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Crossref Metadata Search

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Amanah Sunnah Semantic search across Quran, Hadith, Tafsir & 18K+ Rijal narrators
Bhagavad Gita Open Source Shrimad Bhagavad Gita API including 21+ authors translation in Sanskrit/English/Hindi
Bhagavad Gita telugu Bhagavad Gita API in telugu and odia languages
Bible-api Free Bible API with multiple languages
BookRank Book rankings from open reader ratings: books, series, reading orders and authors
British National Bibliography Books
Ganjoor Classic Persian poetry works including access to related manuscripts, recitations and music tracks
Google Books Books
Greenlit Books Catalog of practical AI books with search, series, glossary and a claim ledger
GurbaniNow Fast and Accurate Gurbani RESTful API
Gutendex Web-API for fetching data from Project Gutenberg Books Library
KDP Intelligence KDP niche demand scores, competition analysis and revenue estimates

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Catalog updated Nov 5, 2026.

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