Evidence row 1262496

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://agents.crowdspark.me/v1/research/papers"
    ]
  ],
  "name": "Agent Tools",
  "owner_address": "0x0dea0030a17bf886543a757c55924710258c2eec",
  "raw": {
    "accepts": [
      {
        "amount": "6000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x0dEA0030A17BF886543a757c55924710258c2eec",
        "scheme": "exact"
      }
    ],
    "description": "Free tier: 25 calls/day per IP with header X-Free-Call: 1 (or ?free=1), then pay per call. Scholarly paper search for research agents: keywords or a DOI in, matching papers out with title, authors, year, venue, DOI, citation count, open access PDF or page link, retraction flag and abstract. Filter by year range and open access, sort by relevance, citations or newest. Source OpenAlex, Crossref fallback.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "from_year": "2023",
              "limit": "3",
              "q": "retrieval augmented generation",
              "sort": "citations"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "papers": [
                {
                  "abstract": "A short abstract of the paper.",
                  "authors": [
                    "A. Author",
                    "B. Author"
                  ],
                  "authors_total": 2,
                  "citations": 181,
                  "doi": "10.1234/example.5678",
                  "doi_url": "https://doi.org/10.1234/example.5678",
                  "open_access": true,
                  "open_access_url": "https://arxiv.org/pdf/0000.00000",
                  "retracted": false,
                  "title": "Example paper on retrieval augmented generation",
                  "venue": "Example Journal",
                  "year": 2024
                }
              ],
              "returned": 1,
              "source": "OpenAlex (CC0)",
              "total_matches": 136358
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "from_year": {
                      "description": "Optional earliest year, e.g. 2020",
                      "type": "string"
                    },
                    "limit": {
                      "description": "1 to 25, default 10",
                      "type": "string"
                    },
                    "open_access": {
                      "description": "true to keep only open access papers",
                      "type": "string"
                    },
                    "q": {
                      "description": "Search words, or a DOI such as 10.1038/nature14539",
                      "type": "string"
                    },
                    "sort": {
                      "enum": [
                        "relevance",
                        "citations",
                        "newest"
                      ],
                      "type": "string"
                    },
                    "to_year": {
                      "description": "Optional latest year",
                      "type": "string"
                    }
                  },
                  "required": [
                    "q"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-30T00:21:13.857Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-30T00:21:13.706Z"
    },
    "resource": "https://agents.crowdspark.me/v1/research/papers",
    "serviceName": "Agent Tools",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Free tier: 25 calls/day per IP with header X-Free-Call: 1 (or ?free=1), then pay per call. Scholarly paper search for research agents: keywords or a DOI in, matching papers out with title, authors, year, venue, DOI, citation count, open access PDF or page link, retraction flag and abstract. Filter by year range and open access, sort by relevance, citations or newest. Source OpenAlex, Crossref fallback."
}

What the leaf hashes

{"body":"4eeb44e3efafa6e4f816b8d0cb19c5338031e30153e9fb4eed4bb7391663beac","id":1262496,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793385564308174,"prev":1039609,"subject":"x402_bazaar:https://agents.crowdspark.me/v1/research/papers","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-30 (243099 rows).

1. 0x01e03c7f4062591d3b69086b90ebaf140fc18c201068ef6eba0c4d0ea410d375
2. 0x0d6e64981c78fdbf064986c35af825881cc8b88d4af903a36d0b9b5c2e9dceaa
3. 0xa80e6cef33b3899b57227f76db7b11fb7f932d56892ac704c78f4d75f1e9ebdd
4. 0x3078643e7c25798f0439e2d03d0e8251ce5b2c3092826e7a6a27a098303ce1aa
5. 0x84b2dae8b86bd286947d98b782cfd521050a71d3b68440591a6557f27ae45b27
6. 0xa2a0553dceec645abf300ac28552fc7f52e8fc9c4b3436d45b06974693ede0b5
7. 0x55642a442c198dea40e0f6e5738f999db9b8a0000dd561203dfe96f1a9e5162d
8. 0xd9eb7c12ab2b463f88853edca503beef1a1acea821aa7067b5d20ddf126012ad
9. 0xa3239b1758f1242064e68c235f5c0b4df82f3cb19d19d9f8db3c360fe9786b17
10. 0x7db0cf99a788dc4e95823f51f689feacd2f07d7332ef47f569bfae547109bcc7
11. 0x256ccea52830a2f036ac76722bbd7e46abea7259dbca5fe029d16d53cfa364a9
12. 0xa1dcaffedf43b192df0f719c0ec805edaa925c119720ae9f42171aca5e2875c3
13. 0x5265c50f3937a978a97dcf6529a74471a0814f84b7759709755dc93a22996c34
14. 0xa0c9900ba7512d3a576c15bf6cc53f55a0645d9bf9b4e2e4c1760d00af98e761
15. 0x2b7a05865245feaf40ea40b73e02d86357af2dcbac9c7b992f1420f5eaa15246
16. 0xe2a9872e1b6a01c55a7a8cc5c05c61f3933255db5c26b9c79be4011d28685b52
17. 0xb0c9ef42e725578748f3119c9dbebf2fc437266bda013df29f98ed3ebe621403
18. 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861