Code-only MCP servers — agent-tools.cloud

MCP servers that ship as code — a repository or a package you install and run locally (usually over stdio). They have no hosted endpoint, so we cannot probe or grade them: instead each one shows its repository, install command, license, stars and when it was last updated.

Collected from GitHub repositories and npm, PyPI, Cargo, Go, Maven, NuGet and RubyGems packages tagged as MCP servers, the official MCP Registry, Docker's MCP catalog, ModelScope, Baidu MCP World, Cline and other public directories; one entry per repository. A server that also offers a hosted endpoint is listed under Remote instead. These entries are not counted in our reachability, verification or readiness statistics.

mcp-citations

github.com/jeffereychown-Max/mcp-citations
updated this year

6 academic citation tools for Claude: DOI lookup, format as BibTeX/APA/MLA/Chicago/Harvard, CrossRef search, batch bibliography. Covers ~120M+ DOIs. Free, MIT.

MIT
@turtletech/ookcite-mcp

github.com/turtletech-ehf/ookcite-mcp
active

MCP server for citation validation, formatting, and collection management. Validates DOIs, formats references in 2900+ CSL styles, manages citation collections, and catches hallucinated citations.

npm MIT
arxiv-mcp

github.com/sandraschi/arxiv-mcp
active

FastMcp 3.2 server plus webapp for human/agentic arxiv and doi paper search, rag and store

MIT ★ 3
@dpm-tools/mcp-citations

github.com/jeffereychown-max/mcp-citations
updated this year

MCP server with 6 tools for academic citations. DOI lookup, format as BibTeX/APA/MLA/Chicago/Harvard, CrossRef search, batch bibliography. Free, MIT.

npm MIT
endnote-for-word

github.com/felimet/endnote-for-word
active

Native EndNote Cite While You Write automation for Microsoft Word: IEEE citations, DOI verification, paper discovery, RIS export, and MCP support for Claude, Codex, and ChatGPT.

MIT ★ 8
annas-mcp

github.com/SokolskyNikita/annas-mcp
active

Anna's Archive MCP server and CLI for Claude, Cursor and Codex: search and download books and papers by title, author or DOI. Signs in with your secret key.

npm MIT ★ 9
unpaywall-mcp

github.com/ElliotPadfield/unpaywall-mcp
updated this year

AnModel Context Protocol (MCP) server for the Unpaywall API. Search article titles, fetch DOI metadata, retrieve best open‑access links, and extract text from OA PDFs—ready for Claude Desktop and any MCP‑compatible client. Ideal for LLM research assistants, literature review, and academic workflows.

MIT ★ 13
@powforge/mcp-identity

github.com/zekebuilds-lab/mcp-identity
updated this year

MCP server exposing PowForge Depth-of-Identity oracle to Claude Code, Cursor, and any MCP-compatible agent. Three tools: doi_score_lookup (priced via L402), doi_sign_vouch (unsigned-event builder), doi_score_verify (offline schnorr verification). The Ligh

npm MIT
annas-mcp
no update data

Search Anna's Archive for books and papers by title, author or DOI, and download the file you pick

smithery
mcp-crossref

github.com/PetrefiedThunder/mcp-crossref
active

MCP server: Search 150M+ academic works, get DOI metadata, citations, journals, and funders.

Apache-2.0
unpaywall-mcp

github.com/elliotpadfield/unpaywall-mcp
updated this year

MCP server for Unpaywall: DOI metadata, title search, OA links, and PDF text extraction

npm MIT
student-citations-mcp

github.com/AnonymousOnyx22/student-citations-mcp
active

Free citation server for AI apps. APA, MLA and Chicago from a DOI, ISBN or details.

npm MIT
mcp-zotero

github.com/Xevos117/mcp-zotero
active

MCP server for Zotero: search and manage your library, add items by DOI, find open access PDFs and insert live Zotero citations into Word documents.

