Evidence row 60344

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://2s.io/api/papers/search"
    ]
  ],
  "name": "2s",
  "owner_address": "0x2b6d4988db4723e6908db86ab2b8dfbc51fc32c5",
  "raw": {
    "accepts": [
      {
        "amount": "6000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5",
        "scheme": "exact"
      },
      {
        "amount": "6000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
          "name": "USDC",
          "version": "1"
        },
        "maxTimeoutSeconds": 60,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn",
        "scheme": "exact"
      }
    ],
    "description": "Unified scientific literature search across arXiv (preprints), PubMed (biomedical), and Semantic Scholar (cross-field, with citation counts). Returns a flat array of papers with stable schema: source, sourceId, doi, title, authors, abstract, year, publishedAt, citationCount, url, pdfUrl. Partial failures surface in the errors array rather than failing the whole call. Optional filters: since (YYYY-MM-DD), sources (subset), limit (max 20 per source).",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "limit": 10,
              "q": "example",
              "since": "2024-01-01",
              "sources": "example"
            },
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "properties": {
                "method": {
                  "const": "GET"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "limit": {
                      "default": 10,
                      "maximum": 20,
                      "minimum": 1,
                      "type": "integer"
                    },
                    "q": {
                      "maxLength": 500,
                      "minLength": 1,
                      "type": "string"
                    },
                    "since": {
                      "type": "string"
                    },
                    "sources": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "q"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method",
                "queryParams"
              ],
              "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/v1781454341/bazaar-icons/58f7ba8f2b3b8047.png",
    "lastUpdated": "2026-10-22T05:40:38.712Z",
    "quality": {
      "l30DaysTotalCalls": 41,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-22T05:41:27.39Z"
    },
    "resource": "https://2s.io/api/papers/search",
    "serviceName": "2s",
    "tags": [
      "public-records",
      "identifiers",
      "ai-agents",
      "us-gov-data",
      "x402"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Unified scientific literature search across arXiv (preprints), PubMed (biomedical), and Semantic Scholar (cross-field, with citation counts). Returns a flat array of papers with stable schema: source, sourceId, doi, title, authors, abstract, year, publishedAt, citationCount, url, pdfUrl. Partial failures surface in the errors array rather than failing the whole call. Optional filters: since (YYYY-MM-DD), sources (subset), limit (max 20 per source)."
}

What the leaf hashes

{"body":"38f6fcd27ea45f4cd22ab1bd5ec23ec81fc65c71490267c209354027e1402c8a","id":60344,"kind":"listing","method":"baseline/1","observed_us":1793025448354739,"prev":null,"subject":"x402_bazaar:https://2s.io/api/papers/search","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. 0xf391ecfdd99901f83e0611a3b2e89622fd93423d7b5fc449563c67775e49197b
2. 0xb7ce15b19c70304086602b45258e9266d726bddff8521a465398afb0d48859e7
3. 0xeb5442cec68bf3fb1c59dd22c7c104b64fcf33d6bbd72c3a657ba17a3bea59e4
4. 0x22c8d4fef466814bbbcfee3bc61bb653705922caeb6867754e015a3a87d2dd47
5. 0x361d47b08c139b183593064478b36eee78f5e606341d95815003a88ab4d0dc34
6. 0xc6535432228ea6279250f5346f57a25ad03e5a8533e65a35066a8920f439775d
7. 0xa8fa2434d679ffc1b3e758b015877e84f49561285cd468a1817ed2819c4fe763
8. 0xf16e9f2e89173a3b88cb8d6ab03a0d57b99fb3291dac0168eb209cd6efa0263b
9. 0x360b9514f6911ebbca63a4a540018824f2b21ab20676b25f31c3329d87570c07
10. 0x67f025e785d862e818e533cc91b12de424ba2fa38e9f06f58b81ae8c82da1146
11. 0xc50899a255d8f2b1b1fc55129b98f94521e73c5252d7c947abcfcdde2955260c
12. 0x3e439c99553dde4ddc1a9189bc043fa92a4b6b41e39e7e6b21c10148f9558a78
13. 0xa26f0437cba4d7d64f1cf98bf4f490e1ebb6f66a5e2331537b7ba8b3061084e0
14. 0xd769d41500075835c3b2f9184d223699fb983fd05c29fbcb44d964abc7ee380d
15. 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae