Penguin Publishing
Books
Books, book covers and related data
No keyCORSHTTPS
Crossref Metadata Search
Books & Articles Metadata
Verified 4 days ago: 100% uptime
API key
Not required
HTTPS
Supported
Browser calls
No, needs a proxy
Status
Live · 100/100
What our checks found
- Health score
- 100/100
- Reliability
- 100%
- Average latency
- 1567ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for Crossref Metadata Search. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# No authentication required.
curl -s "https://github.com/ENDPOINT" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
Where this listing comes from
Aggregated from one public source (public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
Other Books APIs
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Books
RESTful Quran API with multiple languages
No keyCORSHTTPS
Rig Veda
Books
Gods and poets, their categories, and the verse meters, with the mandal and sukta number
No keyCORSHTTPS
Runyankole Bible
Books
Free REST API for the Runyankore-Rukiga Bible — 66 books, 31106 verses
No keyCORSHTTPS
Wolne Lektury
Books
API for obtaining information about e-books available on the WolneLektury.pl website
No keyCORSHTTPS
Bhagavad Gita telugu
Books
Bhagavad Gita API in telugu and odia languages
No keyHTTPS
Crossref Metadata Search — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is Crossref Metadata Search free to use?
Crossref Metadata Search is listed in our free catalogue and required no credential when we called it. It needs no authentication at all, so you can send a request without signing up. Free tiers can still carry rate limits or non-commercial terms, so check the provider's own terms before shipping.
Does Crossref Metadata Search need an API key?
No. We called Crossref Metadata Search on 2026-09-18 with no key, no token and no Authorization header, and it responded. That is what puts it in our no-key collection.
Can I call Crossref Metadata Search from browser JavaScript?
Not directly. Crossref Metadata Search did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is Crossref Metadata Search still working?
Yes, as of 2026-09-18. Our automated check reached Crossref Metadata Search and recorded a 100% reliability score with a median response time of 1567 ms. We re-check on a schedule, and this page updates with the result.
Is Crossref Metadata Search available over HTTPS?
Yes. Crossref Metadata Search serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.