Evidence row 4537

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402-paid-mcp.vercel.app/api/v1/sha256"
    ]
  ],
  "name": "x402-paid-mcp.vercel.app",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453",
      "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
    ],
    "category": "",
    "description": "",
    "domain": "x402-paid-mcp.vercel.app",
    "endpoints": [
      {
        "description": "Compute a SHA-256 hex digest of a text payload. Cryptographic hash / checksum helper. Not an attestation.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "hello",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.001",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "36",
          "l30DaysUniquePayers": "5"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://x402-paid-mcp.vercel.app/api/v1/sha256"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "x402-paid-mcp-vercel-app",
    "integrationType": "",
    "isNew": false,
    "name": "x402-paid-mcp.vercel.app",
    "networks": [
      "Base",
      "solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.001",
      "currency": "USDC",
      "maxAmount": "0.001",
      "minAmount": "0.001"
    },
    "provider": "x402-paid-mcp.vercel.app",
    "providerUrl": "",
    "serviceName": "",
    "tags": []
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"1b4b6093890cfbdb0df67cde10d34ea0255703bc7fa8858644c03b4a412577d5","id":4537,"kind":"listing","method":"baseline/1","observed_us":1793025278059976,"prev":null,"subject":"agentic_market:x402-paid-mcp-vercel-app","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. 0xaa7b1a7586e032260b0f741979bf164bf5fda950c2c7b70e84705baba8632aaa
2. 0x989b4c551fdedf6f549bc307d22e198dd6dc7eea9abea6d984d48ec58a1c2276
3. 0xde09d074a97375e6a294c4aa1ebd190687b0771945768dd157b45f186f2ad009
4. 0x9efc2d0af13887a18d9ef6d76de807d9aaf658dd3174742ec9012fbd13478c8a
5. 0x11070de77ab0bc6a689dba4e33dc1141893d495dc692a3d22f141f473dbeab0a
6. 0x1fa6f4d992526d202aed026886d1f7c26f6c609eade6cfa426138e468c85216a
7. 0x1f070b4b82cdbe7d97c4e411860147f04754c72e2e0c84bdf5700727d301544c
8. 0xd4ac9d034d2770d107f30723c20e6abea7eacffcfd882acd53594318c4b4ebe1
9. 0x67a13a7b274532e8a2df569986a43149c15dd30a3921882e484880330685bbf0
10. 0x2b0e99631562bdd3560762c8951137943186bf9575ee3728c8efc429f26f9563
11. 0x34f0b80539e95d0ba892dff063414c35c62850f82e1414765524114c8dbacb57
12. 0x09a19b8d31a6e948e5051cb72b98b1d2b2bfe053f62d6d24d61c22b3ed1c3f24
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