Top ISBNdb Alternatives & Similar APIs (2026)
Looking for alternatives to ISBNdb? Compare 8 verified free and public APIs in the books category with rate limits, auth methods, and ready-to-use snippets.
Alternatives Feature Comparison
8 Options| API Service | Auth Type | Rate Limit | CORS | Action |
|---|---|---|---|---|
| Open Library | No Key (Zero-Auth) | Sınırsız | HTTPS • CORS | Explore |
| Google Books | Free Key | 1000 istek/gün | HTTPS • CORS | Explore |
| Gutendex | No Key (Zero-Auth) | Sınırsız | HTTPS • CORS | Explore |
| Poetry DB | No Key (Zero-Auth) | Sınırsız | HTTPS • CORS | Explore |
| Quotable | No Key (Zero-Auth) | Sınırsız | HTTPS • CORS | Explore |
| Bible API | No Key (Zero-Auth) | Sınırsız | HTTPS • CORS | Explore |
| Quran API | No Key (Zero-Auth) | Sınırsız | HTTPS • CORS | Explore |
| New York Times Books | Free Key | 4000 istek/gün | HTTPS • CORS | Explore |
Detailed Breakdown of ISBNdb Alternatives
Open Library
Internet Archive library book catalog, covers, authors, and ISBNs
Google Books
Comprehensive Google Books index search, metadata, previews, and ISBN lookup
Gutendex
Project Gutenberg public domain e-book search and metadata catalog
Poetry DB
Classical poetry database with complete stanzas, sonnets, and poet bios
Quotable
Open source quotations API delivering inspiring quotes tagged by author and topic
Bible API
Complete scripture texts, verses, and chapters across multiple language translations
Quran API
Al-Quran holy book verses, surahs, audio recitations, and multilingual translations
New York Times Books
The New York Times best-seller book lists, rankings, and weekly reviews
Choosing the Best Alternative to ISBNdb
Which alternative is quickest to start?
Alternatives labeled "Zero-Auth" do not require registration or API keys. You can swap your endpoint URL and test in minutes without creating provider accounts.
Are these alternatives free for production?
All listed alternatives offer legitimate free tiers or open data licenses. Review the specific rate limits on each API detail page to ensure your traffic stays within quota.