AltAPIs

API archive entry · source-reported

Crossref Metadata Search

Books & Articles Metadata

Provider / source website

From the publisher

README & documentation

Source preview

Read the project’s overview, installation instructions and usage examples. The original README is the source of truth.

The Crossref REST API has been updated to use Elasticsearch instead of Solr -- read more about that project here. This documentation is deprecated. Documentation for the new API can still be found at https://api.crossref.org/, and issues should be reported to us via the community forum or support@crossref.org. The Crossref REST API is one of a variety of tools and APIs that allow anybody to search and reuse our members' metadata in sophisticated ways. If you read nothing else, please at least look at the API TIPs document and the "Etiquette" section of this document. It will save you (and us) much heartburn. Records typically appear in the REST API within 20 minutes of their having been successfully deposited with Crossref. Summary information (e.g. counts, etc.) are processed in batch every 24 hours. We record and report service issues on our status page. You might want to check this to…

CrossRef/rest-api-doc on GitHub A short preview, not the full document.

Read the full README ↗ · Preview checked 2026-10-27T20:30:47.201Z

Inside the original README — Document outline
  1. Crossref REST API
  2. DEPRECATION NOTICE
  3. Preamble
  4. Meta
  5. Frequency of indexing
  6. Learning about performance or availability problems
  7. Reporting performance or availability problems
  8. Reporting bugs, requesting features
  9. Documentation License
  10. Metadata License
  11. Privacy
  12. Libraries

Headings are captured from the source. Links open the publisher’s document, not a locally hosted copy.

Links from the README

References supplied by the publisher, not independently verified endorsements. Check the destination before downloading files or entering credentials.

Documentation belongs to its respective authors. A listing is not a grant of reuse or training rights. Confirm the document’s own terms at the source.

Access at a glance

These are reported access facts. Check the current documentation before integrating.

  • Authentication: No auth.
  • HTTPS: reported by the source.
  • Browser access (CORS): Unknown.

Pricing and limits

Current plans, quotas, and rate limits have not been reviewed for this listing. Check the provider’s current terms; no authentication does not necessarily mean free usage.

Documentation and sources

Imported from public-apis/public-apis. A detailed editorial review has not been published yet.

Provider / source reference

public-apis/public-apis · MIT directory metadata

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BookRank

Book rankings from open reader ratings: books, series, reading orders and authors

No auth · HTTPS reported · CORS Yes

Greenlit Books

Catalog of practical AI books with search, series, glossary and a claim ledger

No auth · HTTPS reported · CORS Yes

Source reference

public-apis/public-apis

This page separates source-reported facts from questions that need live provider verification.