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Evidence row 120483

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://saylorinnovations.com/api/papers/journals
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
9c6227543963ab89164392ef1324386b872654a55f25ce255629c7b53f127612
Leaf
0x20b93cddd6bb01bc40cc4a37242b97c5859f1c2bb5bd54174884c77813f7d64f

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/papers/journals"
    ]
  ],
  "name": "Saylor Innovations Data Desk",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
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        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:datadesk:doaj-journals",
          "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:datadesk:doaj-journals",
          "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:datadesk:doaj-journals",
          "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"
      },
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          "memo": "saylor:datadesk:doaj-journals",
          "reference": "4doni9UGKSWdyRgdQ2ff4Uk1sP4mxQ56R6s3n71NCcu3",
          "session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpkb2FqLWpvdXJuYWxzIiwicmVmZXJlbmNlIjoiNGRvbmk5VUdLU1dkeVJnZFEyZmY0VWsxc1A0bXhRNTZSNnMzbjcxTkNjdTMiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM3OTU4NTU4NX0.1MbxHYmFORubZ4x_FCjLarzl1S6w1y5MmtSVXUQILG4"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "memo": "saylor:datadesk:doaj-journals",
          "reference": "9M99Pzzzj3bna7piK71jam52d4DViKXZ4M3zUFLEF8Eg",
          "session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpkb2FqLWpvdXJuYWxzIiwicmVmZXJlbmNlIjoiOU05OVB6enpqM2JuYTdwaUs3MWphbTUyZDREVmlLWFo0TTN6VUZMRUY4RWciLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjM3OTU4NTU4NX0.UN5hewltAh2h5Eb75MuTtdStPm9pyLUqg-UtwqQ-brE"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "92082",
        "asset": "So11111111111111111111111111111111111111112",
        "extra": {
          "memo": "saylor:datadesk:doaj-journals",
          "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": "94930",
          "reference": "Catak2FBpQRJf46fjMuNWk8XvJkXZmQVdujv93wegFmi",
          "session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpkb2FqLWpvdXJuYWxzIiwicmVmZXJlbmNlIjoiQ2F0YWsyRkJwUVJKZjQ2ZmpNdU5XazhYdkprWFptUVZkdWp2OTN3ZWdGbWkiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTIwODIsImV4cCI6MTc5MjM3OTU4NTU4NX0.9STMHvU2lA8OCKiPGCQ0HM6Ed5V3wGnPQAanIrG83NM",
          "solUsdPrice": 105.34
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Search DOAJ open-access journals by topic, title or ISSN - publisher, country, subjects, license, APC charge and maximum fee, peer review type and seal",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "limit": "5",
              "q": "machine learning"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "count": 5,
              "journals": [
                {
                  "apc_max": null,
                  "charges_apc": false,
                  "country": "CN",
                  "doaj_id": "0161de6d312246648625e9182d5c64f8",
                  "issn_electronic": "2097-406X",
                  "issn_print": "2096-0654",
                  "languages": [
                    "EN"
                  ],
                  "license": [
                    "CC BY"
                  ],
                  "peer_review": [
                    "Single anonymous peer review"
                  ],
                  "publisher": "Tsinghua University Press",
                  "seal": false,
                  "subjects": [
                    "Electronic computers. Computer science"
                  ],
                  "title": "Big Data Mining and Analytics",
                  "url": "https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8254253"
                },
                {
                  "apc_max": {
                    "currency": "USD",
                    "price": 700
                  },
                  "charges_apc": true,
                  "country": "CN",
                  "doaj_id": "029b1d87b5fa46d8b17d5c6f21b986fc",
                  "issn_electronic": "2666-6510",
                  "issn_print": null,
                  "languages": [
                    "EN"
                  ],
                  "license": [
                    "CC BY",
                    "CC BY-NC-ND"
                  ],
                  "peer_review": [
                    "Single anonymous peer review"
                  ],
                  "publisher": "KeAi Communications Co. Ltd.",
                  "seal": false,
                  "subjects": [
                    "Electronic computers. Computer science"
                  ],
                  "title": "AI Open",
                  "url": "https://www.keaipublishing.com/en/journals/ai-open/"
                },
                {
                  "apc_max": {
                    "currency": "USD",
                    "price": 2000
                  },
                  "charges_apc": true,
                  "country": "US",
                  "doaj_id": "05a529c49a134dbdaed034f7c8e76468",
                  "issn_electronic": "2576-9898",
                  "issn_print": "2576-988X",
                  "languages": [
                    "EN"
                  ],
                  "license": [
                    "CC BY",
                    "CC BY-NC-ND"
                  ],
                  "peer_review": [
                    "Single anonymous peer review"
                  ],
                  "publisher": "Engineered Science Publisher LLC",
                  "seal": false,
                  "subjects": [
                    "Engineering (General). Civil engineering (General)"
                  ],
                  "title": "Engineered Science",
                  "url": "https://www.espublisher.com/journals/id/engineered-science"
                },
                {
                  "apc_max": {
                    "currency": "USD",
                    "price": 1400
                  },
                  "charges_apc": true,
                  "country": "GB",
                  "doaj_id": "0771eefc8e144548ad478127e1119105",
                  "issn_electronic": "2667-2596",
                  "issn_print": null,
                  "languages": [
                    "EN"
                  ],
                  "license": [
                    "CC BY",
                    "CC BY-NC-ND"
                  ],
                  "peer_review": [
                    "Double anonymous peer review"
                  ],
                  "publisher": "Elsevier",
                  "seal": false,
                  "subjects": [
                    "Probabilities. Mathematical statistics",
                    "Applied mathematics. Quantitative methods"
                  ],
                  "title": "Sustainability Analytics and Modeling",
                  "url": "https://www.sciencedirect.com/journal/sustainability-analytics-and-modeling"
                },
                {
                  "apc_max": {
                    "currency": "USD",
                    "price": 2230
                  },
                  "charges_apc": true,
                  "country": "GB",
                  "doaj_id": "082d5de8b56948ee9aa223b37fc4315a",
                  "issn_electronic": "2667-0968",
                  "issn_print": null,
                  "languages": [
                    "EN"
                  ],
                  "license": [
                    "CC BY",
                    "CC BY-NC",
                    "CC BY-NC-ND"
                  ],
                  "peer_review": [
                    "Double anonymous peer review"
                  ],
                  "publisher": "Elsevier",
                  "seal": false,
                  "subjects": [
                    "Information technology"
                  ],
                  "title": "International Journal of Information Management Data Insights",
                  "url": "https://www.sciencedirect.com/journal/international-journal-of-information-management-data-insights"
                }
              ],
              "note": "Journals indexed in the Directory of Open Access Journals; apc_max is the highest article processing charge the journal declares.",
              "query": "machine learning",
              "source": "DOAJ",
              "total": 128
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
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                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "limit": {
                      "description": "optional 1-25, default 10",
                      "type": "string"
                    },
                    "q": {
                      "description": "Topic, title or ISSN",
                      "type": "string"
                    }
                  },
                  "required": [
                    "q"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "count": {
                      "description": "Number of items returned",
                      "type": "number"
                    },
                    "journals": {
                      "description": "Open-access journals with title, publisher, country, licence, APC charge, subjects and ISSNs",
                      "items": {
                        "properties": {
                          "apc_max": {
                            "description": "Apc max"
                          },
                          "charges_apc": {
                            "description": "Charges apc"
                          },
                          "country": {
                            "description": "Country name"
                          },
                          "doaj_id": {
                            "description": "Doaj id identifier"
                          },
                          "issn_electronic": {
                            "description": "Issn electronic"
                          },
                          "issn_print": {
                            "description": "Issn print"
                          },
                          "languages": {
                            "description": "Languages"
                          },
                          "license": {
                            "description": "License identifier"
                          },
                          "peer_review": {
                            "description": "Peer review"
                          },
                          "publisher": {
                            "description": "Publisher of the journal",
                            "type": [
                              "string",
                              "null"
                            ]
                          },
                          "seal": {
                            "description": "True when the journal holds the DOAJ Seal",
                            "type": [
                              "boolean",
                              "null"
                            ]
                          },
                          "subjects": {
                            "description": "Subject classifications",
                            "type": [
                              "array",
                              "null"
                            ]
                          },
                          "title": {
                            "description": "Title"
                          },
                          "url": {
                            "description": "Canonical URL"
                          }
                        },
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "note": {
                      "description": "Caveat or context for reading the result",
                      "type": "string"
                    },
                    "query": {
                      "description": "The query as the server interpreted it",
                      "type": "string"
                    },
                    "source": {
                      "description": "Data source the values come from",
                      "type": "string"
                    },
                    "total": {
                      "description": "Total number of matching items",
                      "type": "number"
                    }
                  },
                  "required": [
                    "query",
                    "journals"
                  ],
                  "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": "2026-10-19T03:11:05.624Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-19T03:11:05.278Z"
    },
    "resource": "https://saylorinnovations.com/api/papers/journals",
    "serviceName": "Saylor Innovations Data Desk",
    "tags": [
      "open access journals about",
      "journal article processing",
      "doaj journal lookup by issn",
      "find a journal to publish in",
      "creative commons open access"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Search DOAJ open-access journals by topic, title or ISSN - publisher, country, subjects, license, APC charge and maximum fee, peer review type and seal"
}

