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Danish CVR Registry API Documentation

Welcome to the comprehensive documentation for the Danish Central Business Register (CVR) API. This documentation provides everything you need to integrate with Denmark's official business registry through its Elasticsearch-based REST API.

Official Business Registry

The CVR (Central Virksomhedsregister) contains official information about all businesses registered in Denmark, including companies, sole proprietorships, associations, and production units.

What's Covered

📚 Complete API Reference

  • 2.2M+ Companies (Virksomhed) with full business data
  • 1.7M+ Participants (Deltager) including owners, directors, and board members
  • 2.8M+ Production Units (Produktionsenhed) for branch offices and facilities
  • 200+ documented fields with types, structures, and examples

🔍 Advanced Query Capabilities

  • Complex Elasticsearch queries with boolean logic
  • Fuzzy search for handling typos and variations
  • Nested queries for hierarchical data structures
  • Aggregations for business intelligence and analytics
  • 30+ practical query examples for real-world scenarios

💻 Production-Ready Implementation

  • Code samples in Python, JavaScript, Bash, Java, Go, and PHP
  • Error handling and retry logic patterns
  • Rate limiting and caching strategies
  • Docker and Kubernetes deployment examples
  • Monitoring and testing approaches

Quick Start

Contact the Danish Business Authority to obtain API access:

Email: cvrselvbetjening@erst.dk
Subject: CVR API Access Request

export CVR_USERNAME="your_username"
export CVR_PASSWORD="your_password"

curl -u "$CVR_USERNAME:$CVR_PASSWORD" \
  -X POST "http://distribution.virk.dk/cvr-permanent/virksomhed/_search" \
  -H 'Content-Type: application/json' \
  -d '{"size": 1}'

Data Overview

Index Content Records Use Cases
Virksomhed Companies 2,194,982 Business lookup, compliance, market research
Deltager Participants 1,772,344 Ownership analysis, governance, due diligence
Produktionsenhed Production Units 2,787,126 Location analysis, employment data, operations

Key Features

🎯 Comprehensive Business Data

  • Complete company profiles with historical changes
  • Ownership structures and corporate governance
  • Financial information and company status
  • Address and contact information
  • Industry classifications (NACE codes)

⚡ Powerful Search & Analytics

  • Real-time data access via Elasticsearch
  • Complex queries with multiple criteria
  • Aggregation capabilities for trend analysis
  • Fuzzy matching for user-friendly searches
  • Temporal queries for historical analysis

🛠️ Developer-Friendly

  • RESTful JSON API
  • Comprehensive field documentation
  • Production-ready code examples
  • Error handling best practices
  • Performance optimization guidelines

Getting Started

Choose your path based on your needs:

  • Quick Start Guide

    Get up and running in minutes with basic queries and authentication setup.

    Quick Start

  • API Reference

    Comprehensive reference for all endpoints, data models, and field specifications.

    API Reference

  • Implementation Guide

    Production-ready code samples and best practices for your preferred language.

    Implementation

  • Query Cookbook

    30+ real-world examples for business intelligence and data analysis.

    Query Examples

Recent Updates

Documentation Updates

This documentation is regularly updated based on API testing and user feedback. Last updated: September 2024

  • ✅ Complete field mappings for all three indices
  • ✅ Advanced Elasticsearch query patterns documented
  • ✅ Error handling catalog with solutions
  • ✅ Production deployment examples
  • ✅ Security best practices

Support & Community

This documentation is community-maintained and provides comprehensive coverage of the Danish CVR Registry API. While not officially endorsed by the Danish Business Authority, it's based on extensive testing and real-world usage.