Research papers

si.fourzerotwo/research · v1.0.1

arXiv, PubMed, Crossref and OpenAlex scholarly metadata.

Website Set it up

Connect Remote server

Terminal

claude mcp add --transport http research https://fourzerotwo.si/mcp/v/research --header "X-API-Key: <X_API_KEY>"

~/.cursor/mcp.json

{
  "mcpServers": {
    "research": {
      "url": "https://fourzerotwo.si/mcp/v/research",
      "headers": {
        "X-API-Key": "<X_API_KEY>"
      }
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "research": {
      "type": "http",
      "url": "https://fourzerotwo.si/mcp/v/research",
      "headers": {
        "X-API-Key": "<X_API_KEY>"
      }
    }
  }
}

Claude Desktop

Settings > Connectors > Add custom connector
URL: https://fourzerotwo.si/mcp/v/research

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 38 found in our last check

crossref__doi
Title, authors, journal, dates, references count and licence for a DOI. Free within the daily allowance, then $0.002 USDC per call via x402.
crossref__search
Bibliographic search across Crossref works. Free within the daily allowance, then $0.003 USDC per call via x402.
crossref__journal
Journal title, publisher and DOI counts by ISSN. Free within the daily allowance, then $0.002 USDC per call via x402.
crossref__funders
Research funders by name, with Funder Registry ids. Free within the daily allowance, then $0.002 USDC per call via x402.
crossref__members
Crossref member publishers by name. Free within the daily allowance, then $0.002 USDC per call via x402.
pubmed__search
PubMed ids matching a query (supports PubMed query syntax). A few free samples a day, then $0.002 USDC per call via x402.
pubmed__summary
Title, authors, journal, date and DOI for comma-separated PubMed ids. A few free samples a day, then $0.002 USDC per call via x402.
pubmed__pmc-search
Free full-text article ids in PubMed Central. A few free samples a day, then $0.002 USDC per call via x402.
pubmed__clinical-trials-search
PubMed citations that are clinical trial reports for a query. A few free samples a day, then $0.002 USDC per call via x402.
ror__search
Find research organisations by name, acronym or keyword, optionally filtered by country and type. Free within the daily allowance, then $0.001 USDC per call via x402.
ror__organisation
Full record: names and aliases, types, status, founding year, location, website, domains, external ids. Free within the daily allowance, then $0.0005 USDC per call via x402.
ror__affiliation
Turn a free-text affiliation (as printed on a paper) into the matching organisation, with ROR's confidence flag and candidates. Free within the daily allowance, then $0.001 USDC per call via x402.
ror__external-id
Find the organisation for a GRID id, ISNI, Wikidata QID or Crossref Funder ID. Free within the daily allowance, then $0.001 USDC per call via x402.
ror__relationships
Parent, child and related organisations of a ROR record. Free within the daily allowance, then $0.001 USDC per call via x402.
scholarly__works-search
Full-text search of scholarly works, with citations, authors and open-access links. Free within the daily allowance, then $0.003 USDC per call via x402.
scholarly__work
One work by OpenAlex id (W…) or "doi:10.…". Free within the daily allowance, then $0.002 USDC per call via x402.
scholarly__authors-search
Researchers by name with h-index, works and citation counts. Free within the daily allowance, then $0.002 USDC per call via x402.
scholarly__author
One researcher by OpenAlex id or ORCID. Free within the daily allowance, then $0.002 USDC per call via x402.
scholarly__institutions-search
Universities and research institutions with output stats. Free within the daily allowance, then $0.002 USDC per call via x402.
scholarly__sources-search
Journals and repositories with impact stats. Free within the daily allowance, then $0.002 USDC per call via x402.
scholarly__topics-search
Research topics and fields. Free within the daily allowance, then $0.002 USDC per call via x402.
scholarly__autocomplete
Fast title autocomplete across works. Free within the daily allowance, then $0.001 USDC per call via x402.
scholarly__citing-works
Works that cite a given OpenAlex work id. Free within the daily allowance, then $0.003 USDC per call via x402.
arxiv__search
Search arXiv by keywords, title, author and/or category; sort by relevance or newest. Costs $0.002 USDC per call via x402.
arxiv__paper
Full metadata for up to 20 arXiv ids: title, authors, abstract, categories, dates, DOI, journal ref, links. Costs $0.001 USDC per call via x402.
arxiv__recent
The newest submissions in any arXiv category. Costs $0.002 USDC per call via x402.
arxiv__recent-cs-ai
The newest arXiv submissions in cs.AI (Artificial Intelligence). Costs $0.002 USDC per call via x402.
arxiv__recent-cs-lg
The newest arXiv submissions in cs.LG (Machine Learning). Costs $0.002 USDC per call via x402.
arxiv__recent-cs-cl
The newest arXiv submissions in cs.CL (Computation and Language (NLP)). Costs $0.002 USDC per call via x402.
arxiv__recent-cs-cv
The newest arXiv submissions in cs.CV (Computer Vision). Costs $0.002 USDC per call via x402.
arxiv__recent-cs-cr
The newest arXiv submissions in cs.CR (Cryptography and Security). Costs $0.002 USDC per call via x402.
arxiv__recent-cs-ro
The newest arXiv submissions in cs.RO (Robotics). Costs $0.002 USDC per call via x402.
arxiv__recent-stat-ml
The newest arXiv submissions in stat.ML (Statistics: Machine Learning). Costs $0.002 USDC per call via x402.
arxiv__recent-quant-ph
The newest arXiv submissions in quant-ph (Quantum Physics). Costs $0.002 USDC per call via x402.
arxiv__recent-astro-ph
The newest arXiv submissions in astro-ph (Astrophysics). Costs $0.002 USDC per call via x402.
arxiv__recent-q-fin
The newest arXiv submissions in q-fin (Quantitative Finance). Costs $0.002 USDC per call via x402.
arxiv__recent-econ
The newest arXiv submissions in econ (Economics). Costs $0.002 USDC per call via x402.
arxiv__recent-q-bio
The newest arXiv submissions in q-bio (Quantitative Biology). Costs $0.002 USDC per call via x402.

Headers

Name	Description
`X-API-Key` Optional, secret	Optional free key from https://fourzerotwo.si/free (raises the free allowance from 100 to 500 calls/day)

Details

Endpoint	`https://fourzerotwo.si/mcp/v/research` (Streamable HTTP)
First published	11 Oct 2026
Last updated	11 Oct 2026
Registry name	`si.fourzerotwo/research`

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Live status

Live

Typical response: 633 ms
Answered: 100% of 2 checks
Last check: 13 Nov 2026

30 days agoToday

We connect daily without credentials and run initialize and tools/list.

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