Kamer van Koophandel (KVK)

Kamer van Koophandel (KVK), the Netherlands Chamber of Commerce, maintains the Dutch Business Register (Handelsregister). Through the KVK Developer Portal it offers paid REST APIs to search the register (Zoeken), retrieve basic company profiles (Basisprofiel), establishment profiles (Vestigingsprofiel) and trade names (Naamgeving), a change-signal subscription (Mutatieservice), plus open datasets, with a free test environment using fictitious data.

Kamer van Koophandel (KVK) publishes 6 API contracts indexed on the APIs.io network, including Abonnement API, Basisprofiel API, Naamgeving API, and 3 more. Tagged areas include Company, Business Register, Government, Netherlands, and Company Data.

The Kamer van Koophandel (KVK) catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Kamer van Koophandel (KVK)’s developer surface includes changelog, sandbox, authentication, documentation, API reference, getting-started guide, pricing, and 25 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

55.7/100 strong Agent 34/100 agent ready Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

10 published contracts

Company Business Register Government Netherlands Company Data KYC Open Data

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 55.7/100 · strong

Contract Quality 12.4 / 21

Developer Ergonomics 10.5 / 17

Access Clarity 9.0 / 17

Operational Transparency 4.2 / 11

Contract Governance 2.2 / 10

Discoverability 6.7 / 9

Regulatory Posture 4.6 / 15

Agent readiness — 34/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 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 4 / 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 Government & Public Sector 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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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 Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks Ask about this →
Agent Skills +5 pts — skills artifact present, graded by who authored it Ask about this →

4 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 58.5 — up to +10.4 composite points Ask about this →
Contract Governance scores 22.0 — up to +9.4 composite points Ask about this →
Access Clarity scores 53.2 — up to +9.4 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/kvk-nl/apis.yml: open an issue on github.com/api-evangelist/kvk-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 6

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

Kamer van Koophandel (KVK) Abonnement API

The Abonnement API from Kamer van Koophandel (KVK) — 2 operation(s) for abonnement.

Kamer van Koophandel (KVK) Basisprofiel API

The Basisprofiel API from Kamer van Koophandel (KVK) — 4 operation(s) for basisprofiel.

Kamer van Koophandel (KVK) Naamgeving API

The naamgeving API from Kamer van Koophandel (KVK) — 1 operation(s) for naamgeving.

Kamer van Koophandel (KVK) Signaal API

The Signaal API from Kamer van Koophandel (KVK) — 1 operation(s) for signaal.

Kamer van Koophandel (KVK) Vestigingsprofiel API

The Vestigingsprofiel API from Kamer van Koophandel (KVK) — 1 operation(s) for vestigingsprofiel.

Kamer van Koophandel (KVK) Zoeken API

The Zoeken API from Kamer van Koophandel (KVK) — 1 operation(s) for zoeken.

Kamer van Koophandel (KVK) API pricing

Prices published by Kamer van Koophandel (KVK).

Plan	Price
API subscription	€ 6.40
Mutatieservice	€ 1,279

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

Kamer van Koophandel (KVK) Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Kamer van Koophandel (KVK) Rate Limits

0 limits

RATE LIMITS

Semantic Vocabularies 1

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

Kvk Nl Context

63 classes · 156 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Kamer van Koophandel (KVK) API Rules

52 rules · 45 error-severity 4 warn-severity 3 info-severity

SPECTRAL

OpenAPI Overlays 2

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Kamer van Koophandel (KVK) Abonnement Api Certification Overlay

1 action · security · kvk-nl-abonnement-api-openapi.yml

DERIVED

Kamer van Koophandel (KVK) Zoeken Api Certification Overlay

1 action · update · kvk-nl-zoeken-api-openapi.yml

DERIVED

JSON Schema 11

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

AbonnementenHalResponseType

2 properties

JSON SCHEMA

AbonnementenResponseType

2 properties

JSON SCHEMA

Basisprofiel

11 properties

JSON SCHEMA

Eigenaar

7 properties

JSON SCHEMA

Naamgeving

9 properties

JSON SCHEMA

PagedSignalenHalType

7 properties

JSON SCHEMA

PagedSignalenType

5 properties

JSON SCHEMA

Resultaat

7 properties

JSON SCHEMA

SignaalResponseType

1 properties

JSON SCHEMA

VestigingList

6 properties

JSON SCHEMA

Vestiging

18 properties

JSON SCHEMA

Scroll for all 11

Security Posture 3

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

Kamer van Koophandel (KVK) Authentication

apiKey · 1 scheme

SECURITY

Kamer van Koophandel (KVK) Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Kamer van Koophandel (KVK) Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

