BusinessStandardCC-BY-4.0

YTJ — Finnish companies (PRH Open Data)

Name: YTJ — Finnish companies (PRH Open Data)
License: CC-BY-4.0

Yritys- ja yhteisötietojärjestelmä (YTJ) is the Finnish business register operated by the Finnish Patent and Registration Office (PRH). Provides access to company data, business IDs (Y-tunnus), addresses, industries and registration status for all Finnish companies and organisations.

900K rows

Data volume

Daily

Updates

MCP tools

Example response — /connectors/ytj/search

{
  "data": "..."
}

MCP integration

Available MCP tools

ytj.company_forms.list

ytj.company.lookup

ytj.company.search

Configuration for Claude Desktop / Cursor

{
  "mcpServers": {
    "ytj": {
      "url": "https://data.ketl.no/mcp/ytj",
      "headers": {
        "Authorization": "Bearer $KETL_API_KEY"
      }
    }
  }
}

Analysis apps that use this source

Ready-made tools built on YTJ — Finnish companies (PRH Open Data) data. Use them directly in the browser, or wire the same data into your own analysis via the API below.

Company profile

Cross-referenced company profile in a single lookup — Brreg, GLEIF LEI, OpenCorporates and Wikidata, with Nordic name matches from CVR (DK) and YTJ (FI). KYB, journalism and investor analysis.

Nordic company register

One search across the company registers of Norway, Sweden, Denmark and Finland. Norway and Finland are covered by the national registers (Brreg, YTJ); Sweden and Denmark by GLEIF LEI, since Bolagsverket's and CVR's own APIs require an agreement. Shows which register answered, and retrieves the GLEIF-verified group structure across borders. For a single real-time lookup that also covers Iceland, see the NSG app.

Finnish company search (YTJ)

Search Finland's official business register via the PRH/YTJ Open Data API — find Finnish companies by Business ID (Y-tunnus), company name, legal form and industry.

API endpoints

GET

/search

Paginert sok i PRH/YTJ Open Data (finske selskaper)

name optional: Selskapsnavn (minst ett filter må oppgis) name=Nokia
businessId optional: Finsk foretaks-ID (FO-nummer) businessId=0112038-9
location optional: Sted/kommune location=Helsinki
mainBusinessLine optional: Hovednæringskode (TOL/NACE) mainBusinessLine=62010
companyForm optional: Selskapsform companyForm=OY
registrationDateStart optional: Registrert fra (YYYY-MM-DD) registrationDateStart=2020-01-01
registrationDateEnd optional: Registrert til (YYYY-MM-DD) registrationDateEnd=2024-12-31

Show curl example

# GET https://data.ketl.no/api/connectors/ytj/search
curl \
  -H "Accept: application/json" \
  "https://data.ketl.no/api/connectors/ytj/search"

Authenticated call — add one of these headers: x-api-key: ketl_… · Authorization: Bearer … — See the full reference in the documentation.

GET

/companies

Hent selskapsdata på Y-tunnus

businessId required: Finsk Y-tunnus (business ID), format NNNNNNN-N businessId=0112038-9

Show curl example

# GET https://data.ketl.no/api/connectors/ytj/companies?businessId=0112038-9
curl \
  -H "Accept: application/json" \
  "https://data.ketl.no/api/connectors/ytj/companies?businessId=0112038-9"

Authenticated call — add one of these headers: x-api-key: ketl_… · Authorization: Bearer … — See the full reference in the documentation.

GET

/companies/{businessId}

Hent selskapsdata på Y-tunnus (sti-form)

Show curl example

# GET https://data.ketl.no/api/connectors/ytj/companies/{businessId}
curl \
  -H "Accept: application/json" \
  "https://data.ketl.no/api/connectors/ytj/companies/{businessId}"

Authenticated call — add one of these headers: x-api-key: ketl_… · Authorization: Bearer … — See the full reference in the documentation.

Access and pricing

YTJ — Finnish companies (PRH Open Data) is openly available — create an account to get started.

finlandforetakselskapytunnusnordisk