FastAF
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.
SearchLiveeip155:8453Exactvia cdp
DataScrapingWeb-dataApiAgents
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$0.38
Verified settled volume
65 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-26 01:24Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x05B75e13f071A09A26B50a18Ce5BD02a0755d76FThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"docs": "https://fastaf.co/docs/#x402",
"error": "payment_required",
"price": {
"usd": "0.005000",
"asset": "USDC",
"credits": 5,
"network": "eip155:8453"
},
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x05B75e13f071A09A26B50a18Ce5BD02a0755d76F",
"amount": "5000",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://api.fastaf.co/x402/v1/scholar",
"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.",
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.fastaf.co/x402/v1/scholar",
"tags": [
"data",
"scraping",
"web-data",
"api",
"agents"
],
"docsUrl": "https://fastaf.co/apis/google-scholar-api/",
"iconUrl": "https://fastaf.co/favicon.ico",
"website": "https://fastaf.co",
"homepage": "https://fastaf.co",
"mimeType": "application/json",
"openApiUrl": "https://api.fastaf.co/openapi.json",
"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: $0.005000 USDC per successful call.",
"serviceName": "FastAF"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"query": "retrieval augmented generation",
"as_yhi": "2026",
"as_ylo": "2020",
"language": "en"
}
},
"output": {
"type": "json",
"example": {
"scholar_results": [
{
"title": "Retrieval-Augmented Generation for Knowledge-Intensive NLP Tasks",
"snippet": "A retrieval-augmented model combines a language model with a searchable document index.",
"title_link": "https://arxiv.org/abs/2005.11401",
"inline_links": {
"cited_by": {
"total": "Cited by 120",
"cites_id": "1234567890123456789"
}
},
"displayed_link": "P Lewis et al. - NeurIPS, 2020"
}
]
}
},
"docsUrl": "https://fastaf.co/apis/google-scholar-api/",
"website": "https://fastaf.co",
"homepage": "https://fastaf.co",
"openApiUrl": "https://api.fastaf.co/openapi.json"
},
"schema": {
"type": "object",
"title": "FastAF Google Scholar Search",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"query"
]
},
{
"required": [
"cites"
]
},
{
"required": [
"cluster"
]
}
],
"examples": [
{
"query": "retrieval augmented generation",
"as_yhi": "2026",
"as_ylo": "2020",
"language": "en"
}
],
"properties": {
"lr": {
"type": "string",
"maxLength": 8192,
"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."
},
"html": {
"type": "boolean",
"description": "Return raw source HTML instead of parsed JSON when true; true/false, default false. No option surcharge; 5 credits per successful request."
},
"page": {
"type": "integer",
"minimum": 0,
"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."
},
"safe": {
"type": "string",
"maxLength": 8192,
"description": "Adult-content filter: active enables SafeSearch; off disables it (default off). No option surcharge; 5 credits per successful request."
},
"as_rr": {
"type": "string",
"maxLength": 8192,
"description": "Review-paper filter: string 1 returns review articles only, 0 all article types (default 0). No option surcharge; 5 credits per successful request."
},
"cites": {
"type": "string",
"maxLength": 8192,
"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."
},
"query": {
"type": "string",
"examples": [
"retrieval augmented generation"
],
"maxLength": 8192,
"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."
},
"as_sdt": {
"type": "string",
"maxLength": 8192,
"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."
},
"as_vis": {
"type": "string",
"maxLength": 8192,
"description": "Citation-only results: string 1 excludes them, 0 includes them (default 0). No option surcharge; 5 credits per successful request."
},
"as_yhi": {
"type": "string",
"examples": [
"2026"
],
"maxLength": 8192,
"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."
},
"as_ylo": {
"type": "string",
"examples": [
"2020"
],
"maxLength": 8192,
"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."
},
"filter": {
"type": "string",
"maxLength": 8192,
"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."
},
"scisbd": {
"type": "string",
"maxLength": 8192,
"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."
},
"cluster": {
"type": "string",
"maxLength": 8192,
"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."
},
"results": {
"type": "integer",
"minimum": 1,
"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."
},
"language": {
"type": "string",
"examples": [
"en"
],
"maxLength": 8192,
"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."
}
},
"description": "Academic topic search with language and publication-year filters; citation or cluster IDs can replace query.",
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"scholar_results": {
"type": "array",
"items": {
"type": "object",
"properties": {
"title": {
"type": "string"
},
"snippet": {
"type": "string"
},
"title_link": {
"type": "string"
},
"inline_links": {
"type": "object",
"properties": {
"cited_by": {
"type": "object",
"properties": {
"total": {
"type": "string"
},
"cites_id": {
"type": "string"
}
},
"additionalProperties": true
}
},
"additionalProperties": true
},
"displayed_link": {
"type": "string"
}
},
"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.",
"additionalProperties": true
}
}
},
"docsUrl": {
"type": "string",
"format": "uri"
},
"website": {
"type": "string",
"format": "uri"
},
"homepage": {
"type": "string",
"format": "uri"
},
"openApiUrl": {
"type": "string",
"format": "uri"
}
},
"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."
},
"metadata": {
"provider": {
"name": "FastAF",
"docsUrl": "https://fastaf.co/apis/google-scholar-api/",
"website": "https://fastaf.co",
"homepage": "https://fastaf.co",
"openApiUrl": "https://api.fastaf.co/openapi.json",
"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."
}
},
"routeTemplate": "/x402/v1/scholar"
}
},
"how_to_pay": "Use the PAYMENT-REQUIRED header with an x402 v2 client (PAYMENT-SIGNATURE), or the JSON body with an x402 v1 client (X-PAYMENT). Settled only if the request succeeds.",
"with_a_key": "Or create a free account at https://fastaf.co/signup: 2 free calls after you verify your email, then prepaid credits.",
"x402Version": 1,
"error_details": {
"code": "payment_required",
"message": "Payment is required for this request."
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x05B7…5d76F. The signed payment is good for 5 minutes.
- Paid to
- 0x05B7…5d76F
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x05B75e13f071A09A26B50a18Ce5BD02a0755d76F",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"query": "retrieval augmented generation",
"as_yhi": "2026",
"as_ylo": "2020",
"language": "en"
}
},
"output": {
"type": "json",
"example": {
"scholar_results": [
{
"title": "Retrieval-Augmented Generation for Knowledge-Intensive NLP Tasks",
"snippet": "A retrieval-augmented model combines a language model with a searchable document index.",
"title_link": "https://arxiv.org/abs/2005.11401",
"inline_links": {
"cited_by": {
"total": "Cited by 120",
"cites_id": "1234567890123456789"
}
},
"displayed_link": "P Lewis et al. - NeurIPS, 2020"
}
]
}
},
"docsUrl": "https://fastaf.co/apis/google-scholar-api/",
"website": "https://fastaf.co",
"homepage": "https://fastaf.co",
"openApiUrl": "https://api.fastaf.co/openapi.json"
},
"schema": {
"type": "object",
"title": "FastAF Google Scholar Search",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"anyOf": [
{
"required": [
"query"
]
},
{
"required": [
"cites"
]
},
{
"required": [
"cluster"
]
}
],
"examples": [
{
"query": "retrieval augmented generation",
"as_yhi": "2026",
"as_ylo": "2020",
"language": "en"
}
],
"properties": {
"lr": {
"type": "string",
"maxLength": 8192,
"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."
},
"html": {
"type": "boolean",
"description": "Return raw source HTML instead of parsed JSON when true; true/false, default false. No option surcharge; 5 credits per successful request."
},
"page": {
"type": "integer",
"minimum": 0,
"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."
},
"safe": {
"type": "string",
"maxLength": 8192,
"description": "Adult-content filter: active enables SafeSearch; off disables it (default off). No option surcharge; 5 credits per successful request."
},
"as_rr": {
"type": "string",
"maxLength": 8192,
"description": "Review-paper filter: string 1 returns review articles only, 0 all article types (default 0). No option surcharge; 5 credits per successful request."
},
"cites": {
"type": "string",
"maxLength": 8192,
"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."
},
"query": {
"type": "string",
"examples": [
"retrieval augmented generation"
],
"maxLength": 8192,
"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."
},
"as_sdt": {
"type": "string",
"maxLength": 8192,
"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."
},
"as_vis": {
"type": "string",
"maxLength": 8192,
"description": "Citation-only results: string 1 excludes them, 0 includes them (default 0). No option surcharge; 5 credits per successful request."
},
"as_yhi": {
"type": "string",
"examples": [
"2026"
],
"maxLength": 8192,
"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."
},
"as_ylo": {
"type": "string",
"examples": [
"2020"
],
"maxLength": 8192,
"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."
},
"filter": {
"type": "string",
"maxLength": 8192,
"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."
},
"scisbd": {
"type": "string",
"maxLength": 8192,
"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."
},
"cluster": {
"type": "string",
"maxLength": 8192,
"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."
},
"results": {
"type": "integer",
"minimum": 1,
"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."
},
"language": {
"type": "string",
"examples": [
"en"
],
"maxLength": 8192,
"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."
}
},
"description": "Academic topic search with language and publication-year filters; citation or cluster IDs can replace query.",
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"scholar_results": {
"type": "array",
"items": {
"type": "object",
"properties": {
"title": {
"type": "string"
},
"snippet": {
"type": "string"
},
"title_link": {
"type": "string"
},
"inline_links": {
"type": "object",
"properties": {
"cited_by": {
"type": "object",
"properties": {
"total": {
"type": "string"
},
"cites_id": {
"type": "string"
}
},
"additionalProperties": true
}
},
"additionalProperties": true
},
"displayed_link": {
"type": "string"
}
},
"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.",
"additionalProperties": true
}
}
},
"docsUrl": {
"type": "string",
"format": "uri"
},
"website": {
"type": "string",
"format": "uri"
},
"homepage": {
"type": "string",
"format": "uri"
},
"openApiUrl": {
"type": "string",
"format": "uri"
}
},
"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."
},
"metadata": {
"provider": {
"name": "FastAF",
"docsUrl": "https://fastaf.co/apis/google-scholar-api/",
"website": "https://fastaf.co",
"homepage": "https://fastaf.co",
"openApiUrl": "https://api.fastaf.co/openapi.json",
"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."
}
},
"routeTemplate": "/x402/v1/scholar"
}
}Provenance
- Seen in the source catalog
- 2026-10-26 01:24Z
- Last indexed by Roundhouse
- 2026-10-26 17:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-26 12:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service FastAF and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=FastAF' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.fastaf.co/x402/v1/scholar, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.