addrbookFor publishers
← The evidence ledger

Evidence row 120105

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/kb/dns-records-lookup-dnspython-a-mx-txt-ns-ttl-nxdomain-noanswer
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
0014b9a5c72ec76f0e23a95672159692c79080ba656cde9ae41567bd1534fefe
Leaf
0x1dc45fdce54461a0a48d7bd4e50cd80483c68b51875d6a6d19749a2e53ff747a

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/kb/dns-records-lookup-dnspython-a-mx-txt-ns-ttl-nxdomain-noanswer"
    ]
  ],
  "name": "Saylor Innovations Guide Library",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:dns-records-lookup-dnspyt",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:dns-records-lookup-dnspyt",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:dns-records-lookup-dnspyt",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "memo": "saylor:dns-records-lookup-dnspyt",
          "reference": "FzTAX4k92CFm47MDbBUBwz2uxgSdq1U5zhQeotSwgCw2",
          "session": "eyJhcnRpY2xlSWQiOiJkbnMtcmVjb3Jkcy1sb29rdXAtZG5zcHl0aG9uLWEtbXgtdHh0LW5zLXR0bC1ueGRvbWFpbi1ub2Fuc3dlciIsInJlZmVyZW5jZSI6IkZ6VEFYNGs5MkNGbTQ3TURiQlVCd3oydXhnU2RxMVU1emhRZW90U3dnQ3cyIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRVBqRldkZDVBdWZxU1NxZU0ycU4xeHp5YmFwQzhHNHdFR0drWnd5VER0MXYiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3ODE4NzI5OTJ9.lrwUg3QniSQngcbCdIucva5sZbOZMa8H0wjHm2cl07Y"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "memo": "saylor:dns-records-lookup-dnspyt",
          "reference": "4V8aGYTWDHQnzeTQNwWpf9pZuxw9xKcD6JYcxxPmAbV8",
          "session": "eyJhcnRpY2xlSWQiOiJkbnMtcmVjb3Jkcy1sb29rdXAtZG5zcHl0aG9uLWEtbXgtdHh0LW5zLXR0bC1ueGRvbWFpbi1ub2Fuc3dlciIsInJlZmVyZW5jZSI6IjRWOGFHWVRXREhRbnplVFFOd1dwZjlwWnV4dzl4S2NENkpZY3h4UG1BYlY4IiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjoiRXM5dk1GcnphQ0VSbUpmckY0SDJGWUQ0S0NvTmtZMTFNY0NlOEJlbndOWUIiLCJtaW5BbW91bnQiOjEwMDAwLCJleHAiOjE3OTI3ODE4NzI5OTJ9.dIM_pUsNoMYSSOnUKUtXqsPjfUiTUQvRFUj5j9UrPJI"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "93242",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:dns-records-lookup-dnspyt",
          "native": true,
          "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
          "quotedLamports": "96126",
          "reference": "BiV5cj89MZTVdR5zx2aWNnT3km9NVETNZpZkFDmfNrTW",
          "session": "eyJhcnRpY2xlSWQiOiJkbnMtcmVjb3Jkcy1sb29rdXAtZG5zcHl0aG9uLWEtbXgtdHh0LW5zLXR0bC1ueGRvbWFpbi1ub2Fuc3dlciIsInJlZmVyZW5jZSI6IkJpVjVjajg5TVpUVmRSNXp4MmFXTm5UM2ttOU5WRVROWnBaa0ZEbWZOclRXIiwicmVjaXBpZW50IjoiN0xTamZySmY4Zk5zQjhWQTl1N04zV0VuMjVzbVFMcG9iM1N2eVV2WGFjeTciLCJtaW50IjpudWxsLCJtaW5BbW91bnQiOjkzMjQyLCJleHAiOjE3OTI3ODE4NzI5OTJ9.7TPXgunFZ5lpKFdLCQvMCh-VJh_UBuELLKf4v5bl1yA",
          "solUsdPrice": 104.03
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "DNS lookups in Python with dnspython - A, MX, TXT, NS with TTLs, NXDOMAIN vs NoAnswer vs Timeout, propagation, SPF and DMARC records",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "body": "Executed against a public resolver (1.1.1.1) for a real domain: A, MX, TXT, NS answers with TTLs from 300 to 86400 seconds, NoAnswer for CNAME on a name that has none, NXDOMAIN for a random subdomain, and SPF text records.",
              "c": "Self-Hosting & Infra",
              "id": "dns-records-lookup-dnspython-a-mx-txt-ns-ttl-nxdomain-noanswer",
              "t": "DNS Lookups in Python with dnspython: A, MX, TXT, NS, TTL, NXDOMAIN vs NoAnswer and Resolver Choice"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "body": {
                      "description": "Main body text",
                      "type": "string"
                    },
                    "c": {
                      "description": "Category of the guide",
                      "type": "string"
                    },
                    "id": {
                      "description": "Identifier of the record",
                      "type": "string"
                    },
                    "license": {
                      "description": "License identifier",
                      "type": "string"
                    },
                    "price": {
                      "description": "Price",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "t": {
                      "description": "Title of the guide",
                      "type": "string"
                    }
                  },
                  "required": [
                    "id",
                    "t",
                    "c",
                    "body"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-23T18:55:53.028Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-23T18:55:52.768Z"
    },
    "resource": "https://saylorinnovations.com/api/kb/dns-records-lookup-dnspython-a-mx-txt-ns-ttl-nxdomain-noanswer",
    "serviceName": "Saylor Innovations Guide Library",
    "tags": [
      "dns",
      "dnspython",
      "python",
      "networking",
      "debugging"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "DNS lookups in Python with dnspython - A, MX, TXT, NS with TTLs, NXDOMAIN vs NoAnswer vs Timeout, propagation, SPF and DMARC records"
}

What the leaf hashes

{"body":"0014b9a5c72ec76f0e23a95672159692c79080ba656cde9ae41567bd1534fefe","id":120105,"kind":"listing","method":"baseline/1","observed_us":1793025617354756,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/kb/dns-records-lookup-dnspython-a-mx-txt-ns-ttl-nxdomain-noanswer","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (296695 rows).

  1. 0x1dc45b1382210f58f49168e9849d83fef8c24232f41b638041d3d899e730ca49
  2. 0x17a0cb1f0916adcc94e7e6960c48823032b0d4e9d221ffd0e6e4a0cb7156e544
  3. 0xaf5932c07623c640f5b24195c2cb49a6b7f700ac35f1b62e68259bc6108b7db5
  4. 0xd4b7b007084e76bfcdaeeaae414a44990e704ca63a6c87e665ac46baa4d5572b
  5. 0x24d467943346a010d8dee965159a0d91a4a8f0fb1c810c366d7eb4450c81f7a2
  6. 0xb13a716d8b6d24190f2afce98671f392a7bd03c1acc3f526b3139079c542877c
  7. 0x135753448319d02de2946375287a30e1e6f970ef970275b0ddd6580c15eba24a
  8. 0x73c3bc96d9f79ce7e5bc851e37ddb01d839f0c7be3e8eb58b942decbc4319055
  9. 0xe85b2c05abdf635cb7cb0997b20ea577db07b2f799012dcfafbf93151dfe1bb0
  10. 0x667c9edc7131bd388a1c1a039f7fddf0a4fbc13b4f1e7297601127a46cdc7292
  11. 0xf0f77ed1d484625ddaf2f6e58baa64c9dec47a22b1a6beb91219a17bddac7dfa
  12. 0x8e3531af6dd328ff9a174dd19751228f67fa0773c68a89edf859dffbd7b098c3
  13. 0x42b0d9d5b53af5b0fe99cee10ce29fe484db78b92ce49f97190cc6d098651d47
  14. 0x9dfd312f3d4937f7cb144cee3987e8516f222932b4ea286605236d73cfa1ed16
  15. 0xc3a6a3ae44ec0da1848b16d40c45d7aac97a67352eea8df18e0f26edabea8a2f
  16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
  17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
  18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON