SiteCheck

Name: SiteCheck
Price: 0.002 USDC
Availability: InStock

Searches OpenAlex (CC0) for scholarly works: title, authors with institutions, year, venue, DOI, open-access PDF link, citation count, topic and abstract (max 2,000 characters). Filters: publication year range, open access only, minimum citations; sort by relevance, citations or date (citations and date search the words as one phrase). Limit max 25.

SearchLiveeip155:8453Exactvia cdp

https://api.sitecheck-api.workers.dev/api/research/papers

ResearchPapersOpenalexCitations

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 snapshots so far.

$7.88

Verified settled volume

2,993 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0020

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-10-16 07:43Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xb8491F953e6860D3b5840b73c60883Ff099ceAfA

The 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.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.002USDC≈ $0.002 USD

on Base · exact scheme

Pay 0.002 USDC on Base to 0xb849…ceAfA. The signed payment is good for 5 minutes.

Paid to: 0xb849…ceAfA
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 2000 smallest units

2000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: J8vnmB…BRdhR
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

2000units

on eip155:5042 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xa475…39be3
Token contract: 0x3600…00000
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb8491F953e6860D3b5840b73c60883Ff099ceAfA",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "J8vnmBx4pS1X7UUBTfz1yWBKiw69Dj2yRGRHDaXBRdhR",
    "amount": "2000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3600000000000000000000000000000000000000",
    "extra": {
      "name": "USDC",
      "version": "2"
    },
    "payTo": "0xa4751fCAa83c9669cfe507bb6807507729839be3",
    "amount": "2000",
    "scheme": "exact",
    "network": "eip155:5042",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "q": "retrieval augmented generation",
          "sort": "citations",
          "limit": "2"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "sort": "citations",
          "count": 2,
          "query": "retrieval augmented generation",
          "total": 57526,
          "source": "OpenAlex works (openalex.org, CC0 data; API terms at docs.openalex.org)",
          "results": [
            {
              "id": "https://openalex.org/W3015883388",
              "doi": "https://doi.org/10.18653/v1/2020.emnlp-main.550",
              "year": 2020,
              "title": "Dense Passage Retrieval for Open-Domain Question Answering",
              "topic": "Topic Modeling",
              "venue": "Conference on Empirical Methods in Natural Language Processing (EMNLP)",
              "authors": [
                {
                  "name": "Vladimir Karpukhin",
                  "institutions": [
                    "Meta (Israel)"
                  ]
                },
                {
                  "name": "Barlas Oğuz",
                  "institutions": [
                    "Meta (Israel)"
                  ]
                },
                {
                  "name": "Sewon Min",
                  "institutions": [
                    "University of Washington"
                  ]
                }
              ],
              "abstract": "Vladimir Karpukhin, Barlas Oguz, Sewon Min, Patrick Lewis, Ledell Wu, Sergey Edunov, Danqi Chen, Wen-tau Yih. Proceedings of the 2020 Conference on Empirical Methods in Natural Language Processing (EMNLP). 2020.",
              "citations": 3397,
              "openAccessPdf": "https://www.aclweb.org/anthology/2020.emnlp-main.550.pdf"
            },
            {
              "id": "https://openalex.org/W3027879771",
              "doi": "https://doi.org/10.48550/arxiv.2005.11401",
              "year": 2020,
              "title": "Affordance-Compiled Intelligence: Observable-Only Cognitive Impedance Matching for No-Meta LLM-Integrated Systems",
              "topic": "Safety Systems Engineering in Autonomy",
              "venue": "arXiv (Cornell University)",
              "authors": [
                {
                  "name": "Patrick Lewis",
                  "institutions": []
                },
                {
                  "name": "Ethan Perez",
                  "institutions": []
                },
                {
                  "name": "Aleksandra Piktus",
                  "institutions": []
                }
              ],
              "abstract": "Affordance-Compiled Intelligence develops Cognitive Impedance Matching Theory (CIMT), an observable-only and no-meta protected compiler theory for LLM-integrated systems. The paper studies how a fixed model-policy can exhibit different operational capability when the surrounding world is redesigned through observations, typed action handles, validators, repair paths, rollback modes, authority scopes, context summaries, and auditable receipts. CIMT treats system-level capability amplification as a world-side compilation problem rather than a model-weight improvement problem. It defines operatio…",
              "citations": 3027,
              "openAccessPdf": "https://arxiv.org/pdf/2005.11401"
            }
          ],
          "checkedAt": "2026-10-15T19:01:48.972Z"
        }
      }
    },
    "schema": {
      "type": "object",
      "$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",
              "required": [
                "q"
              ],
              "properties": {
                "q": {
                  "type": "string",
                  "description": "Search words (1-200 characters)"
                },
                "sort": {
                  "type": "string",
                  "description": "relevance (default), citations or date"
                },
                "limit": {
                  "type": "string",
                  "description": "Results, 1-25 (default 10)"
                },
                "toYear": {
                  "type": "string",
                  "description": "Latest publication year (optional)"
                },
                "fromYear": {
                  "type": "string",
                  "description": "Earliest publication year (optional)"
                },
                "openAccess": {
                  "type": "string",
                  "description": "Only open-access works (default false)"
                },
                "minCitations": {
                  "type": "string",
                  "description": "Minimum citation count (default 0)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-10-16 07:43Z
Last indexed by Roundhouse: 2026-10-26 15:00Z
Last enriched (probe, favicon, geo): 2026-10-15 20:45Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

Report

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. 15 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service SiteCheck 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=SiteCheck'
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.sitecheck-api.workers.dev/api/research/papers, 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.