PRH Open Data (Finland)

The Finnish Patent and Registration Office (Patentti- ja rekisterihallitus, PRH) publishes free open data APIs at avoindata.prh.fi covering the Finnish Business Information System (YTJ) company register, notifications registered at the Finnish Trade Register since 7 November 2014, and digital (iXBRL) financial statements. Data are JSON over HTTPS, updated once a day, need no key, and are licensed CC BY 4.0.

PRH Open Data (Finland) publishes 10 API contracts indexed on the APIs.io network, including All Companies API, All Financial Statements API, All Financials API, and 7 more. Tagged areas include Company, Government, Finland, Business Registry, and Open Data.

The PRH Open Data (Finland) catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

PRH Open Data (Finland)’s developer surface includes documentation, support, and 16 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

32.8/100 thin Agent 25/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFree

3 published contracts 1 Agent Skills

Company Government Finland Business Registry Open Data Financial Statements XBRL

Kin Score

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

Composite quality — 32.8/100 · thin

Contract Quality 11.4 / 21

Developer Ergonomics 4.4 / 17

Access Clarity 4.3 / 17

Operational Transparency 0.0 / 11

Contract Governance 2.2 / 10

Discoverability 6.1 / 9

Regulatory Posture 1.3 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 0 / 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 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 Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
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) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

9 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 25.6 — up to +14.9 composite points Ask about this →
Access Clarity scores 25.5 — up to +14.9 composite points Ask about this →
Operational Transparency scores 0.0 — up to +13.0 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/avoindata-prh-fi/apis.yml: open an issue on github.com/api-evangelist/avoindata-prh-fi 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 10

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

PRH Open Data (Finland) All Companies API

The All Companies API from PRH Open Data (Finland) — 1 operation(s) for all companies.

PRH Open Data (Finland) All Financial Statements API

The All Financial Statements API from PRH Open Data (Finland) — 1 operation(s) for all financial statements.

PRH Open Data (Finland) All Financials API

The All Financials API from PRH Open Data (Finland) — 1 operation(s) for all financials.

PRH Open Data (Finland) Companies API

The Companies API from PRH Open Data (Finland) — 1 operation(s) for companies.

PRH Open Data (Finland) Description API

The Description API from PRH Open Data (Finland) — 1 operation(s) for description.

PRH Open Data (Finland) Financial API

The Financial API from PRH Open Data (Finland) — 1 operation(s) for financial.

PRH Open Data (Finland) Financials API

The Financials API from PRH Open Data (Finland) — 1 operation(s) for financials.

PRH Open Data (Finland) Opendata Registered Notices API

The Opendata Registered Notices Api API from PRH Open Data (Finland) — 2 operation(s) for opendata registered notices api.

PRH Open Data (Finland) Post Codes API

The Post Codes API from PRH Open Data (Finland) — 1 operation(s) for post codes.

PRH Open Data (Finland) Publicnotices API

The Publicnotices API from PRH Open Data (Finland) — 1 operation(s) for publicnotices.

Scroll for all 10

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

lookup-finnish-company

AGENT SKILL

PRH Open Data (Finland) API pricing

Prices published by PRH Open Data (Finland).

Plan	Price
Open data (free)	The data from the PRH open data service are digital and available free of charge.

Plan details, limits and sources →

Pricing Plans 1

Published pricing tiers and plan structures.

PRH Open Data (Finland) Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

PRH Open Data (Finland) Rate Limits

0 limits

RATE LIMITS

Semantic Vocabularies 1

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

Avoindata Prh Fi Context

16 classes · 49 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.

PRH Open Data (Finland) API Rules

41 rules · 36 error-severity 4 warn-severity 1 info-severity

SPECTRAL

JSON Schema 5

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

CompanyPublicNotice

6 properties

JSON SCHEMA

CompanyResult

2 properties

JSON SCHEMA

Company

15 properties

JSON SCHEMA

FinancialResult

2 properties

JSON SCHEMA

PostOfficeEntry

5 properties

JSON SCHEMA

Security Posture 1

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

PRH Open Data (Finland) Domain Security

TLSv1.2 · HSTS · DNSSEC · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

PRH Open Data (Finland) Agentic Access

12 operations

12 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

AgenticAccess

AgenticAccess

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conventions

ErrorCatalog

Conformance

Scroll for all 7

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

PrivacyPolicy

PrivacyPolicy

License

License

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: avoindata-prh-fi
name: PRH Open Data (Finland)
description: The Finnish Patent and Registration Office (Patentti- ja rekisterihallitus, PRH) publishes free open data APIs
  at avoindata.prh.fi covering the Finnish Business Information System (YTJ) company register, notifications registered at
  the Finnish Trade Register since 7 November 2014, and digital (iXBRL) financial statements. Data are JSON over HTTPS, updated
  once a day, need no key, and are licensed CC BY 4.0.
url: https://artifacts.apis.io/avoindata-prh-fi/apis.yml
x-type: company
x-source: harvest:eu-gov-keynote-2026-11-10
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-11 (local-v6; was harvest)
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
specificationVersion: '0.20'
created: '2026-11-11'
modified: '2026-11-11'
tags:
- Company
- Government
- Finland
- Business Registry
- Open Data
- Financial Statements
- XBRL
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://avoindata.prh.fi/favicon.ico
common:
- type: AgentSkill
  url: skills/_index.yml
- type: AgenticAccess
  url: agentic-access/avoindata-prh-fi-agentic-access.yml
- type: Plans
  url: plans/avoindata-prh-fi-plans-pricing.yml
- type: Spectral
  url: rules/avoindata-prh-fi-rules.yml
- type: JSONLD
  url: json-ld/avoindata-prh-fi-context.jsonld
- type: Vocabulary
  url: vocabulary/avoindata-prh-fi-vocabulary.yml
- type: DataModel
  url: data-model/avoindata-prh-fi-data-model.yml
- type: Conventions
  url: conventions/avoindata-prh-fi-conventions.yml
- type: ErrorCatalog
  url: errors/avoindata-prh-fi-problem-types.yml
- type: Conformance
  url: conformance/avoindata-prh-fi-conformance.yml
- type: Hosts
  url: hosts/avoindata-prh-fi-hosts.yml
- type: Website
  url: https://avoindata.prh.fi
- type: DomainSecurity
  url: security/avoindata-prh-fi-domain-security.yml
- type: Documentation
  url: https://avoindata.prh.fi/en/info/swagger-ui
- type: DeveloperPortal
  url: https://avoindata.prh.fi/en
- type: PrivacyPolicy
  url: https://ytj.fi/index/rekisteriselosteet.html
- type: License
  url: https://creativecommons.org/licenses/by/4.0/
- type: Support
  url: mailto:avoindata@prh.fi
apis:
- aid: avoindata-prh-fi:avoindata-prh-fi-all-companies-api
  name: PRH Open Data (Finland) All Companies API
  description: The All Companies API from PRH Open Data (Finland) — 1 operation(s) for all companies.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-ytj-api/v3
  tags:
  - All Companies
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-all-companies-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
- aid: avoindata-prh-fi:avoindata-prh-fi-all-financial-statements-api
  name: PRH Open Data (Finland) All Financial Statements API
  description: The All Financial Statements API from PRH Open Data (Finland) — 1 operation(s) for all financial statements.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-xbrl-api/v3
  tags:
  - All Financial Statements
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-all-financial-statements-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-financial-result-schema.json
- aid: avoindata-prh-fi:avoindata-prh-fi-all-financials-api
  name: PRH Open Data (Finland) All Financials API
  description: The All Financials API from PRH Open Data (Finland) — 1 operation(s) for all financials.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-xbrl-api/v3
  tags:
  - All Financials
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-all-financials-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-financial-result-schema.json
- aid: avoindata-prh-fi:avoindata-prh-fi-companies-api
  name: PRH Open Data (Finland) Companies API
  description: The Companies API from PRH Open Data (Finland) — 1 operation(s) for companies.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-ytj-api/v3
