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Evidence row 2204774

Observed , by sync.x402_bazaar/1.

Kind
listing
About
source_record x402_bazaar:https://2s.io/api/papers/search
Recorded
Previous row
#1792162
Body SHA-256
4a7e59350e21d5ab214949382d7e6eac5f93e71c0ae364587160472d9316ecf5
Leaf
0x8634667f97888ade96a435055c7261bade554ffc9d1162b808c4c13e41ffb99c

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": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "properties": {
                "method": {
                  "const": "GET"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "limit": {
                      "default": 10,
                      "maximum": 20,
                      "minimum": 1,
                      "type": "integer"
                    },
                    "q": {
                      "maxLength": 500,
                      "minLength": 1,
                      "type": "string"
                    },
                    "since": {
                      "type": "string"
                    },
                    "sources": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "q"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method",
                "queryParams"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "payment-identifier": {
        "info": {
          "required": false
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "id": {
              "maxLength": 128,
              "minLength": 16,
              "pattern": "^[a-zA-Z0-9_-]+$",
              "type": "string"
            },
            "required": {
              "type": "boolean"
            }
          },
          "required": [
            "required"
          ],
          "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": "2026-11-01T10:27:35.817Z",
    "quality": {
      "l30DaysTotalCalls": 40,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-11-01T10:27:35.567Z"
    },
    "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":"4a7e59350e21d5ab214949382d7e6eac5f93e71c0ae364587160472d9316ecf5","id":2204774,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646933977248,"prev":1792162,"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 (444186 rows).

  1. 0x86349cb0e3b20249c5cd3378b9f2285ffa7cfcd7928d24d322a6a7f6aefb6188
  2. 0x1f72d7db42a8dd081cba826c67c382a467c22ab5ea45f9ad7f5199fbfdd81671
  3. 0x978c4ec191efe43c403563449ad4d3547455409285b686f0e7f48e4dc530d448
  4. 0xe6171b14e9bd2df5c7c1b3d9ff8d47802216cffb521d3b72a9edb23d0df060a0
  5. 0xd4ee74e9f9ba867d243b7ddb72cba1b74bacba193a4c4c9b2d3688fe1c136736
  6. 0x01bdadb3107aae4612c9a927aca3f490f6680ec984107c75febb70fcdce48e6c
  7. 0x6808d920c9a4ad4fb267afd21ca08b33789cc7f8984784e0f516d298c677c7e7
  8. 0x24d75aacd77e6d5be2903c8c3f994caec3074e7d7207fd2d9c1eec2733b543fd
  9. 0x4578575e9e9699f1ecbcb6eff25bae8955aeaf20fa8217d01518204bf6c0b8e6
  10. 0x392e16c4c8f283bf9e420e9a0ff4ad4facea172731b644bf7ac8ba8e7d9405e4
  11. 0xe4cfdb5ca803a75305e0b030241b6a1938e198905c1bdf3b3578fd8cabde60ac
  12. 0xe411f7e720673ba3ec5e17cf225d7b613794f2c0fc54fc3c10f61996c290e915
  13. 0x01026267e0e47b54aad32519d39da32ac6f5740a40f20ce4f9f7312a7268ad12
  14. 0x45296e5ab7be6d8163e528d05039d4c685fc8962fc80b797c1d68574b10b444c
  15. 0x510fa2c647d18bb802da12cf41e17d136163e6624e69ed77e15235c4284b69c7
  16. 0x5e23ec5954c11a4530aab8c635a72b12bcfeb6fcb03c6cb1a990cc1743424543
  17. 0x1805ef693fbdb2c23fcb61616f830408ca89bec1dc5b68ee47a770ffc0b9760a
  18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
  19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e
Day root
0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
Chained
0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
Published
On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af

How to check it · This row as JSON