Evidence row 125796

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402.apidirect.io/v1/substack/category/publications"
    ]
  ],
  "name": "API Direct",
  "owner_address": "0x5d07cc2a0fb4eb123a525ca0b51cf6fb485014fc",
  "raw": {
    "accepts": [
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 900,
        "network": "eip155:8453",
        "payTo": "0x5d07Cc2a0FB4Eb123A525CA0b51cf6fB485014fc",
        "scheme": "exact"
      },
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "permit2",
          "facilitatorAddress": "0x8CDA367232d78c067116e3260da881d2da8ffa39",
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 900,
        "network": "eip155:8453",
        "payTo": "0x5d07Cc2a0FB4Eb123A525CA0b51cf6fB485014fc",
        "scheme": "upto"
      }
    ],
    "description": "Get a Substack category's leaderboard: the top publications ranked by Substack, each with its full details (subscriber badge, paid band, prices, author) and rank.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "category": "technology"
            },
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "category": {
                      "description": "Category ID or slug, e.g. 4 or technology (bestsellers and podcasts for the site-wide boards). See Category IDs (https://apidirect.io/docs/substack-category-ids)",
                      "type": "string"
                    },
                    "page": {
                      "default": 1,
                      "description": "Page number (default: 1), 25 publications per page. Up to 21 pages; rising 10; bestsellers and podcasts 4",
                      "maximum": 21,
                      "minimum": 1,
                      "type": "integer"
                    },
                    "tier": {
                      "description": "all, paid or rising (bestsellers: rising; podcasts: all or paid)",
                      "enum": [
                        "all",
                        "paid",
                        "rising"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "category"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "eip2612GasSponsoring": {
        "info": {
          "description": "The facilitator accepts EIP-2612 gasless Permit to Permit2 canonical contract.",
          "version": "1"
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "amount": {
              "description": "The amount to approve (uint256).",
              "pattern": "^[0-9]+$",
              "type": "string"
            },
            "asset": {
              "description": "The address of the ERC-20 token contract.",
              "pattern": "^0x[a-fA-F0-9]{40}$",
              "type": "string"
            },
            "deadline": {
              "description": "The timestamp at which the signature expires.",
              "pattern": "^[0-9]+$",
              "type": "string"
            },
            "from": {
              "description": "The address of the sender.",
              "pattern": "^0x[a-fA-F0-9]{40}$",
              "type": "string"
            },
            "nonce": {
              "description": "The current EIP-2612 nonce of the sender.",
              "pattern": "^[0-9]+$",
              "type": "string"
            },
            "signature": {
              "description": "The 65-byte concatenated signature (r, s, v) as a hex string.",
              "pattern": "^0x[a-fA-F0-9]+$",
              "type": "string"
            },
            "spender": {
              "description": "The address of the spender (Canonical Permit2).",
              "pattern": "^0x[a-fA-F0-9]{40}$",
              "type": "string"
            },
            "version": {
              "description": "Schema version identifier.",
              "pattern": "^[0-9]+(\\.[0-9]+)*$",
              "type": "string"
            }
          },
          "required": [
            "from",
            "asset",
            "spender",
            "amount",
            "nonce",
            "deadline",
            "signature",
            "version"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792917947/bazaar-icons/9c187cd7bdaa9439.png",
    "lastUpdated": "2026-10-25T12:22:48.643Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-25T12:22:48.534Z"
    },
    "resource": "https://x402.apidirect.io/v1/substack/category/publications",
    "serviceName": "API Direct",
    "tags": [
      "Substack"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Get a Substack category's leaderboard: the top publications ranked by Substack, each with its full details (subscriber badge, paid band, prices, author) and rank."
}

What the leaf hashes

{"body":"3c251466231c69fde8af0cb11b85375d2559f7f1867a156e9d528f622ee39b98","id":125796,"kind":"listing","method":"baseline/1","observed_us":1793025626721756,"prev":null,"subject":"x402_bazaar:https://x402.apidirect.io/v1/substack/category/publications","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. 0xaea01d48cc0b57991f109d254f4a4e536f55653427419dc6c72fbccbe4c9f4fe
2. 0xaabf5912fed3d8159320437b9fa77f17ae8d152e078176511d800412c98eb452
3. 0xdc42f1c86f336c1d4e9ee50f6552c9776af62527aecc8edaee5640d112aeac1e
4. 0x26d0f11158be2dd528c572f0cefe32cb3ed8d1de7c1345f50a6cee4fe0994a00
5. 0x6058422f3561555e0b1d43684c634bde11c27850f5ab955da6a3f9947a22e6b3
6. 0x2ddbe6476c5b0e1fafdd4a69b3bff209cb991a18f9b551ab655d77dac2cc6c69
7. 0x73e1fed4c30d0965f7560688fca95249e28b74af5d3231c1f32becd93eb3efdb
8. 0x92165b71797a2bff2e5630ac5e606dfa99f0700a09638abf6facbf677c5b94f2
9. 0x678b1c9db442ba319d1ce0624f056800a687e318e58a68153fd148b99c12a45b
10. 0xc5e28a96a833c7f6f25661bd128ed0a3708d099cd3594f653200c1fee17d99d4
11. 0x3ed84d9e7fe1a3a53a5614d97b48e393d726ca06109e83696375afe5ad01fd8f
12. 0x51f06c175a7c946ebe50ef243d6f9370a8fe85c996e53eff19ffcc4585ea8c18
13. 0xe292b5a99219f136bce6647ce74b21240a1c7331d2475b1839220fd363c94217
14. 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae