crossref-mcp-server

How to connect

• crossref_get_work

  Resolves a DOI to its full Crossref metadata record: title, authors, affiliations, abstract (when deposited), journal or container, publication date, type, license, full-text links, funder acknowledgements, and outgoing reference list. The is_referenced_by_count field reports the total incoming citation count from Crossref; the citing works themselves are not available through Crossref — use OpenAlex for citation graphs.

• crossref_get_references

  Returns the outgoing reference list for a DOI — the works cited by this paper. Each reference includes the raw citation string and, where Crossref has resolved it, a DOI you can look up with crossref_get_work. Reference list coverage varies by publisher; many older works and non-participating publishers have no indexed references. Incoming citations — the works that cite this paper — are not available through Crossref; use OpenAlex for that.

• crossref_search_works

  Searches the Crossref works index (~155M records) by free text and/or structured filters. Use the filter parameter for structured filtering (object with hyphen-separated Crossref keys). Sort options: relevance, score, is-referenced-by-count, published, deposited, indexed. Offset-based paging is capped at ~10K results; use cursor="*" to start cursor-based deep paging, then pass the nextCursor value from each response to continue. Cursor and offset cannot be combined.

• crossref_search_journals

  Finds Crossref journal records by ISSN or title query. Provide issn for an exact single-journal lookup, or query for title-based search returning up to rows results. Set include_works to true to fetch the journal's most recent registered works in a second call (sequential — requires a resolved ISSN from step 1). Returns journal metadata: title, publisher, ISSN-L, subject areas, and total DOI count.

• crossref_search_funders

  Finds funders registered in the Crossref Funder Registry by name or funder DOI. Provide funder_doi for an exact single-funder lookup (accepts the full DOI like "10.13039/100000001" or just the registry ID), or query for name-based search. Set include_works to true to fetch a paginated list of works funded by the first matched funder (adds a second upstream call). Returns funder name, DOI, country, and alternate names.

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