mcp server

crossref-mcp-server

Resolve DOIs, search ~155M scholarly works, and fetch references via the Crossref REST API.

Description as published by the maintainer. Source

version 0.2.0
active
retrieval

active — Most recent push to the repository was 2026-07-13. Dashed tags are derived by ZBS Index from the published description, not stated by the maintainer.

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
GitHub stars	2	Number of GitHub accounts that bookmarked this repository since it was created. It is a bookmark count, not installs, not active users and not quality.	cumulative, all time	2026-08-06	GitHub
Last commit	2026-07-13	Date of the most recent push to any branch. This is the strongest cheap indicator of whether the project is still maintained.	point in time	2026-08-06	GitHub
Open issues	9	Open issues plus open pull requests, as GitHub counts them together. A high number can mean an active project or an abandoned one.	as of fetch	2026-08-06	GitHub
Latest published version	0.2.0	Latest version string the maintainer published to the registry.	as of fetch	2026-07-13	Model Context Protocol
Registry record last updated	2026-07-13	When the registry record was last updated by its maintainer.	point in time	2026-07-13	Model Context Protocol
First listed in the MCP Registry	2026-07-13	Date this server was first published to the official MCP Registry. Not a usage or quality measure.	point in time	2026-07-13	Model Context Protocol
repository status	active	The repository exists on GitHub and is not archived. This says nothing about how recently it was worked on.	as of fetch	2026-08-06	GitHub

Where to get it

Related, by what their authors tagged them

Citation Verification — last commit 2026-06-11, shares citation, crossref
Real-time fact-check, citation verification, and source-freshness for AI agents.
io.github.cyanheads/openalex-mcp-server — last commit 2026-07-27, shares academic-search, bibliometrics, cyanheads
Access the OpenAlex academic research catalog — 270M+ publications.
io.github.cyanheads/biorxiv-mcp-server — last commit 2026-07-11, shares bun, cyanheads, doi
Search and retrieve bioRxiv and medRxiv preprints — by DOI, date interval, or keyword — via MCP.
Academic Research Intelligence MCP — last commit 2026-07-16, shares academic-search, research
Academic paper search, scientific literature, citation analysis, arXiv & semantic related-work.
SearchForge — last commit 2026-07-25, shares academic-search
Free open-source web search and page reading for LLMs, AI agents, and RAG.
io.github.cyanheads/arxiv-mcp-server — last commit 2026-07-27, shares cyanheads, research
Search arXiv, fetch paper metadata, and read full-text content.
Fodda Brand Intelligence — last commit 2026-08-06, shares research
Brand health & trend footprint across PSFK expert graphs with citable sources, not web summaries.
Fodda Deep Research — last commit 2026-08-06, shares research
Autonomous deep research reports merging PSFK trend graphs with citable sources.
Fodda Earnings Intelligence — last commit 2026-08-06, shares research
Cross-company earnings trends & executive divergence with citable sources.
Fodda Synthetic Expert Consult — last commit 2026-08-06, shares research
Consult synthetic industry experts grounded in PSFK trend graphs with citable sources.

These share tags the maintainers applied themselves, such as citation, crossref, academic-search, bibliometrics. Common tags like "mcp" or "ai" are ignored for this: agreeing with six hundred other projects is not a similarity.

This is not a recommendation and not a test result. It is a map of what the authors said their work is about.

Also from cyanheads

io.github.cyanheads/anime-mcp-server — last commit 2026-07-30
Search anime/manga, franchise watch order, schedule, characters, rankings, studio filmography.
io.github.cyanheads/astronomy-mcp-server — last commit 2026-07-31
Offline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.
io.github.cyanheads/attack-surface-mcp-server — last commit 2026-07-30
Passive external attack-surface mapping: CT subdomains, DNS, TLS, HTTP posture, RDAP/WHOIS, Shodan.
io.github.cyanheads/aviation-weather-mcp-server — last commit 2026-07-30
Fetch METARs, TAFs, PIREPs, and SIGMETs/AIRMETs from the NWS Aviation Weather Center.
io.github.cyanheads/bls-labor-mcp-server — last commit 2026-07-17
Fetch US Bureau of Labor Statistics data — CPI, unemployment, wages, JOLTS, and more via MCP.
io.github.cyanheads/bls-mcp-server — last commit 2026-07-17
Fetch US Bureau of Labor Statistics data — CPI, unemployment, wages, JOLTS, and more via MCP.
io.github.cyanheads/bluesky-mcp-server — last commit 2026-07-31
Search posts, profiles, feeds, threads, and trending topics on Bluesky.
io.github.cyanheads/brapi-mcp-server — last commit 2026-07-16
Collaborative BrAPI v2.1 MCP workspace — studies, germplasm, genotypes across Breedbase, T3, more.
io.github.cyanheads/calculator-mcp-server — last commit 2026-07-02
Evaluate, simplify, and differentiate mathematical expressions.
io.github.cyanheads/cdc-health-mcp-server — last commit 2026-07-11
Search and query CDC public health data — mortality, vaccinations, surveillance, behavioral risk.

How the author describes it

Topics the maintainer set on GitHub: academic-search, ai-agent, bibliometrics, bun, citation, crossref, cyanheads, doi, mcp, mcp-server, model-context-protocol, research, scholarly-metadata, typescript.

This record as data

Every field on this page, with its source and observation date, is in the catalog JSON. Fetch the whole kind at once instead of parsing this HTML.

GET /api/v1/entries/mcp_server.json