What the leaf hashes

{"body":"9c6227543963ab89164392ef1324386b872654a55f25ce255629c7b53f127612","id":120483,"kind":"listing","method":"baseline/1","observed_us":1793025618132299,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/papers/journals","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. 0x20b9b67e3e3c71afffb360c96a0a39bd91f37d6aa55342f6805a8d4a2999a11f
  2. 0xa54586cba111765ca96df11df373cc4061e24ec3a70ee22ad66906f892638072
  3. 0x3b4e8788e3bebc03bd260d140b94554123968ea8951d3a22d84974257e7a69fe
  4. 0x741cae759e958b0e310aa3d956f539878f37f6ebc04ade961868b288f1653a2a
  5. 0x01059b4b5789fc0be0754ab790b10bdba7a68717efff63ff87e608777f88bca6
  6. 0x2d9285b278d562dc07b2a42319f3ce7c88a8684f2714ae459da3f62f36b44950
  7. 0x3a7a1b35a8d7a8eda563cbd4bbd0e979565becbadd654cb9685f8bfb99ebb3e3
  8. 0x4aafb9da62999ff0d3196ba2039057e2458aa0c13b472387c10cab657503c964
  9. 0x3a4eb87f6cf56a6e6ec9d0649362f4406ff949fb6d435931429feef859d64141
  10. 0x079e691201f8fe8ea3718cede784dde70b1316094e3ad526df647841955fcee3
  11. 0x057e71ed555693238850b77237df28dd2661cf85c88138365b7e42941201ad01
  12. 0xfde157310fc8513767b162378ca9ceefb2937c374b7381a8887f7ccba8ab5a80
  13. 0x9d75d4d3ab6219edefa04be60b32fdd56be7a7672f370a5115f02f7b098ecd27
  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