Kamer van Koophandel (KVK) Agentic Access

10 operations

10 operations · 0 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

Sandbox

DeveloperPortal

GettingStarted

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

WellKnown

WellKnown

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conventions

ErrorCatalog

Conformance

Scroll for all 7

Access & Security 5

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Security

Security

Authentication

Authentication

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

StatusPage

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: kvk-nl
name: Kamer van Koophandel (KVK)
description: Kamer van Koophandel (KVK), the Netherlands Chamber of Commerce, maintains the Dutch Business Register (Handelsregister).
  Through the KVK Developer Portal it offers paid REST APIs to search the register (Zoeken), retrieve basic company profiles
  (Basisprofiel), establishment profiles (Vestigingsprofiel) and trade names (Naamgeving), a change-signal subscription (Mutatieservice),
  plus open datasets, with a free test environment using fictitious data.
url: https://artifacts.apis.io/kvk-nl/apis.yml
x-type: company
x-source: harvest:eu-gov-keynote-2026-11-10
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-10 (local-v6; was harvest)
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - security
  - sandbox
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-11-10'
modified: '2026-11-10'
tags:
- Company
- Business Register
- Government
- Netherlands
- Company Data
- KYC
- Open Data
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: SecurityTxt
  url: well-known/kvk-nl-www-security.txt
- type: WellKnown
  url: well-known/kvk-nl-well-known.yml
- type: AgenticAccess
  url: agentic-access/kvk-nl-agentic-access.yml
- type: Plans
  url: plans/kvk-nl-plans-pricing.yml
- type: Spectral
  url: rules/kvk-nl-rules.yml
- type: JSONLD
  url: json-ld/kvk-nl-context.jsonld
- type: Vocabulary
  url: vocabulary/kvk-nl-vocabulary.yml
- type: DataModel
  url: data-model/kvk-nl-data-model.yml
- type: ChangeLog
  url: changelog/kvk-nl-changelog.yml
- type: Conventions
  url: conventions/kvk-nl-conventions.yml
- type: Sandbox
  url: sandbox/kvk-nl-sandbox.yml
- type: Security
  url: https://www.ncsc.nl/dienstverlening/kwetsbaarheid-melden-cvd
- type: ErrorCatalog
  url: errors/kvk-nl-problem-types.yml
- type: Conformance
  url: conformance/kvk-nl-conformance.yml
- type: LLMsTxt
  url: llms/kvk-nl-llms.txt
- type: Hosts
  url: hosts/kvk-nl-hosts.yml
- type: Authentication
  url: authentication/kvk-nl-authentication.yml
- type: Website
  url: https://www.kvk.nl
- type: VulnerabilityDisclosure
  url: security/kvk-nl-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/kvk-nl-domain-security.yml
- type: DeveloperPortal
  url: https://developers.kvk.nl
- type: Documentation
  url: https://developers.kvk.nl/documentation
- type: APIReference
  url: https://developers.kvk.nl/documentation/zoeken-api
- type: GettingStarted
  url: https://developers.kvk.nl/documentation/quickstart
- type: ChangeLog
  url: https://developers.kvk.nl/documentation/release-notes
- type: Pricing
  url: https://developers.kvk.nl/pricing
- type: TermsOfService
  url: https://developers.kvk.nl/terms-of-use
- type: PrivacyPolicy
  url: https://www.kvk.nl/privacy
- type: StatusPage
  url: https://status.kvk.nl
- type: Support
  url: https://developers.kvk.nl/faq
- type: SignUp
  url: https://developers.kvk.nl/apply-for-apis
- type: Login
  url: https://developers.kvk.nl/login
apis:
- aid: kvk-nl:kvk-nl-abonnement-api
  name: Kamer van Koophandel (KVK) Abonnement API
  description: The Abonnement API from Kamer van Koophandel (KVK) — 2 operation(s) for abonnement.
  humanURL: https://developers.kvk.nl/documentation/zoeken-api
  baseURL: https://api.kvk.nl/api
  tags:
  - Abonnement
  properties:
  - type: OpenAPI
    url: openapi/kvk-nl-abonnement-api-openapi.yml
  - type: Documentation
    url: https://developers.kvk.nl/documentation/zoeken-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/basisprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/vestigingsprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/naamgeving-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/mutatieservice-api
  - type: JSONSchema
    url: json-schema/kvk-nl-paged-signalen-hal-type-schema.json
  - type: JSONSchema
    url: json-schema/kvk-nl-abonnementen-hal-response-type-schema.json
  - type: JSONSchema
    url: json-schema/kvk-nl-abonnementen-response-type-schema.json
  - type: JSONSchema
    url: json-schema/kvk-nl-paged-signalen-type-schema.json
- aid: kvk-nl:kvk-nl-basisprofiel-api
  name: Kamer van Koophandel (KVK) Basisprofiel API
  description: The Basisprofiel API from Kamer van Koophandel (KVK) — 4 operation(s) for basisprofiel.
  humanURL: https://developers.kvk.nl/documentation/zoeken-api
  baseURL: https://api.kvk.nl/api/v1
  tags:
  - Basisprofiel
  properties:
  - type: OpenAPI
    url: openapi/kvk-nl-basisprofiel-api-openapi.yml
  - type: Documentation
    url: https://developers.kvk.nl/documentation/zoeken-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/basisprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/vestigingsprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/naamgeving-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/mutatieservice-api
  - type: JSONSchema
    url: json-schema/kvk-nl-vestiging-schema.json
  - type: JSONSchema
    url: json-schema/kvk-nl-basisprofiel-schema.json
  - type: JSONSchema
    url: json-schema/kvk-nl-eigenaar-schema.json
  - type: JSONSchema
    url: json-schema/kvk-nl-vestiging-list-schema.json
- aid: kvk-nl:kvk-nl-naamgeving-api
  name: Kamer van Koophandel (KVK) Naamgeving API
  description: The naamgeving API from Kamer van Koophandel (KVK) — 1 operation(s) for naamgeving.
  humanURL: https://developers.kvk.nl/documentation/zoeken-api
  baseURL: https://api.kvk.nl/api/v1
  tags:
  - naamgeving
  properties:
  - type: OpenAPI
    url: openapi/kvk-nl-naamgeving-api-openapi.yml
  - type: Documentation
    url: https://developers.kvk.nl/documentation/zoeken-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/basisprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/vestigingsprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/naamgeving-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/mutatieservice-api
  - type: JSONSchema
    url: json-schema/kvk-nl-vestiging-schema.json
  - type: JSONSchema
    url: json-schema/kvk-nl-naamgeving-schema.json
- aid: kvk-nl:kvk-nl-signaal-api
  name: Kamer van Koophandel (KVK) Signaal API
  description: The Signaal API from Kamer van Koophandel (KVK) — 1 operation(s) for signaal.
  humanURL: https://developers.kvk.nl/documentation/zoeken-api
  baseURL: https://api.kvk.nl/api
  tags:
  - Signaal
  properties:
  - type: OpenAPI
    url: openapi/kvk-nl-signaal-api-openapi.yml
  - type: Documentation
    url: https://developers.kvk.nl/documentation/zoeken-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/basisprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/vestigingsprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/naamgeving-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/mutatieservice-api
  - type: JSONSchema
    url: json-schema/kvk-nl-signaal-response-type-schema.json
- aid: kvk-nl:kvk-nl-vestigingsprofiel-api
  name: Kamer van Koophandel (KVK) Vestigingsprofiel API
  description: The Vestigingsprofiel API from Kamer van Koophandel (KVK) — 1 operation(s) for vestigingsprofiel.
  humanURL: https://developers.kvk.nl/documentation/zoeken-api
  baseURL: https://api.kvk.nl/api/v1
  tags:
  - Vestigingsprofiel
  properties:
  - type: OpenAPI
    url: openapi/kvk-nl-vestigingsprofiel-api-openapi.yml
  - type: Documentation
    url: https://developers.kvk.nl/documentation/zoeken-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/basisprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/vestigingsprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/naamgeving-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/mutatieservice-api
  - type: JSONSchema
    url: json-schema/kvk-nl-vestiging-schema.json
- aid: kvk-nl:kvk-nl-zoeken-api
  name: Kamer van Koophandel (KVK) Zoeken API
  description: The Zoeken API from Kamer van Koophandel (KVK) — 1 operation(s) for zoeken.
  humanURL: https://developers.kvk.nl/documentation/zoeken-api
  baseURL: https://api.kvk.nl/api/v2
  tags:
  - Zoeken
  properties:
  - type: OpenAPI
    url: openapi/kvk-nl-zoeken-api-openapi.yml
  - type: Documentation
    url: https://developers.kvk.nl/documentation/zoeken-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/basisprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/vestigingsprofiel-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/naamgeving-api
  - type: Documentation
    url: https://developers.kvk.nl/documentation/mutatieservice-api
  - type: JSONSchema
    url: json-schema/kvk-nl-resultaat-schema.json
x-enrichment:
  date: '2026-11-10'
  status: enriched
  artifacts_added: 47
  pass: local-v6

