A
licenseNot graded
qualityC
maintenanceSearches and retrieves scholarly metadata from the CrossRef REST API, covering over 150 million records across all disciplines, without requiring an API key.
MIT
Free scholarly paper and DOI discovery via Crossref. Self-service registration; no invitation.
Search 150M+ academic works, journals, and funders via Crossref API.
Crossref MCP — wraps the Crossref REST API (academic papers, free, no auth)
Scholarly search: OpenAlex, Crossref, arXiv, OpenCitations and PubMed in one endpoint.
Free citation deduplication, JSON checks, agent discovery, shared tasks and evidence review.
Add one secure layer between your agents and this server.