MCP server exposing 6 tools for opencitations.
This URL is a JSON-RPC 2.0 endpoint over HTTP. Issue POST requests with a JSON-RPC body. Browsers and search crawlers land here on GET.
POST https://gateway.pipeworx.io/opencitations/mcp
Content-Type: application/json
{"jsonrpc":"2.0","id":1,"method":"tools/list"}references — "What does paper [DOI] cite" / "references in [paper]" / "what sources does this paper use" — DOIs cited BY the given DOI (the paper's reference list / bibliography). Use for citation-graph traversal, literature review, source tracking.citations — "Who cites paper [DOI]" / "what papers reference [DOI]" / "incoming citations to [paper]" / "what work has cited [study]" — DOIs that CITE the given DOI (reverse-direction from references). Use for impact analysis, follow-on research discovery, "is this paper influential" questions.citation_count — "How many times has paper [DOI] been cited" / "citation count for [paper]" / "is [study] highly cited" — incoming citation count for a DOI. Fast version of `citations` when you only need the number, not the citing DOIs.references_count — "How many references does paper [DOI] have" / "how big is the bibliography of [paper]" — outgoing reference count for a DOI. Fast version of `references` when you only need the number.metadata — "Get paper info for [DOI]" / "bibliographic details for [paper]" / "title / authors / year of [DOI]" — bibliographic metadata for one or more DOIs (up to 50 at once). Returns title, authors, year, journal, publisher.citation — Fetch one citation record by its Open Citation Identifier (OCI — a compound ID of the form citing-DOI__cited-DOI). Returns citing/cited DOI pair, creation date, and journal self-citation flag. Use `citations` or `references` instead when you only have a DOI.Code samples (curl / TypeScript / one-click client install), schemas, and the live playground are on the pack page:
https://pipeworx.io/packs/opencitations/
Pipeworx is an open MCP gateway connecting AI agents to live data. pipeworx.io