Penguin Publishing
Books
Books, book covers and related data
No keyCORSHTTPS
Gutendex
JSON web API for Project Gutenberg ebook metadata. Provides book information, search, and filtering options. Hosted on GitHub.
Checked 4 days ago: not responding
API key
Not required
HTTPS
Supported
Browser calls
Unconfirmed
Status
Failing · 3/100
What our checks found
- Health score
- 3/100
- Reliability
- 8%
- Average latency
- 6264ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for Gutendex. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# No authentication required.
curl -s "https://gutendex.com/ENDPOINT" \
-H "Accept: application/json"Where this listing comes from
Aggregated from 2 public sources (freepublicapis, public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
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Gutendex — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is Gutendex free to use?
Gutendex 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 Gutendex need an API key?
No. We called Gutendex 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 Gutendex from browser JavaScript?
We could not confirm CORS support for Gutendex. Test it from a browser before relying on it client-side; if the request succeeds in curl but fails in the console, CORS is the reason.
Is Gutendex still working?
Not at our last check on 2026-09-18. Gutendex did not respond successfully, which is why it is marked as down here. This may be temporary; we re-check on a schedule and the badge above reflects the most recent run.
Is Gutendex available over HTTPS?
Yes. Gutendex serves over HTTPS, so you can call it from a secure page without triggering a mixed-content block.