← The evidence ledger
Evidence row 120484
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://saylorinnovations.com/api/papers/paper
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- dc98c8558ae5fb163b897cc1e77f8ef1658292355c94fae79c5f1623acfc2825
- Leaf
- 0x3e385decd7e9a2de5650c5326e85eeadb005572fdeadd3f6ee82848827b7e58f
What was observed
{
"endpoints": [
[
"x402",
"https://saylorinnovations.com/api/papers/paper"
]
],
"name": "Saylor Innovations Papers",
"owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
"raw": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"facilitatorOnly": true,
"memo": "saylor:papers:paper",
"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": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP",
"memo": "saylor:papers:paper",
"reference": "9kc3u7p3nvyLsyLvzXqgizq3YJpa7Z2u4pqBG9Byy96i",
"session": "eyJhcnRpY2xlSWQiOiJwYXBlcnM6cGFwZXIiLCJyZWZlcmVuY2UiOiI5a2MzdTdwM252eUxzeUx2elhxZ2l6cTNZSnBhN1oydTRwcUJHOUJ5eTk2aSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyMzI2Njg5NTk2fQ.h178wDh7FTPfLjFBwfoaGSNt82m9zjP_9Fp65SBdyWE"
},
"maxTimeoutSeconds": 120,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
"scheme": "exact"
}
],
"description": "Paper lookup by DOI, arXiv id, PMID or OpenAlex id - abstract, authors, venue and citations",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"id": "2005.11401"
},
"type": "http"
},
"output": {
"example": {
"abstract": "Large pre-trained language models have been shown to store factual knowledge...",
"arxiv_id": "2005.11401",
"authors": [
"Patrick Lewis",
"Ethan Perez"
],
"cited_by": 5200,
"doi": "10.48550/arxiv.2005.11401",
"found": true,
"id": "2005.11401",
"open_access": true,
"pdf_url": "https://arxiv.org/pdf/2005.11401",
"references": 64,
"source": "OpenAlex",
"title": "Retrieval-Augmented Generation for Knowledge-Intensive NLP Tasks",
"venue": "arXiv",
"year": 2020
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
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"properties": {
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"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"queryParams": {
"properties": {
"id": {
"description": "DOI, arXiv id, PMID or OpenAlex W-id (query)",
"type": "string"
}
},
"required": [
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],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"abstract": {
"description": "Abstract text",
"type": [
"string",
"null"
]
},
"arxiv_id": {
"description": "arXiv identifier",
"type": [
"string",
"null"
]
},
"authors": {
"description": "Author names",
"type": [
"array",
"null"
]
},
"categories": {
"description": "Categories",
"type": [
"array",
"null"
]
},
"cited_by": {
"description": "Number of citations received",
"type": [
"number",
"null"
]
},
"cited_by_note": {
"description": "Cited by note",
"type": [
"string",
"null"
]
},
"comment": {
"type": [
"string",
"null"
]
},
"doi": {
"description": "Digital object identifier",
"type": [
"string",
"null"
]
},
"found": {
"description": "True when the lookup matched a record",
"type": "boolean"
},
"id": {
"description": "Identifier of the record",
"type": "string"
},
"journal_ref": {
"description": "Journal ref"
},
"open_access": {
"description": "Open access",
"type": [
"boolean",
"null"
]
},
"openalex_id": {
"description": "Openalex id identifier",
"type": [
"string",
"null"
]
},
"pdf_url": {
"description": "URL of the PDF",
"type": [
"string",
"null"
]
},
"primary_category": {
"description": "Primary category",
"type": [
"string",
"null"
]
},
"published": {
"description": "Publication date",
"type": [
"string",
"null"
]
},
"references": {
"type": [
"number",
"null"
]
},
"source": {
"description": "Data source the values come from",
"type": [
"string",
"null"
]
},
"title": {
"description": "Title",
"type": [
"string",
"null"
]
},
"topic": {
"description": "Topic",
"type": [
"string",
"null"
]
},
"updated": {
"description": "Time the record was last updated",
"type": [
"string",
"null"
]
},
"url": {
"description": "Canonical URL",
"type": [
"string",
"null"
]
},
"venue": {
"description": "Trading venue",
"type": [
"string",
"null"
]
},
"version": {
"description": "Version identifier",
"type": [
"number",
"null"
]
},
"year": {
"description": "Calendar year",
"type": [
"number",
"null"
]
}
},
"required": [
"id",
"found"
],
"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/v1790235422/bazaar-icons/bc5e2b3d111ebbef.jpg",
"lastUpdated": "2026-10-18T12:29:29.637Z",
"quality": {
"l30DaysTotalCalls": 4,
"l30DaysUniquePayers": 4,
"lastCalledAt": "2026-10-18T12:29:29.368Z"
},
"resource": "https://saylorinnovations.com/api/papers/paper",
"serviceName": "Saylor Innovations Papers",
"tags": [
"papers",
"academic",
"research",
"science",
"paper"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Paper lookup by DOI, arXiv id, PMID or OpenAlex id - abstract, authors, venue and citations"
}What the leaf hashes
{"body":"dc98c8558ae5fb163b897cc1e77f8ef1658292355c94fae79c5f1623acfc2825","id":120484,"kind":"listing","method":"baseline/1","observed_us":1793025618133529,"prev":null,"subject":"x402_bazaar:https://saylorinnovations.com/api/papers/paper","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).
- 0x3e37fd5966802c5cfcd93df9051977600b1e8309dc723788c2b9950b79ba5099
- 0xb0dfaf4ad096b5cf34d3d1a35a98b2d8a622e392a5a3c5d2be398a65c368fbbb
- 0xe78f3f0cb15d18048cd28659ce9f73a83ec706d5596c18ed5ede14d06f1d765f
- 0xfbd338e94677f81174d9efa7c7e73789fb1a00eb313de38e20d4afb9b970c4bc
- 0x3e89146e7667a36d30ae7e306295590a9f42cfcb687d9244039c2484d4b40f94
- 0x8ec04bdf3405a3ea8490d9436bfe323cbb22c7eb4d985a2166990b2f1491e42d
- 0x4e537ce754f44652a7dd6b7d0b5f83c96cfba3a39a5a65c4c581b9bba88020c9
- 0x47d5aa59e21ad8286cd3b0a97cd6b5925cf320ec28adf0b872c9b1f11ec798b2
- 0x71cde1f2e46f64433ce26a600644420786ceae66a8a84d9a72f83569bd443be3
- 0x8e5649068bfe1600b5f38cb8d5f950b0cad91a024600039e3ba08f751258e697
- 0xeff3ae4ccee9e9ab663bed39de24a2076950808876228a89701d6ab7f016bd7e
- 0x1afc0318a98c6dbb5a80e5cb86eba22b844e3f3b185a16f17290e29ab7410f55
- 0x215f432600b78f2e7c9629cd10ce6ce4b7f3351b0b71f3f2c7dcb8e650f6cd63
- 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
- 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
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- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae