Evidence row 39686

What was observed

{
  "endpoints": [
    [
      "web",
      "https://preflight402.com/"
    ]
  ],
  "name": "Preflight Checks (x402)",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-16T13:56:16.654164Z",
        "status": "active",
        "statusChangedAt": "2026-10-16T13:56:16.654164Z",
        "updatedAt": "2026-10-16T13:56:16.654164Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Deterministic pre-execution verification tools for AI agents with x402 USDC pay-per-call on Base",
      "name": "io.github.josediegorobles/preflight-checks",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Private key of a Base wallet holding USDC, used to pay each call via x402 (0.05 USDC per check).",
              "isRequired": true,
              "isSecret": true,
              "name": "PREFLIGHT_BUYER_PRIVATE_KEY"
            },
            {
              "description": "API base URL. Defaults to https://preflight402.com.",
              "name": "PREFLIGHT_BASE_URL"
            }
          ],
          "identifier": "@joserobles/preflight-mcp",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "0.4.0"
        }
      ],
      "repository": {
        "source": "github",
        "subfolder": "packages/mcp-server",
        "url": "https://github.com/josediegorobles/preflight-x402"
      },
      "title": "Preflight Checks (x402)",
      "version": "0.4.1",
      "websiteUrl": "https://preflight402.com"
    }
  },
  "source": "mcp_registry",
  "summary": "Deterministic pre-execution verification tools for AI agents with x402 USDC pay-per-call on Base"
}

What the leaf hashes

{"body":"35bf39e2cd9758235b79de7a46c6725288daae7a24e8715efa39f546b55ec46d","id":39686,"kind":"listing","method":"baseline/1","observed_us":1793025396059037,"prev":null,"subject":"mcp_registry:io.github.josediegorobles/preflight-checks","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. 0x6f1f9eb21a746a4ee76a090d28e76f3aafd29b845b1bc642b38691358ecaf371
2. 0x3dc743c3a12205b037587d18b461233cb7c920caaeb93d751cac3e7a395361dc
3. 0x6003e5600dd237e38c17e86dc320d035a580c9acf84957ff391cf7c23117bf26
4. 0x4ab55d784a7b86df2104069227e781a429a0b88283d18e42de2b6bea0e805ebe
5. 0xb2081fc8f454bc43ad472364044b386509699b17efc9c6488eb29787e30a8a80
6. 0xf56692a84cd34dc275163a371406892a16e3f4f8efd7762b0cbd3a3eb5123eb5
7. 0x479158b6463d586469c87553a87dc058d432a001a7fade17fa3e3428c4a53f8d
8. 0x901881c977e3004d4b527bfb7bb50d1a16c8808745523debcbe7dc71da837ce2
9. 0x3233ccff456551e58b13319f20aea0ad7617c984fa35496e2c86468f706b3400
10. 0x21697b5033eab051196ecfd0591995e96b02c13cc0342e056b639cda759e3630
11. 0xcea975b85294606fde77157e415805eb2b2339729d4782f73ff75ac4682fef10
12. 0x134f9b6d26973548d1c789e6b61a12b25e2a5a8fb632e692cd20a1b08d766a1b
13. 0x14b83e3bc6587240f31cd033d09d131e0775b7b00aada9042597008a70399013
14. 0xfc9b5a81a7a83a1c735a4fe64590beb9db14d2366f463161358af28c3ea9a81d
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae