Name: biorxiv-mcp-server
Author: cyanheads

@cyanheads/biorxiv-mcp-server

Search and retrieve bioRxiv and medRxiv preprints — by DOI, date interval, or keyword — via MCP. STDIO or Streamable HTTP.

5 Tools

Five tools for working with bioRxiv and medRxiv preprint data:

Tool	Description
`biorxiv_get_preprint`	Fetch full metadata, abstract, revision history, and journal crosswalk for one or more preprints by DOI
`biorxiv_list_recent`	List preprints posted or updated within a date interval, with optional server and category filters
`biorxiv_search_preprints`	Search preprints by keyword via EuropePMC for relevance ranking, enriched with bioRxiv/medRxiv metadata
`biorxiv_get_published_version`	Resolve a preprint DOI to its journal publication record (journal DOI, name, published date)
`biorxiv_list_categories`	List valid subject category strings for bioRxiv and medRxiv

Fetch preprint metadata by DOI — all revisions in one call.

Batch fetch up to 10 DOIs in a single request
Each DOI returns the full revision history in collection[] — one API call per DOI, no enumeration loop
Includes title, authors, abstract, category, license, PDF link (jatsxml), and published journal DOI when the preprint has been accepted
Scope to biorxiv, medrxiv, or both; when both, each DOI fans out in parallel and partial failures report per-DOI in failed[]

Page through preprints in a date interval.

Server-side category filtering via ?category=… — pass a value from biorxiv_list_categories
Fixed page size of 30 (API constraint); advance with integer cursor (0, 30, 60, …)
Response includes total count per server for calculating remaining pages
When server="both", each server paginates independently; response surfaces per-server pagination state ({ biorxiv: { cursor, total }, medrxiv: { cursor, total } })

Keyword search with relevance ranking.

EuropePMC powers relevance ranking (indexes new preprints within 1–2 days of posting); bioRxiv/medRxiv API provides canonical metadata enrichment
Covers both servers by default; scope down with server
Optional date range filters (date_from, date_to)
Enrichment failures degrade gracefully to EuropePMC-only metadata, surfaced via partial_results

Resolve a preprint DOI to its journal publication crosswalk.

Uses the /pubs/{server}/{doi} endpoint for richer metadata than the published field in biorxiv_get_preprint
Returns journal DOI, journal name, published date, and corresponding author institution
Use when the preprint's published field is non-null and you need the full crosswalk record

Return the static subject category taxonomy for both servers.