NOASSERTION ★ 39
weft

github.com/spranab/weft
updated this year

Weft — the execution ledger for autonomous coding agents. Verification, not human review, is the merge gate. Paper: doi.org/10.5281/zenodo.21882499

MIT ★ 2
mcp-cloud-remote

github.com/correalenon/mcp-server-locaweb-remote
active

MCP Server em Node.js para infraestrutura em nuvem: Locaweb (VPS/API, SSH) e AWS (CLI v2, SSO, EC2, SSM). Os dois provedores ficam desligados até serem habilitados.

npm MIT
mentu-navigator

github.com/mentu-ai/mentu-navigator
active

Read-only, provenance-first repository navigation and progressive disclosure for agents — a locator with pre-registered evidence behind its defaults (BM25-primary per doi:10.5281/zenodo.21969901). CLI + MCP server.

npm Apache-2.0
space-journey-mcp-engine

github.com/spacelabdevteam-hub/space-journey-mcp-engine
active

Open Standard & Model Context Protocol (MCP) Server for Acoustic Urban Health, Contemplative Travel & Sensory Impact Score (SIS v3.0 | DOI: 10.5281/zenodo.22756473)

NOASSERTION
sip1-mcp-firewall

github.com/Shuliak11/sip1-mcp-firewall
active

SHULIAK SIP-1 v2.6.2: Zero-Egress AI & MCP Firewall (9/9 NIST SP 800-38G FF1 CAVP Verified, OWASP MCP05/06 Guard, EU AI Act AIBOM). CERN DOI: 10.5281/zenodo.24159380

NOASSERTION ★ 1
ZippyServe

github.com/DepressionCenter/ZippyServe
active

ZippyServe is a zero-dependency local web server. It lets you test single-page apps quickly. It serves directories, zips, HTML, and Markdown. [DOI: 10.5281/zenodo.21613944]

GPL-3.0 ★ 1
cred-1

github.com/aloth/cred-1
active

CRED-1: Open, reproducible domain credibility dataset for automated pre-bunking of online misinformation. TypeScript library, CLI & MCP server. Check any news source's reliability from terminal, code, or AI agents. CC BY 4.0, DOI-citable.

npm CC-BY-4.0 ★ 18
College ROI
no update data

U.S. college-ROI data for agents: 30-year NPV for 500 four-year colleges (resident & non-resident pricing), lifetime ROI for 19 major categories + 115 CIP subfields, per-state best-value rankings, and the out-of-state tuition penalty. Free, keyless, CC BY 4.0 (FREOPP/IPEDS/BEA-derived, DOI 10.5281/zenodo.21351602). Also on npm: npx -y college-roi-mcp

smithery
student-citations-mcp

github.com/anonymousonyx22/student-citations-mcp
active

Citation MCP server for AI apps. A citation generator that builds APA, MLA and Chicago citations from a DOI, an ISBN or typed details, with matching in text citations and entries for a works cited list. No account.

npm MIT
bibtex-reference-manager-mcp

github.com/anonymousonyx22/bibtex-reference-manager-mcp
active

BibTeX reference manager MCP server for students writing LaTeX theses and papers. Ask your AI app to fix a broken .bib file, clean a Zotero export or Mendeley export, convert EndNote RIS to BibTeX, remove duplicates, check DOIs and make consistent cite ke

npm MIT
paper-finder-student-mcp

github.com/anonymousonyx22/paper-finder-student-mcp
active

Academic paper search MCP server. Search scholarly papers and sort them by citations or date, keep only the papers whose title matches, keep only one kind of paper, page through the results with a total count, list the papers of one author, do a citation

npm MIT
mcp-zenodo

github.com/mskazemi/mcp-zenodo
updated this year

Model Context Protocol (MCP) server for the Zenodo open-access research repository.

pypi Apache-2.0
scitex-scholar

github.com/scitex-ai/scitex-scholar
active

Scientific literature search and project reference management

AGPL-3.0 ★ 7
citation-check-mcp

github.com/arhancanli/citation-check-mcp
active

Verifies citations: finds fabricated or mismatched references and retractions, returns clean BibTeX.

MIT ★ 1
annas-mcp

github.com/sokolskynikita/annas-mcp
active

Search books with Anna's Archive and papers and dissertations with OpenAlex, then download or read the selected work.

npm MIT
cite-guard

github.com/lonexreb/cite-guard
updated this year

The free, open watchdog for retracted & problematic citations — Retraction Watch + OpenAlex + Crossref, reconciled conservatively. MCP server + web checker, evals-backed.

MIT
citeguard-mcp-server

github.com/wedo911/citeguard
active

MCP server that checks whether a cited paper has been retracted, corrected, or flagged with an expression of concern -- via Crossref, including Retraction Watch records. No API key.

npm MIT