arcsecond.io
Science & Math
Multiple astronomy data sources
No keyCORSHTTPS
Crossref REST API
The Crossref REST API allows users to search and retrieve metadata for scholarly works, including DOIs, ISSNs, and funder identifiers. It provides access to various endpoints that expose data on works, journals, funders, and more, facilitating sophisticated searches and integrations for research purposes.
Verified 4 days ago: 100% uptime
API key
Unconfirmed
HTTPS
Not supported
Browser calls
Yes, CORS enabled
Status
Live · 98/100
What our checks found
- Health score
- 98/100
- Reliability
- 100%
- Average latency
- 3441ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for Crossref REST API. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# Authentication requirement is unconfirmed. Check the documentation before relying on this.
curl -s "http://api.crossref.org/ENDPOINT" \
-H "Authorization: Bearer YOUR_TOKEN" \
-H "Accept: application/json"This API is served over plain HTTP. Browsers block HTTP requests made from an HTTPS page, so you will need a server-side call.
Where this listing comes from
Aggregated from one public source (freepublicapis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
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Crossref REST API — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is Crossref REST API free to use?
Crossref REST API is listed in our free catalogue, but it requires some form of authentication, so you will need to register before your first call. Providers frequently reserve higher limits and commercial use for paid plans.
Does Crossref REST API need an API key?
Crossref REST API requires some form of authentication. Check the provider's documentation for which scheme it expects.
Can I call Crossref REST API from browser JavaScript?
Yes. Crossref REST API returned CORS headers when we checked it, so a browser will let your page read the response. You can fetch it directly from client-side JavaScript with no proxy and no backend.
Is Crossref REST API still working?
Yes, as of 2026-09-18. Our automated check reached Crossref REST API and recorded a 100% reliability score with a median response time of 3441 ms. We re-check on a schedule, and this page updates with the result.
Is Crossref REST API available over HTTPS?
No. Crossref REST API was only reachable over plain HTTP when we checked. Browsers block HTTP requests made from an HTTPS page, so this will fail in production unless you call it from a server instead.