  tags:
  - Companies
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-companies-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-company-result-schema.json
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-company-schema.json
- aid: avoindata-prh-fi:avoindata-prh-fi-description-api
  name: PRH Open Data (Finland) Description API
  description: The Description API from PRH Open Data (Finland) — 1 operation(s) for description.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-registerednotices-api/v3
  tags:
  - Description
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-description-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
- aid: avoindata-prh-fi:avoindata-prh-fi-financial-api
  name: PRH Open Data (Finland) Financial API
  description: The Financial API from PRH Open Data (Finland) — 1 operation(s) for financial.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-xbrl-api/v3
  tags:
  - Finance
  tags_raw:
  - Financial
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-financial-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
- aid: avoindata-prh-fi:avoindata-prh-fi-financials-api
  name: PRH Open Data (Finland) Financials API
  description: The Financials API from PRH Open Data (Finland) — 1 operation(s) for financials.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-xbrl-api/v3
  tags:
  - Finance
  tags_raw:
  - Financials
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-financials-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-financial-result-schema.json
- aid: avoindata-prh-fi:avoindata-prh-fi-opendata-registered-notices-api-api
  name: PRH Open Data (Finland) Opendata Registered Notices API
  description: The Opendata Registered Notices Api API from PRH Open Data (Finland) — 2 operation(s) for opendata registered
    notices api.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-registerednotices-api/v3
  tags:
  - Opendata Registered Notices Api
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-opendata-registered-notices-api-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-company-result-schema.json
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-company-schema.json
- aid: avoindata-prh-fi:avoindata-prh-fi-post-codes-api
  name: PRH Open Data (Finland) Post Codes API
  description: The Post Codes API from PRH Open Data (Finland) — 1 operation(s) for post codes.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-ytj-api/v3
  tags:
  - Postcodes
  tags_raw:
  - Post Codes
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-post-codes-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-post-office-entry-schema.json
- aid: avoindata-prh-fi:avoindata-prh-fi-publicnotices-api
  name: PRH Open Data (Finland) Publicnotices API
  description: The Publicnotices API from PRH Open Data (Finland) — 1 operation(s) for publicnotices.
  humanURL: https://avoindata.prh.fi/en/ytj/swagger-ui
  baseURL: https://avoindata.prh.fi/opendata-registerednotices-api/v3
  tags:
  - PublicNotices
  tags_raw:
  - Publicnotices
  properties:
  - type: OpenAPI
    url: openapi/avoindata-prh-fi-publicnotices-api-openapi.yml
  - type: Documentation
    url: https://avoindata.prh.fi/en/ytj/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/krek/swagger-ui
  - type: Documentation
    url: https://avoindata.prh.fi/en/xbrl/swagger-ui
  - type: JSONSchema
    url: json-schema/avoindata-prh-fi-company-public-notice-schema.json
x-enrichment:
  date: '2026-11-11'
  status: enriched
  artifacts_added: 20
  pass: local-v6

PRH Open Data (Finland) API — frequently asked questions

Does PRH Open Data (Finland) have an API?

Yes. APIs.io lists 10 APIs from PRH Open Data (Finland), including PRH Open Data (Finland) All Companies API, PRH Open Data (Finland) All Financial Statements API and PRH Open Data (Finland) All Financials API, and 7 more.

Is there an OpenAPI specification for the PRH Open Data (Finland) API?

Yes. APIs.io indexes 10 OpenAPI specifications for PRH Open Data (Finland), each linked for download from this page.

How much does the PRH Open Data (Finland) API cost?

PRH Open Data (Finland) publishes its prices; its Open data (free) plan is The data from the PRH open data service are digital and available free of charge. as of 2026-11-11. APIs.io lists 1 pricing plan for PRH Open Data (Finland), with each plan's price, limits and inclusions under Pricing on this page.

Is the PRH Open Data (Finland) API ready for AI agents?

PRH Open Data (Finland) has a Kin Score of 32.8 out of 100 (thin) and an Agent Readiness score of 24.7 (agent-aware), scored by API Evangelist on 2026-11-13.

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