@skeems/crossref

Read-only CrossRef adapter for skeem — scholarly works keyed by DOI, with ORCID and funder metadata.

adapter: crossref
connection:
  url: https://api.crossref.org
  mailto: [email protected]   # optional but recommended: joins CrossRef's "polite pool"

No API key. mailto identifies you to CrossRef for better rate limits; it is sent as a query param and in the User-Agent.

Tier: Read

One collection — works — keyed by the lowercase DOI.

skeem get works 10.7554/elife.02181 --json
skeem get works "https://doi.org/10.7554/eLife.02181" --json   # prefixes stripped
skeem find works --where title="pre-mRNA splicing" --json
skeem find works --where orcid=0000-0002-1641-3403 --json      # reverse pivot by author
skeem find works --where issn=2050-084X --limit 5 --json

get returns { id, title, type, container_title, publisher, issued, authors, externalIds }. Authors carry bare ORCIDs where present; externalIds (shared vocabulary — see docs/reference/external-ids.md) flattens them to record level (orcid), plus funder_doi (funder registry DOIs), issn, and isbn_10/isbn_13 for books. The work's own DOI is the record id and is not repeated in externalIds.

Notes

• DOIs are normalized (URL/doi: prefixes stripped, lowercased) and path-encoded per segment, so DOIs containing #, ?, <, >, ; (e.g. legacy SICI DOIs) work.
• A 404 may mean the DOI is registered with another agency (DataCite, mEDRA, …) rather than not existing — the error message says so.
• Dates are partial ("2014", "2014-02") and surface as strings.
• --sort is unsupported; --limit/--offset are native (offset ≤ 10k).

Writes are rejected as read-only.