Pubmed MCP Server vs Pyscn
Two MCP servers from our science & health ranking, compared on live data - updated nightly, never sponsored.
Bottom line · 2026-09-18
Pubmed MCP Server records significantly more monthly package installs (13,671 vs 2,346); both are actively maintained, with commits inside the last month.
How they differ in kind
Pubmed MCP Server focuses on: @cyanheads/pubmed-mcp-server Search PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms via MCP. Pyscn focuses on: Python code analysis for AI agents: complexity, dead code, clones, coupling, and a health score. Pubmed MCP Server offers a remote endpoint; Pyscn is local stdio. Environment-variable extraction: Pubmed MCP Server yielded 3 variables; Pyscn yielded 1 variable. Implementation languages differ (TypeScript vs Go).
What each one does
Pubmed MCP Server
@cyanheads/pubmed-mcp-server Search PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms via MCP. STDIO or Streamable HTTP. Its 11 documented tools cover pubmed, articles, europepmc.
From the project's README.
Pyscn
Python code analysis for AI agents: complexity, dead code, clones, coupling, and a health score. It runs locally over stdio via the published package.
From the project's README.
14 signals, side by side
| Signal | Pubmed MCP Server | Pyscn |
|---|---|---|
| Monthly installs | 13,671 | 2,346 |
| GitHub stars | 148 | 1,068 |
| Last commit | 2026-09-13 | 2026-09-17 |
| Releases · last 90 days | 10+ | 10+ |
| In the registry since | Sep 2025 | Jul 2026 |
| Registry versions | 85 | 10 |
| Documented tools | 11 | not extracted - see README |
| Env vars extracted | 3 | 1 |
| Runs | local or remote | local (stdio) |
| Endpoint auth | none (verified open) | local only |
| Maintenance | actively maintained | actively maintained |
| License | Apache-2.0 | MIT |
| Language | TypeScript | Go |
| Category rank | #2 of 71 | #3 of 71 |
What their tools cover
Extracted from each project's README - the tools each server hands your agent. A missing list means the README doesn't document one, not that no tools exist.
Pubmed MCP Server 11 tools documented
pubmed_search_articles- Search PubMed with full query syntax, field-specific filters, date…pubmed_europepmc_search- Search Europe PMC for preprints, patents, Agricola, and EPMC-only OA…pubmed_europepmc_fetch- Fetch complete Europe PMC records - including the untruncated…pubmed_fetch_articles- Fetch full article metadata by PMIDs - abstract, authors, journal…pubmed_fetch_fulltext- Fetch full-text articles via a chain: NCBI PMC EFetch → Europe PMC…pubmed_format_citations- Generate formatted citations in APA 7th, MLA 9th, BibTeX, RIS, or…pubmed_find_related- Find similar articles, citing articles, or references for a given PMIDpubmed_spell_check- Spell-check a biomedical query via NCBI ESpell - returns the…
+3 more on the full page
Pyscn no tool list in README
Environment variables found in the READMEs
These are extracted names, not a requiredness check. Project docs may mark them optional or require other setup.
Pubmed MCP Server
- MCP_TRANSPORT_TYPE
- MCP_LOG_LEVEL
- NCBI_API_KEY
Pyscn
- PYSCN_CONFIG
Which one, for what
Derived from the signals above, not hands-on testing.
Pick Pubmed MCP Server if…
- → you want the more widely installed option - 13,671 monthly installs vs 2,346
- → you want a hosted endpoint instead of running a local process
Pick Pyscn if…
- → you prefer a Go codebase to extend or audit
- → category standing - #3 of 71 maintained science & health servers
Who's behind them
Pubmed MCP Server - cyanheads: 125 MCP servers tracked, 119 maintained, 1,816 combined stars. Full record.
Pyscn - ludo-technologies: 1 MCP server tracked, 1 maintained, 1,068 combined stars.
Not sold on either?
The next-ranked science & health servers we track:
Arxiv MCP Server (blazickjp)
Search arXiv papers, download full text, semantic search, citation graphs, and alerts via MCP.
★ 3,159 · commit 2026-08-26
Clinicaltrialsgov MCP Server
Search ClinicalTrials.gov - find studies, retrieve results, match patients to eligible trials.
★ 94 · commit 2026-09-13
Quick answers
Is Pubmed MCP Server better than Pyscn?
Package installs favor Pubmed MCP Server: 13,671 monthly installs to 2,346. Pyscn still ranks #3 of 71 maintained science & health servers. Data as of 2026-09-18; we haven't hands-on tested either.
Can I use Pubmed MCP Server and Pyscn together?
Yes - MCP clients accept multiple servers in one config, so you can enable both science & health servers side by side. If their tools overlap, keep the one whose toolset fits to keep your agent's tool list lean.
What environment variables do their READMEs document?
Pubmed MCP Server: 3 environment variables extracted from the README setup; Pyscn: 1 environment variable extracted from the README setup. Extraction does not rule out other authentication or configuration steps; check each project's current documentation.
Keep exploring: best science & health servers · TypeScript servers · Go servers · all comparisons · every server
Methodology: package-usage signal = npm/PyPI installs (last month, platform APIs) · maintenance = commit recency + release cadence (GitHub) · tool lists and environment-variable names extracted from each project's README · endpoint auth from our own nightly probes. We haven't hand-tested these servers; everything here is data as of 2026-09-18.