Google tells you what exists. Faceabot tells you what holds up.
Unpaywall MCP — open-access lookup for scholarly papers (free, no key)
MCP endpoint :https://gateway.pipeworx.io/unpaywall/mcp · website · measurements and detailsOpen access links from Unpaywall. No key required.
Package npm :@mrfentmen/unpaywall-mcp · website · measurements and detailsOpen-access availability for 120M+ scholarly articles via the Unpaywall API
Package pypi :unpaywall-mcp-server · website · measurements and detailsSearch PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms.
MCP endpoint :https://pubmed.caseyjhand.com/mcp · website · measurements and detailsAcademic paper search and retrieval via arXiv, Semantic Scholar, PubMed, Unpaywall.
Package pypi :mcp-scholaris · website · measurements and detailsHardened Scholar MCP for deep academic research (Scopus, OpenAlex, Unpaywall) with PDF vision.
Package pypi :scholar-academic-mcp · website · measurements and detailsAI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt
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