@pipeworx/opencitations

Connect: https://gateway.pipeworx.io/opencitations/mcp · Install: one-click buttons

Tools: 6

OpenCitations MCP — open-license citation index (COCI + Index APIs). Keyless.

Tools

• references(doi) — DOIs cited BY the given DOI
• citations(doi) — DOIs that cite the given DOI
• citation_count(doi) — number of incoming citations for a DOI
• references_count(doi) — number of outgoing references for a DOI
• metadata(dois) — bibliographic metadata for one or more DOIs (comma-sep list, max 50)
• citation(oci) — a single citation by Open Citation Identifier

Data source

https://opencitations.net/index/coci/api/v1/ (COCI) and https://opencitations.net/index/api/v1/ (generic Index endpoints).

Tools

• 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,
• 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 im
• 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, n
• 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, jou
• 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 `ci