← The evidence ledger
Evidence row 19399
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://api.fastaf.co/x402/v1/scholar
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- ab96fda04fc2077ec3bcb0fa7de9f30c46fde489e1dace59eab6a932d0e1406f
- Leaf
- 0x8dcd7926dc3f33b0cdced83eb4a33c9066830a1b7949e94ff1c89c54ce2d57dd
What was observed
{
"endpoints": [
[
"x402",
"https://api.fastaf.co/x402/v1/scholar"
]
],
"name": "FastAF",
"owner_address": "0x05b75e13f071a09a26b50a18ce5bd02a0755d76f",
"raw": {
"accepts": [
{
"amount": "5000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0x05B75e13f071A09A26B50a18Ce5BD02a0755d76F",
"scheme": "exact"
}
],
"description": "Academic paper and citation search API for AI agents: Google Scholar results as JSON with titles, publication details, snippets, paper links and cited-by counts when available. Supports topic queries, citation lookup and year filters for literature research. Provided by FastAF Google Scholar Search. Price: $0.005000 USDC per successful call.",
"extensions": {
"bazaar": {
"info": {
"docsUrl": "https://fastaf.co/apis/google-scholar-api/",
"homepage": "https://fastaf.co",
"input": {
"method": "GET",
"queryParams": {
"as_yhi": "2026",
"as_ylo": "2020",
"language": "en",
"query": "retrieval augmented generation"
},
"type": "http"
},
"openApiUrl": "https://api.fastaf.co/openapi.json",
"output": {
"example": {
"scholar_results": [
{
"displayed_link": "P Lewis et al. - NeurIPS, 2020",
"inline_links": {
"cited_by": {
"cites_id": "1234567890123456789",
"total": "Cited by 120"
}
},
"snippet": "A retrieval-augmented model combines a language model with a searchable document index.",
"title": "Retrieval-Augmented Generation for Knowledge-Intensive NLP Tasks",
"title_link": "https://arxiv.org/abs/2005.11401"
}
]
},
"type": "json"
},
"website": "https://fastaf.co"
},
"metadata": {
"provider": {
"description": "FastAF: Web data for AI agents, pay per call in USDC via x402, no account: Google search, Maps, News, Shopping, Scholar, Jobs, AI Mode, Amazon, eBay, Walmart, Zillow, YouTube transcripts, public LinkedIn/X profiles, scraping and screenshots.",
"docsUrl": "https://fastaf.co/apis/google-scholar-api/",
"homepage": "https://fastaf.co",
"name": "FastAF",
"openApiUrl": "https://api.fastaf.co/openapi.json",
"website": "https://fastaf.co"
}
},
"routeTemplate": "/x402/v1/scholar",
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"description": "Academic paper and citation search API for AI agents: Google Scholar results as JSON with titles, publication details, snippets, paper links and cited-by counts when available. Supports topic queries, citation lookup and year filters for literature research.",
"properties": {
"docsUrl": {
"format": "uri",
"type": "string"
},
"homepage": {
"format": "uri",
"type": "string"
},
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"anyOf": [
{
"required": [
"query"
]
},
{
"required": [
"cites"
]
},
{
"required": [
"cluster"
]
}
],
"description": "Academic topic search with language and publication-year filters; citation or cluster IDs can replace query.",
"examples": [
{
"as_yhi": "2026",
"as_ylo": "2020",
"language": "en",
"query": "retrieval augmented generation"
}
],
"properties": {
"as_rr": {
"description": "Review-paper filter: string 1 returns review articles only, 0 all article types (default 0). No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
},
"as_sdt": {
"description": "Scholar search/filter codes: 0 excludes patents (default), 7 includes patents, 4 selects US case law. Court codes can follow 4, e.g. 4,33,192. No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
},
"as_vis": {
"description": "Citation-only results: string 1 excludes them, 0 includes them (default 0). No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
},
"as_yhi": {
"description": "Inclusive latest publication year as a four-digit string, e.g. 2026. Omit for no upper year bound; may combine with as_ylo. No option surcharge; 5 credits per successful request.",
"examples": [
"2026"
],
"maxLength": 8192,
"type": "string"
},
"as_ylo": {
"description": "Inclusive earliest publication year as a four-digit string, e.g. 2020. Omit for no lower year bound; may combine with as_yhi. No option surcharge; 5 credits per successful request.",
"examples": [
"2020"
],
"maxLength": 8192,
"type": "string"
},
"cites": {
"description": "Scholar article ID for a Cited by lookup, copied from a Scholar result. May combine with query to filter citing papers, but not cluster. No default. No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
},
"cluster": {
"description": "Scholar article cluster ID for an All versions lookup. Use instead of query/cites, never together; no default. No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
},
"filter": {
"description": "Duplicate/omitted-result filtering: string 1 enables it (default); 0 includes similar and normally omitted results. No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
},
"html": {
"description": "Return raw source HTML instead of parsed JSON when true; true/false, default false. No option surcharge; 5 credits per successful request.",
"type": "boolean"
},
"language": {
"description": "Result/interface language code, e.g. en, es, fr or de; default en. Use lr, where supported, to restrict document languages. No option surcharge; 5 credits per successful request.",
"examples": [
"en"
],
"maxLength": 8192,
"type": "string"
},
"lr": {
"description": "Document-language filter: lang_en or a pipe-separated list such as lang_en|lang_fr. Omitted: no explicit language restriction. No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
},
"page": {
"description": "Zero-based results page: 0 is the first page, 1 the second; non-negative integer, default 0. Each page is a separate request. No option surcharge; 5 credits per successful request.",
"minimum": 0,
"type": "integer"
},
"query": {
"description": "Scholar search text, supporting author: and source:. Required unless cites or cluster is supplied. May refine cites results; cannot combine with cluster. No default. No option surcharge; 5 credits per successful request.",
"examples": [
"retrieval augmented generation"
],
"maxLength": 8192,
"type": "string"
},
"results": {
"description": "Requested results per Scholar page, integer at least 1; omitted: source-default page size. Google may return fewer; not a count of separately billed requests. No option surcharge; 5 credits per successful request.",
"minimum": 1,
"type": "integer"
},
"safe": {
"description": "Adult-content filter: active enables SafeSearch; off disables it (default off). No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
},
"scisbd": {
"description": "Scholar result mode: string 1 requests abstract results, 0 all results. Omitted: source-default result mode. No option surcharge; 5 credits per successful request.",
"maxLength": 8192,
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"openApiUrl": {
"format": "uri",
"type": "string"
},
"output": {
"properties": {
"example": {
"additionalProperties": true,
"description": "Google Scholar JSON. scholar_results includes title_link, displayed_link publication text, snippet and inline_links.cited_by with a textual total and cites_id when available.",
"properties": {
"scholar_results": {
"items": {
"additionalProperties": true,
"properties": {
"displayed_link": {
"type": "string"
},
"inline_links": {
"additionalProperties": true,
"properties": {
"cited_by": {
"additionalProperties": true,
"properties": {
"cites_id": {
"type": "string"
},
"total": {
"type": "string"
}
},
"type": "object"
}
},
"type": "object"
},
"snippet": {
"type": "string"
},
"title": {
"type": "string"
},
"title_link": {
"type": "string"
}
},
"type": "object"
},
"type": "array"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
},
"website": {
"format": "uri",
"type": "string"
}
},
"required": [
"input"
],
"title": "FastAF Google Scholar Search",
"type": "object"
}
}
},
"lastUpdated": "2026-10-26T01:24:30.973Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 2,
"lastCalledAt": "2026-10-26T01:24:30.495Z"
},
"resource": "https://api.fastaf.co/x402/v1/scholar",
"serviceName": "FastAF",
"tags": [
"data",
"scraping",
"web-data",
"api",
"agents"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Academic paper and citation search API for AI agents: Google Scholar results as JSON with titles, publication details, snippets, paper links and cited-by counts when available. Supports topic queries, citation lookup and year filters for literature research. Provided by FastAF Google Scholar Search. Price: $0.005000 USDC per successful call."
}What the leaf hashes
{"body":"ab96fda04fc2077ec3bcb0fa7de9f30c46fde489e1dace59eab6a932d0e1406f","id":19399,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025331664180,"prev":null,"subject":"x402_bazaar:https://api.fastaf.co/x402/v1/scholar","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).
- 0x8dcda2503c3036e1cd7fbd2388af9b675f5429a396870ea2661d6ff0889e2d50
- 0xbd10a13ab0f603148f35d6aca8d0eb34ffba9d9d55d58b39aefc673362aefd06
- 0x5313a6871e64025d8fa0dbeff70890099d5cce1a5d7e645984b1abfffc569334
- 0xb4d650931cb532a6fa7a6c14fd5fa69e0a997eb216a8be7b589bd358ef329142
- 0x9fa6bcf6f493494358173117a387d1fc4d283bde29c69dc942e597981c6ed4b4
- 0xd0922de05b62ccb4c4102ba585d08a119bfe5cf7244a7dabf5384db1238778e2
- 0xc1258b03912e4c08302f82fce7a430d2b2d4fb84ba78f66a15ff13c8f5fc9beb
- 0xec2c45338731519906eda1b1433e0ec120949dc1a57517af1a59e25ff2f07242
- 0x8c4ff1cbe582f339c42398efe692723d46d9d38dd3214e5662bf7395301d2e74
- 0xcd309087e391a4bbf7ab28b9f7073de601c743989827ee9f4afe481b1c005fc6
- 0x6880847de0a4b4b8c14408244df84ff11ac20d4049a575846d0700a7a91132ca
- 0x59a4efa65a01e4e2abdb3b8b7bb673db6d1c72e0f9d52dd2f94777b14a5b061c
- 0xc0cb184c9bdf71abcf18fda97bd59289153d120dbf8fee9f517b63bf303deb95
- 0xf0edabbb9ba0d643e5505d19d07637eb6f6aed0a1c7356af43ae7d84ae9ef0c5
- 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
- 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
- 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
- 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
- 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
- Day root
- 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
- Chained
- 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
- Published
- On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae