BoekenBase

BoekenBase is a Dutch online catalogue of the books market, offering searchable access to over 2.2 million titles in natural language. Users can create free accounts to manage personal bookshelves and wishlists, browse detailed book information, and discover new reads. The platform provides an API for developers to integrate book data into applications, supporting queries by title, author, ISBN, and more, with comprehensive metadata and multilingual support.

BoekenBase publishes 2 API contracts indexed on the APIs.io network, including API V1 API, and 1 more. Tagged areas include Books, Catalog, Netherlands, and Library.

The BoekenBase catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

BoekenBase’s developer surface includes documentation, API reference, getting-started guide, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

21.4/100 emerging Agent 26/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract

Books Catalog Netherlands Library

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 21.4/100 · emerging

Contract Quality 10.0 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 4.6 / 9

Regulatory Posture 1.6 / 15

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Education & Research regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

9 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 14.3 — up to +17.1 composite points
Contract Quality scores 46.9 — up to +13.3 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/boekenbase-nl/apis.yml: open an issue on github.com/api-evangelist/boekenbase-nl to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

Boekenbase API

Read-only access to the Dutch books catalogue.

Boekenbase API V1 API

Read-only toegang tot de boekenbase: de catalogus van de Nederlandse

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Boekenbase Nl Context

3 classes · 36 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

BoekenBase API Rules

39 rules · 37 errors 1 warnings 1 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

Book

29 properties

JSON SCHEMA

SearchResult

15 properties

JSON SCHEMA

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Boekenbase Nl Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCP

MCP

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Conformance

DataModel

ErrorCatalog

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: boekenbase-nl
name: BoekenBase
description: BoekenBase is a Dutch online catalogue of the books market, offering searchable access to over 2.2 million titles
  in natural language. Users can create free accounts to manage personal bookshelves and wishlists, browse detailed book information,
  and discover new reads. The platform provides an API for developers to integrate book data into applications, supporting
  queries by title, author, ISBN, and more, with comprehensive metadata and multilingual support.
url: https://artifacts.apis.io/boekenbase-nl/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-02 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-11-02'
modified: '2026-11-02'
tags:
- Books
- Catalog
- Netherlands
- Library
tags_raw:
- Books
- Catalog
- Netherlands
- API
- Library
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Spectral
  url: rules/boekenbase-nl-rules.yml
- type: JSONLD
  url: json-ld/boekenbase-nl-context.jsonld
- type: Vocabulary
  url: vocabulary/boekenbase-nl-vocabulary.yml
- type: Conformance
  url: conformance/boekenbase-nl-conformance.yml
- type: DataModel
  url: data-model/boekenbase-nl-data-model.yml
- type: ErrorCatalog
  url: errors/boekenbase-nl-problem-types.yml
- type: LLMsTxt
  url: llms/boekenbase-nl-llms.txt
- type: Hosts
  url: hosts/boekenbase-nl-hosts.yml
- type: Vendors
  url: vendors/boekenbase-nl-vendors.yml
- type: DomainSecurity
  url: security/boekenbase-nl-domain-security.yml
- type: Website
  url: https://boekenbase.nl/
- type: Documentation
  url: https://boekenbase.nl/developers/docs
- type: APIReference
  url: https://boekenbase.nl/developers
- type: GettingStarted
  url: https://boekenbase.nl/developers
- type: MCP
  url: https://boekenbase.nl/mcp
apis:
- name: Boekenbase API
  description: Read-only access to the Dutch books catalogue.
  humanURL: https://boekenbase.nl/developers/docs
  baseURL: https://nhjisqchpvhuelilkoen.supabase.co/functions/v1/api
  aid: boekenbase-nl:boekenbase-api
- aid: boekenbase-nl:boekenbase-api-v1-api
  name: Boekenbase API V1 API
  description: 'Read-only toegang tot de boekenbase: de catalogus van de Nederlandse'
  humanURL: https://boekenbase.nl/developers/docs
  baseURL: https://nhjisqchpvhuelilkoen.supabase.co/functions/v1/api
  properties:
  - type: OpenAPI
    url: openapi/_original/boekenbase-nl-v1-openapi.json
  - type: JSONSchema
    url: json-schema/boekenbase-nl-book-schema.json
  - type: JSONSchema
    url: json-schema/boekenbase-nl-search-result-schema.json
x-enrichment:
  date: '2026-11-02'
  status: enriched
  artifacts_added: 13
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

BoekenBase API — frequently asked questions

Does BoekenBase have an API?

Yes. APIs.io lists 2 APIs from BoekenBase, including Boekenbase API and Boekenbase API V1 API.

Is there an OpenAPI specification for the BoekenBase API?

Yes. APIs.io indexes 1 OpenAPI specification for BoekenBase, each linked for download from this page.

How do I authenticate with the BoekenBase API?

BoekenBase uses bearer-token authentication.

Is the BoekenBase API ready for AI agents?

BoekenBase has a Kin Score of 21.4 out of 100 (emerging) and an Agent Readiness score of 26.2 (agent-aware), scored by API Evangelist on 2026-11-06.

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get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
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