Research papers
REMOTE · FOURZEROTWO.SI
arXiv, PubMed, Crossref and OpenAlex scholarly metadata.
Available components
Last scanned (5 hours ago)
Scores higher than 82% of remote servers
Reachable. Last reached 25 Oct 2026.
Category Education and Research
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability70
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 2307 tokens (~60/item across 38 items; 38 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management43
- Stability observed for 13 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 38 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 39 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 25 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.
- 23 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.
- 21 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.
- 19 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 14 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 12 Oct 26 73
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 25 Oct 2026 · Probed https://fourzerotwo.si/mcp/v/research
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=fourzerotwo.si | CN=WE1,O=Google Trust Services,C=US | 10 Oct 2026 | 8 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 7083f50b7ee269bb0ef93ba441295bdf |
| SANs: fourzerotwo.si | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of fourzerotwo.si. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| si. | present | 42378 | 13 | Verified |
| fourzerotwo.si. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| x-content-type-options | nosniff |
| x-frame-options | deny |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://fourzerotwo.si/mcp/v/research | Verified | 200 | |
| http (plaintext) | http://fourzerotwo.si/mcp/v/research | HTTPS enforced | 301 | https://fourzerotwo.si/mcp/v/research |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
arxiv__paper arXiv Papers: Paper by id ~77
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.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | arXiv id(s), comma-separated (e.g. 1706.03762) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent arXiv Papers: Newest in a category ~63
The newest submissions in any arXiv category. Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | yes | Category, e.g. math.PR |
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-astro-ph arXiv Papers: Newest in Astrophysics ~56
The newest arXiv submissions in astro-ph (Astrophysics). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-cs-ai arXiv Papers: Newest in Artificial Intelligence ~56
The newest arXiv submissions in cs.AI (Artificial Intelligence). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-cs-cl arXiv Papers: Newest in Computation and Language (NLP) ~60
The newest arXiv submissions in cs.CL (Computation and Language (NLP)). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-cs-cr arXiv Papers: Newest in Cryptography and Security ~57
The newest arXiv submissions in cs.CR (Cryptography and Security). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-cs-cv arXiv Papers: Newest in Computer Vision ~57
The newest arXiv submissions in cs.CV (Computer Vision). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-cs-lg arXiv Papers: Newest in Machine Learning ~56
The newest arXiv submissions in cs.LG (Machine Learning). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-cs-ro arXiv Papers: Newest in Robotics ~55
The newest arXiv submissions in cs.RO (Robotics). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-econ arXiv Papers: Newest in Economics ~53
The newest arXiv submissions in econ (Economics). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-q-bio arXiv Papers: Newest in Quantitative Biology ~57
The newest arXiv submissions in q-bio (Quantitative Biology). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-q-fin arXiv Papers: Newest in Quantitative Finance ~55
The newest arXiv submissions in q-fin (Quantitative Finance). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-quant-ph arXiv Papers: Newest in Quantum Physics ~55
The newest arXiv submissions in quant-ph (Quantum Physics). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__recent-stat-ml arXiv Papers: Newest in Statistics: Machine Learning ~58
The newest arXiv submissions in stat.ML (Statistics: Machine Learning). Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Results, max 50 (default 25) |
Structured output declared, but exposes no named fields.
No examples provided.
arxiv__search arXiv Papers: Search papers ~129
Search arXiv by keywords, title, author and/or category; sort by relevance or newest. Costs $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| author | string | – | Author name |
| category | string | – | Category, e.g. cs.CL |
| limit | integer | – | Results, max 50 (default 20) |
| q | string | – | Keywords (all must match) |
| sort | string | – | relevance (default), submitted or updated |
| start | integer | – | Offset for paging |
| title | string | – | Phrase in the title |
Structured output declared, but exposes no named fields.
No examples provided.
crossref__doi Crossref DOI Metadata: DOI lookup ~53
Title, authors, journal, dates, references count and licence for a DOI. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| doi | string | yes | DOI |
Structured output declared, but exposes no named fields.
No examples provided.
crossref__funders Crossref DOI Metadata: Search funders ~51
Research funders by name, with Funder Registry ids. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| q | string | yes | Funder |
Structured output declared, but exposes no named fields.
No examples provided.
crossref__journal Crossref DOI Metadata: Journal by ISSN ~50
Journal title, publisher and DOI counts by ISSN. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| issn | string | yes | ISSN |
Structured output declared, but exposes no named fields.
No examples provided.
crossref__members Crossref DOI Metadata: Search publishers ~44
Crossref member publishers by name. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| q | string | yes | Publisher |
Structured output declared, but exposes no named fields.
No examples provided.
crossref__search Crossref DOI Metadata: Search works ~45
Bibliographic search across Crossref works. Free within the daily allowance, then $0.003 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| q | string | yes | Query |
Structured output declared, but exposes no named fields.
No examples provided.
pubmed__clinical-trials-search PubMed: Search clinical trial records ~58
PubMed citations that are clinical trial reports for a query. A few free samples a day, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| term | string | yes | Query with [pt] filter |
Structured output declared, but exposes no named fields.
No examples provided.
pubmed__pmc-search PubMed: Search PubMed Central ~50
Free full-text article ids in PubMed Central. A few free samples a day, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| term | string | yes | Query |
Structured output declared, but exposes no named fields.
No examples provided.
pubmed__search PubMed: Search PubMed ~51
PubMed ids matching a query (supports PubMed query syntax). A few free samples a day, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| term | string | yes | Query |
Structured output declared, but exposes no named fields.
No examples provided.
pubmed__summary PubMed: Article summaries ~58
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.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | PMIDs, comma separated |
Structured output declared, but exposes no named fields.
No examples provided.
ror__affiliation Research Organisations (ROR): Match an affiliation string ~66
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.
| Name | Type | Req | Description |
|---|---|---|---|
| affiliation | string | yes | Affiliation text |
Structured output declared, but exposes no named fields.
No examples provided.
ror__external-id Research Organisations (ROR): Lookup by external id ~74
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.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | GRID, ISNI, Wikidata QID or Crossref Funder ID |
Structured output declared, but exposes no named fields.
No examples provided.
ror__organisation Research Organisations (ROR): Organisation by ROR id ~82
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.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | ROR id, e.g. 052gg0110 or https://ror.org/052gg0110 |
Structured output declared, but exposes no named fields.
No examples provided.
ror__relationships Research Organisations (ROR): Parents & children ~70
Parent, child and related organisations of a ROR record. Free within the daily allowance, then $0.001 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | ROR id, e.g. 052gg0110 or https://ror.org/052gg0110 |
Structured output declared, but exposes no named fields.
No examples provided.
ror__search Research Organisations (ROR): Search organisations ~95
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.
| Name | Type | Req | Description |
|---|---|---|---|
| country | string | – | 2-letter country code |
| q | string | yes | Name, acronym or keyword |
| type | string | – | education, funder, healthcare, company, archive, nonprofit, government, facility, other |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__author Scholarly Works (OpenAlex): Author ~52
One researcher by OpenAlex id or ORCID. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | OpenAlex id or orcid:… |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__authors-search Scholarly Works (OpenAlex): Search authors ~50
Researchers by name with h-index, works and citation counts. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| search | string | yes | Author name |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__autocomplete Scholarly Works (OpenAlex): Autocomplete works ~43
Fast title autocomplete across works. Free within the daily allowance, then $0.001 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| q | string | yes | Partial title |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__citing-works Scholarly Works (OpenAlex): Papers citing a paper ~60
Works that cite a given OpenAlex work id. Free within the daily allowance, then $0.003 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| work | string | yes | Filter, e.g. cites:W2919115771 |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__institutions-search Scholarly Works (OpenAlex): Search institutions ~46
Universities and research institutions with output stats. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| search | string | yes | Institution |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__sources-search Scholarly Works (OpenAlex): Search journals ~45
Journals and repositories with impact stats. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| search | string | yes | Journal |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__topics-search Scholarly Works (OpenAlex): Search topics ~42
Research topics and fields. Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| search | string | yes | Topic |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__work Scholarly Works (OpenAlex): Paper by id or DOI ~57
One work by OpenAlex id (W…) or "doi:10.…". Free within the daily allowance, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| id | string | yes | OpenAlex id or doi:… |
Structured output declared, but exposes no named fields.
No examples provided.
scholarly__works-search Scholarly Works (OpenAlex): Search papers ~53
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.
| Name | Type | Req | Description |
|---|---|---|---|
| search | string | yes | Query |
Structured output declared, but exposes no named fields.
No examples provided.
How do I install the Research papers MCP server?
Research papers is a hosted endpoint at https://fourzerotwo.si/mcp/v/research, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · fourzerotwo.si
claude mcp add --transport http si-fourzerotwo-research 'https://fourzerotwo.si/mcp/v/research'
What is the Research papers MCP server?
Research papers is an MCP server listed in the public MCP registry as si.fourzerotwo/research. arXiv, PubMed, Crossref and OpenAlex scholarly metadata. This page covers its hosted endpoint (https://fourzerotwo.si/mcp/v/research).
Is the Research papers MCP server safe to use?
Research papers scores 79 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Research papers MCP server expose?
Research papers exposes 38 tools: crossref__doi, crossref__search, crossref__journal, crossref__funders, crossref__members, and 33 more. Their descriptions and schemas cost roughly 2,239 tokens of context every time the server is loaded.
Does the Research papers MCP server require authentication?
No. We connected to Research papers without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Research papers MCP server still maintained?
Research papers is still listed as active in the MCP registry. We last reached this channel on 25 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.