3fecc0b58e2b92b6df40361e1697df541b3a2436890c53cf32ef582c
9. 0x19d8f25097cc526849a9f96a43bac5867c7364680c1ce654e33c2238d194f256
10. 0xbc3c355b950c7c23082f84a109d9c2ea6ccfd6ca5cc47b5103a3180b43e85bfd
11. 0x131755a2ea202f5e6a5e7b2b4223cbbcd0bee9398f637648162d1129112491ce
12. 0x7285c0b02d1aedd949b8ba0c7b2499f7121588ebdd4c96ef8725919bb84dd534
13. 0x89fcaf55e37dd777228f271b79ea895534a66ec0d184363c2a6eb1b4d23c9ef1
14. 0x216cebb9ae5414599109a02297c4817d7d1c6b1394afeb97efe38e32f0053974
15. 0x7726154b91b2ad65b13849ef6cb6443b1f0ff113a3089c9bd5f2bcfc16be099d
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae