niche · 2.3 capabilitymarket resourceindustry

Books

Score 19.5 / 100 65 providers 48 APIs Search apis.io →
Variants seen in the corpus: Booksbooks

Providers using this tag (65)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 2 Complete, well-documented, and agent-ready
ButtondownAnalyticsAutomationsEmailMarkdown30 APIs71.5PolygonFinanceFintechMarket DataStocks12 APIs71.5
Strong 1 Solid coverage with minor gaps
FactsetFinancialFinancial DataInvestment AnalyticsMarket Data460 APIs64.8
Developing 6 Usable, with meaningful gaps to close
GutendexCatalogEbooksLibrary1 API45.5The New York TimesArticlesMoviesNews7 APIs44.5WorldCatLibrariesBibliographic RecordsWorldCatOCLC20 APIs44.1ISBNdbISBNPublishingMetadata8 APIs42.7The New York Times CompanyNewsMediaPublishingNewspapers15 APIs41.7Google BooksEbooksGoogleLibrary3 APIs40.1
Thin 12 Limited public surface area
ZohoAnalyticsCollaborationCRMCustomer Service34 APIs38.5Springer NatureAcademic PublishingOpen AccessResearchScholarly Content4 APIs36.7RakutenE-CommerceTravelRecipes33 APIs36.6Next Big Idea ClubCompanyMediaSubscription1 API35.9An API of Ice and FireGame of ThronesASOIAFA Song of Ice and Fire3 APIs34.5Literal ClubReadingSocialGraphQL1 API32.7Common Sense MediaApplicationMediaMovies2 APIs30.4Taylor & FrancisAcademicJournalsMetadata4 APIs28.5OverDriveCompanyLibrariesEbooks3 APIs28.4Project GutenbergEbooksPublic DomainLiterature1 API28.2FakerAPITest DataFake DataMockingDeveloper Tools10 APIs26.7Open LibraryAuthorsCatalogCovers19 APIs26.3
Emerging 14 Early or largely undocumented
BlurbCompanyPublishingPrintingPrint on Demand1 API23.4GoodreadsCompanyConsumerReading23.3BookStackWikiDocumentationKnowledge BaseSelf-Hosted1 API22.6LiteratiCompanyPublishingEducation18.6BookbubCompanyPublishingEbooks17.3NaverSearchTranslationMapsCloud Platform18 APIs15.8WattpadCompanyConsumerStorytellingPublishing15.1An API of Ice And FireVideoPublic APIsOpen-SourceGame of Thrones4 APIs14.1PublishizerCompanyPublishingCrowdfunding13.324SymbolsCompanyEbooksReading13.2API LeagueAPI MarketplaceDeveloper ToolsFood1 API13.0BinderyCompanyPublishingCommunity12.8SolCompanyConsumerConsumer ElectronicsHardware12.7BookoCompanyPrice ComparisonE-Commerce11.0
Minimal 30 Almost no public developer surface
MomoxCompanyRecommerceMarketplaceSecondhand10.6Barnes & NobleRetailPublishingEbooks7.4Barnes & NobleBooksellerE-CommerceEducation6.6A Bíblia DigitalPublic APIs1 API5.7Amanah SunnahPublic APIs1 API5.7Bhagavad GitaPublic APIs1 API5.7Bhagavad GitaPublic APIs1 API5.7Bhagavad Gita teluguPublic APIs1 API5.7Bible-apiPublic APIs1 API5.7British National BibliographyPublic APIs1 API5.7GanjoorPublic APIs1 API5.7Penguin PublishingPublic APIs1 API5.7QuranPublic APIs1 API5.7Quran CloudPublic APIs1 API5.7Rig VedaPublic APIs1 API5.7Runyankole BiblePublic APIs1 API5.7The BiblePublic APIs1 API5.7ThirukkuralPublic APIs1 API5.7Vedic SocietyPublic APIs1 API5.7Wizard WorldPublic APIs1 API5.7Wolne LekturyPublic APIs1 API5.7Urantia PapersPublic APIs1 API5.4Crossref Metadata SearchPublic APIs1 API5.0DangdangCompanyConsumerE-CommerceRetail5.0GurbaniNowPublic APIs1 API5.0PoetryDBPublic APIs1 API5.0Quran-apiPublic APIs1 API5.0Wonderbly *CompanyConsumerE-CommercePersonalization5.0Epic! CreationsCompanyEducationEdTechReading4.6BlinkistCompanyEducationLearning2.5

APIs with this tag (47)

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 →

Exemplar 2 Complete, well-documented, and agent-ready
Buttondown Books APIThe Books API from Buttondown — 5 operation(s) covering the Bookshop.org book catalog embedded in newsletters.71.5Polygon Books APILevel-2 order book.71.5
Strong 1 Solid coverage with minor gaps
Factset Books APIThe Books API from Factset — 3 operation(s) for books.64.8
Developing 2 Usable, with meaningful gaps to close
Gutendex Books APIQuery and retrieve metadata for Project Gutenberg ebooks.45.5ISBNdb Books APIBook endpoints42.7
Thin 16 Limited public surface area
Zoho BooksThe Zoho Books API allows you to perform all the operations that you do with the web client. It is built us...38.5Springer Nature Metadata APIThe legacy Metadata API provides metadata retrieval for Springer publications. Returns article and book met...36.7Rakuten Books Book Search APISearch Rakuten Books for Japanese-language and translated books by title, author, ISBN, publisher, and othe...36.6Rakuten Books Foreign Book Search APISearch Rakuten Books foreign-language books catalog (mostly English-language).36.6Rakuten Books Genre Search APIReturns the genre tree for Rakuten Books, used for browse and navigation across the unified Books catalog.36.6Rakuten Books Total Search APIUnified search across all Rakuten Books catalogs (books, CDs, DVDs, games, software, magazines), returning ...36.6An API of Ice and Fire books APIBooks from the A Song of Ice and Fire series34.5Literal GraphQL APIGraphQL API for Literal Club that provides access to book data, reading states, shelves, reviews, highlight...32.7Common Sense Media Reviews APIJSON REST API exposing Common Sense Media's reviews and ratings catalog. Each review includes recommended a...30.4Taylor & Francis Content APIThe Taylor & Francis Content API provides programmatic access to eBook and chapter downloads from the taylo...28.5Gutendex APIGutendex is a JSON web API for Project Gutenberg ebook metadata. It provides access to the catalog of 75,00...28.2FakerAPI Books APIGenerate fake book records.26.7Open Library Editions APIThe Editions API from Open Library — 1 operation(s) for editions.26.3Open Library Search APIThe Search API from Open Library — 2 operation(s) for search.26.3Open Library Search Inside APIFull-text search across the millions of digitized books in the Internet Archive's collection, returning mat...26.3Open Library Works APIThe Works API from Open Library — 1 operation(s) for works.26.3
Emerging 4 Early or largely undocumented
Blurb Print APIRESTful print-on-demand API that lets businesses integrate Blurb's book, magazine, and notebook printing an...23.4BookStack REST APIThe BookStack REST API provides programmatic access to manage the full content hierarchy of a BookStack ins...22.6Naver Search Open APINaver Search API returns search results across Naver's catalogs: blog, news, book, encyclopedia, café artic...15.8An API of Ice And Fire Books APIBooks in the A Song of Ice and Fire series.14.1
Minimal 22 Almost no public developer surface
Amanah SunnahSemantic search across Quran, Hadith, Tafsir & 18K+ Rijal narrators5.7Bhagavad GitaOpen Source Shrimad Bhagavad Gita API including 21+ authors translation in Sanskrit/English/Hindi5.7Bhagavad GitaBhagavad Gita text5.7Bhagavad Gita teluguBhagavad Gita API in telugu and odia languages5.7Bible-apiFree Bible API with multiple languages5.7British National BibliographyBooks5.7GanjoorClassic Persian poetry works including access to related manuscripts, recitations and music tracks5.7Penguin PublishingBooks, book covers and related data5.7QuranRESTful Quran API with multiple languages5.7Quran CloudA RESTful Quran API to retrieve an Ayah, Surah, Juz or the entire Holy Quran5.7Rig VedaGods and poets, their categories, and the verse meters, with the mandal and sukta number5.7Runyankole BibleFree REST API for the Runyankore-Rukiga Bible — 66 books, 31106 verses5.7The BibleEverything you need from the Bible in one discoverable place5.7Thirukkural1330 Thirukkural poems and explanation in Tamil and English5.7Vedic SocietyDescriptions of all nouns (names, places, animals, things) from vedic literature5.7Wizard WorldGet information from the Harry Potter universe5.7Wolne LekturyAPI for obtaining information about e-books available on the WolneLektury.pl website5.7Urantia PapersFull-text + semantic search across the Urantia Papers, with audio narration, entities, translations5.4Crossref Metadata SearchBooks & Articles Metadata5.0GurbaniNowFast and Accurate Gurbani RESTful API5.0PoetryDBEnables you to get instant data from our vast poetry collection5.0Quran-apiFree Quran API Service with 90+ different languages and 400+ translations5.0

Score breakdown

Frequency
56.0
log-scaled weighted occurrences
Breadth
1.8
spread across providers
Quality lift
22.7
mean composite of providers using it
Cohesion
3.1
strength of nearest seed neighbor

Related tags

Ebooks 9 co-occurrences Reading 9 co-occurrences Publishing 15 co-occurrences Reviews 5 co-occurrences News 6 co-occurrences Public APIs 27 co-occurrences Library 5 co-occurrences Media 14 co-occurrences

Where this tag comes from

Provider tag56
Api tag48
Openapi tag8
Openapi op tag20

Cohort brief

Auto-generated

The 65 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
65
all scored
Mean Kin Score
19.2
-1.5 vs catalog 20.7
Mean Agent Readiness
8.9
-0.8 vs catalog 9.7
Spread
2.5–71.5
median 12.8 · σ 17.1
How the 65 split by band
Exemplar 2Strong 1Developing 6Thin 12Emerging 14Minimal 30
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Discoverability 62.2 60.4 +1.8 65
Contract Governance 5.8 6.4 -0.6 65
Operational Transparency 10.4 11.3 -0.9 65
Contract Quality 16.5 17.5 -1 65
Access Clarity 20.3 22.3 -2 65
Developer Ergonomics 12.9 17.9 -5 65

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
ArtifactThis cohortCatalogDifference
MCP server (any) 9% 16% -7
MCP server (first-party) 3% 7% -4
Agent Skills 0% 0% 0
OAuth scopes 8% 9% -1
Security 89% 88% +1
Arazzo workflows 2% 2% 0
Governance rules 20% 13% +7

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. 1 Buttondown 71.5
  2. 2 Polygon 71.5
  3. 3 Factset 64.8
  4. 4 Gutendex 45.5
  5. 5 The New York Times 44.5
  6. 6 WorldCat 44.1
  7. 7 ISBNdb 42.7
  8. 8 The New York Times Company 41.7
  9. 9 Google Books 40.1
  10. 10 Zoho 38.5
Top by Agent Readiness
  1. 1 Polygon 57.3
  2. 2 Factset 52.8
  3. 3 Buttondown 41.2
  4. 4 WorldCat 35.6
  5. 5 Gutendex 28.7
  6. 6 Springer Nature 26.9
  7. 7 Zoho 26.8
  8. 8 Next Big Idea Club 26.6
  9. 9 An API of Ice and Fire 25.8
  10. 10 The New York Times Company 25.8
All 65 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 25 August 2026, across 26891 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

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MCP server

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Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools

Call it yourself

curl for this page
This tag 
curl "https://apis.io/api/v1/tags/books"
All tags 
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort 
curl "https://apis.io/api/v1/cohorts/tag/books"
The distribution (Pro) 
curl "https://apis.io/api/v1/cohorts/tag/books/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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