Evidence row 42773

What was observed

{
  "endpoints": [
    [
      "web",
      "https://base-gas-x402.vercel.app/"
    ]
  ],
  "name": "io.github.memosr/base-gas-mcp",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-18T19:55:25.95447Z",
        "status": "active",
        "statusChangedAt": "2026-10-18T19:55:25.95447Z",
        "updatedAt": "2026-10-18T19:55:25.95447Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Live Base gas, tx cost in USD, 4-chain comparison and gas history. Paid per call in USDC via x402.",
      "name": "io.github.memosr/base-gas-mcp",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "Private key of a Base mainnet wallet holding a little USDC. Pays $0.002 to $0.02 per call. Use a separate wallet with small funds.",
              "format": "string",
              "isRequired": true,
              "isSecret": true,
              "name": "BUYER_PRIVATE_KEY"
            },
            {
              "description": "Refuse any single payment above this many USD. Default 0.05.",
              "format": "string",
              "name": "MAX_USD_PER_CALL"
            }
          ],
          "identifier": "base-gas-mcp",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "0.3.2"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/memosr/base-gas-mcp"
      },
      "version": "0.3.2",
      "websiteUrl": "https://base-gas-x402.vercel.app"
    }
  },
  "source": "mcp_registry",
  "summary": "Live Base gas, tx cost in USD, 4-chain comparison and gas history. Paid per call in USDC via x402."
}

What the leaf hashes

{"body":"1cd1566228ab625d6cfca180aab29be8683a9fb59a5b0382f2ae5124cd27afb2","id":42773,"kind":"listing","method":"baseline/1","observed_us":1793025401547492,"prev":null,"subject":"mcp_registry:io.github.memosr/base-gas-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. 0xe514bdf2c44763568820ce78b393919953af155f04a15dea1a68b3b3df17e85a
2. 0xbc0d80e84625f8fa31705f828815a11cdd051da2780b4c67149a1689f1935d7d
3. 0x7c149de3f380be5eaee6278ab305a9534c298b08d721322115c8fc2b8d23ea3a
4. 0x1572c0ee1389eac4cc099634c24c6972d6481e368f4214ec12beffe42519f625
5. 0xd294c832c3f6ee968e314f078d1a56b6dfc141942bceed0131402a6c412993d2
6. 0xafc792133de07f8f781a35eb4ca51e64f77799e10e6a82a1a139acde10cde2d0
7. 0xd2b6561b31d7577c6bfc1e5e2f995ed47a7aabfb41388493d931b0681e497e73
8. 0x914992d51e49e367b6d002f589845f66102bee3f65039f23a2a97285a4babcb0
9. 0x8ada95f4a3619856b4c811eb375e4721b7e09d8e21d38c3ef2096e488010f37e
10. 0xae20f858f8c4842e59d76c7757bc2292fa50be5cf7697b284a497ee9ef7b2958
11. 0x29ce97b519f8e4dff85ae3006efb1220983d391295891bc9cbd27db51c46ec37
12. 0x2fc38b57208d692aab1ee89b6e26917df292126314027c27360c5644a63fd0bc
13. 0xc0924a0807e534382f518663123231c317124338831a2b310de2c17b09677086
14. 0x9bc5fc98278b9f6dc18c66c6e162aefd5244be03170d41bc5161f58ad11beed7
15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae