mcp server
io.github.SMABoundless/unpaywall
Open-access availability for 120M+ scholarly articles via the Unpaywall API
Description as published by the maintainer. Source
- version 1.0.1
- active
active — Registry entry last updated 2026-07-04.
Signals
These are separate measurements of different things. They are deliberately not combined into one score, because a popularity number that mixes website traffic with saves and stars cannot be checked or acted on.
| Signal | Value | What it measures | Window | Observed | Source |
|---|---|---|---|---|---|
| Latest published version | 1.0.1 | Latest version string the maintainer published to the registry. | as of fetch | Model Context Protocol | |
| Registry record last updated | 2026-07-04 | When the registry record was last updated by its maintainer. | point in time | Model Context Protocol | |
| First listed in the MCP Registry | 2026-07-04 | Date this server was first published to the official MCP Registry. Not a usage or quality measure. | point in time | Model Context Protocol |
Where to get it
Also from smaboundless
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io.github.SMABoundless/crossref
Search and retrieve scholarly metadata from the Crossref REST API
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io.github.SMABoundless/orcid
Search ORCID researcher profiles, retrieve works, and export citations
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io.github.SMABoundless/scopus
Search Scopus abstracts, authors, and export citations via Elsevier API
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io.github.SMABoundless/semanticscholar
Search 200M+ papers, authors, citations, and recommendations via Semantic Scholar
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