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Crossref is a useful first stop when a citation needs a DOI, publisher record, or update trail. Its REST API serves JSON metadata deposited by members and trusted sources, with search, filters, and single-DOI lookup. The documentation states that sign-up is unnecessary.
A practical lookup starts with the DOI, then checks title, authors, dates, and update relations against the publisher record. A successful metadata match identifies a work; evaluating its conclusion still means reading the work. Crossref metadata can include abstracts, whose reuse conditions may differ from the surrounding metadata.
Documentation reviewed; no API request was tested for this page. Add a dated example if you find an ambiguous citation or a correction worth keeping.
Sources: Crossref REST API.
Record: documentation-reviewed. Prepared 2026-09-11T00:52:03+00:00. Site seed.