Books
Providers using this tag (54)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Strong 1 Solid coverage with minor gaps
Thin 9 Limited public surface area
Emerging 15 Early or largely undocumented
Minimal 29 Almost no public developer surface
Barnes & NobleBritish National BibliographyWolne LekturyPenguin PublishingRunyankole BibleCrossref Metadata SearchDangdangWonderbly *Better World BooksBlinkistBookoMomoxBhagavad GitaBhagavad GitaEpic! CreationsAmanah SunnahBible-apiGanjoorQuran CloudThe BibleThirukkuralWizard WorldA Bíblia DigitalBhagavad Gita teluguQuran-apiQuranRig VedaVedic SocietyGurbaniNow
APIs with this tag (45)
Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →
Strong 4 Solid coverage with minor gaps
Buttondown Books APIThe Books API from Buttondown — 5 operation(s) covering the Bookshop.org book catalog embedded in newsletters.Zoho BooksThe Zoho Books API allows you to perform all the operations that you do with the web client. It is built us...Kognitos Books APIBrowse and search books, concepts, procedures, connections, and triggers.API League Books APIThe Books API from API League — 2 operation(s) for books.
Thin 10 Limited public surface area
Springer Nature Metadata APIThe legacy Metadata API provides metadata retrieval for Springer publications. Returns article and book met...Gutendex Books APIQuery and retrieve metadata for Project Gutenberg ebooks.Quietforge Book Typesetting APITypesets a prose manuscript into a print-ready book interior (chapter detection, mirrored margins, running ...Literal GraphQL APIGraphQL API for Literal Club that provides access to book data, reading states, shelves, reviews, highlight...ISBNdb Books APIBook endpointsCommon Sense Media Reviews APIJSON REST API exposing Common Sense Media's reviews and ratings catalog. Each review includes recommended a...Rakuten Books Book Search APISearch Rakuten Books for Japanese-language and translated books by title, author, ISBN, publisher, and othe...Rakuten Books Foreign Book Search APISearch Rakuten Books foreign-language books catalog (mostly English-language).Rakuten Books Genre Search APIReturns the genre tree for Rakuten Books, used for browse and navigation across the unified Books catalog.Rakuten Books Total Search APIUnified search across all Rakuten Books catalogs (books, CDs, DVDs, games, software, magazines), returning ...
Emerging 11 Early or largely undocumented
An API of Ice and Fire Books APIBooks from the A Song of Ice and Fire seriesFakerAPI Books APIGenerate fake book records.Blurb Print APIRESTful print-on-demand API that lets businesses integrate Blurb's book, magazine, and notebook printing an...Open Library Editions APIRetrieve edition-level records (specific printings, ISBNs, formats) by Open Library Edition ID, ISBN-10, IS...Open Library Search APISearch Open Library's catalog of books, authors, lists, and subjects. Returns JSON results for full-text an...Open Library Search Inside APIFull-text search across the millions of digitized books in the Internet Archive's collection, returning mat...Open Library Works APIRetrieve work-level records (the abstract concept of a book independent of edition) by Open Library Work ID...Taylor & Francis Content APIThe Taylor & Francis Content API provides programmatic access to eBook and chapter downloads from the taylo...Gutendex APIGutendex is a JSON web API for Project Gutenberg ebook metadata. It provides access to the catalog of 75,00...BookStack REST APIThe BookStack REST API provides programmatic access to manage the full content hierarchy of a BookStack ins...Naver Search Open APINaver Search API returns search results across Naver's catalogs: blog, news, book, encyclopedia, café artic...
Minimal 20 Almost no public developer surface
British National BibliographyBooksWolne LekturyAPI for obtaining information about e-books available on the WolneLektury.pl websiteBhagavad GitaOpen Source Shrimad Bhagavad Gita API including 21+ authors translation in Sanskrit/English/HindiBhagavad GitaBhagavad Gita textAmanah SunnahSemantic search across Quran, Hadith, Tafsir & 18K+ Rijal narratorsBible-apiFree Bible API with multiple languagesGanjoorClassic Persian poetry works including access to related manuscripts, recitations and music tracksPenguin PublishingBooks, book covers and related dataQuran CloudA RESTful Quran API to retrieve an Ayah, Surah, Juz or the entire Holy QuranRunyankole BibleFree REST API for the Runyankore-Rukiga Bible — 66 books, 31106 versesThe BibleEverything you need from the Bible in one discoverable placeThirukkural1330 Thirukkural poems and explanation in Tamil and EnglishWizard WorldGet information from the Harry Potter universeBhagavad Gita teluguBhagavad Gita API in telugu and odia languagesCrossref Metadata SearchBooks & Articles MetadataQuran-apiFree Quran API Service with 90+ different languages and 400+ translationsQuranRESTful Quran API with multiple languagesRig VedaGods and poets, their categories, and the verse meters, with the mandal and sukta numberVedic SocietyDescriptions of all nouns (names, places, animals, things) from vedic literatureGurbaniNowFast and Accurate Gurbani RESTful API
Companies reaching this through an API (8)
These companies publish an API, specification or operation carrying “Books” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.
Score breakdown
Frequency
54.0
log-scaled weighted occurrences
Breadth
1.2
spread across providers
Quality lift
15.0
mean composite of providers using it
Cohesion
2.8
strength of nearest seed neighbor
Related tags
Ebooks 9 co-occurrences
Reading 9 co-occurrences
Publishing 16 co-occurrences
Reviews 5 co-occurrences
Library 8 co-occurrences
Public APIs 24 co-occurrences
Media 13 co-occurrences
Metadata 6 co-occurrences
Where this tag comes from
Provider tag54
Api tag46
Openapi tag6
Openapi op tag16
Markets provisional
Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.
| Market | Share of the market's providers |
|---|---|
| Book Publishing (ONIX / ISBN / EPUB supply chain) | 45% |
Cohort brief
Auto-generatedThe 48 providers in the APIs.io catalog tagged Books, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.
Providers
48
of 54 in the catalog
Mean Kin Score
15.5
-6.7 vs catalog 22.2
Mean Agent Readiness
7.5
-4.5 vs catalog 12
Spread
2.9–58.8
median 11.5 · σ 12.6
How the 48 split by band
Exemplar 0Strong 1Developing 0Thin 9Emerging 14Minimal 24
Facet averages, against the whole catalog
| Facet | This cohort | Catalog | Difference | Scored |
|---|---|---|---|---|
| Discoverability | 55.2 | 57.9 | -2.7 | 48 |
| Contract Quality | 13.6 | 17.2 | -3.6 | 48 |
| Contract Governance | 2.7 | 6.5 | -3.8 | 48 |
| Operational Transparency | 7.2 | 13 | -5.8 | 48 |
| Developer Ergonomics | 15 | 23.2 | -8.2 | 48 |
| Access Clarity | 14.5 | 23.9 | -9.4 | 48 |
A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.
What this cohort publishes
| Artifact | This cohort | Catalog | Difference |
|---|---|---|---|
| MCP server (any) | 2% | 13% | -11 |
| MCP server (first-party) | 2% | 12% | -10 |
| Agent Skills | 0% | 0% | 0 |
| OAuth scopes | 6% | 11% | -5 |
| Security | 100% | 98% | +2 |
| Arazzo workflows | 0% | 2% | -2 |
| Governance rules | 15% | 16% | -1 |
mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.
Top by Kin Score
- 1 API League 58.8
- 2 The New York Times Company 37.3
- 3 Gutendex 35.6
- 4 Google Books 34.1
- 5 WorldCat 33.2
- 6 Literal Club 32.9
- 7 Urantia Papers 32.2
- 8 ISBNdb 30.2
- 9 Common Sense Media 29.8
- 10 Rakuten 28.2
Top by Agent Readiness
- 1 Urantia Papers 44.1
- 2 WorldCat 34.6
- 3 Gutendex 31.2
- 4 API League 31.1
- 5 An API of Ice and Fire 28.4
- 6 Google Books 25.4
- 7 The New York Times Company 24.5
- 8 Rakuten 23.9
- 9 Common Sense Media 22.7
- 10 ISBNdb 20.3
All 54 members of this roster resolve to a provider in the
catalog; 48 carry a score (89%).
The figures above describe the scored members only.
Coverage caveat. 44 of 48 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 24 October 2026, across 31984 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.
Coverage caveat. 44 of 48 scored members had under half their catalog-attributable points satisfied at all (catalog_earned / catalog_max < 0.5). They are INCLUDED in the mean above. A large share here means the cohort mean is partly a measurement of how far our enrichment reached, not only of how these providers publish.Generated from the catalog build of 24 October 2026, across 31984 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.