Kamer van Koophandel (KVK) API — frequently asked questions

Does Kamer van Koophandel (KVK) have an API?

Yes. APIs.io lists 6 APIs from Kamer van Koophandel (KVK), including Kamer van Koophandel (KVK) Abonnement API, Kamer van Koophandel (KVK) Basisprofiel API and Kamer van Koophandel (KVK) Naamgeving API, and 3 more.

Is there an OpenAPI specification for the Kamer van Koophandel (KVK) API?

Yes. APIs.io indexes 6 OpenAPI specifications for Kamer van Koophandel (KVK), each linked for download from this page.

How do I authenticate with the Kamer van Koophandel (KVK) API?

Kamer van Koophandel (KVK) uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Kamer van Koophandel (KVK) Authentication.

How much does the Kamer van Koophandel (KVK) API cost?

Kamer van Koophandel (KVK) publishes its prices; its API subscription plan is € 6.40 as of 2026-11-10. APIs.io lists 2 pricing plans for Kamer van Koophandel (KVK), with each plan's price, limits and inclusions under Pricing on this page.

Is the Kamer van Koophandel (KVK) API ready for AI agents?

Kamer van Koophandel (KVK) has a Kin Score of 55.7 out of 100 (strong) and an Agent Readiness score of 34.1 (agent-ready), scored by API Evangelist on 2026-11-13.

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