Provides access to Brønnøysundregistrene (Brreg), the Norwegian Business Registry, enabling search and retrieval of company information, subunits, roles, organization forms, municipalities, NACE industry codes, and tracking updates for Norwegian businesses.
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Brreg MCP Server search for companies named 'Norsk Hydro' in Oslo"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
A Model Context Protocol (MCP) server for interacting with Brønnøysundregistrene (Brreg) API - Norwegian Business Registry.
Company Search: Search for companies with various filters
Company Details: Get detailed information about specific companies
Company Roles: Retrieve roles and board members
Subunit Search: Search for business units/subunits
Subunit Details: Get detailed information about specific subunits
Organization Forms: Get organization forms and their descriptions
Municipalities: Get Norwegian municipalities and their details
Role Information: Get role types, role group types, and representatives
Updates Tracking: Get updates for companies and subunits
NACE Codes: Search and filter by NACE industry codes with hierarchical support
Error Handling: Comprehensive error handling with validation
Type Safety: Full TypeScript support with proper type definitions
Related MCP server: CompanyIQ MCP Server
# Install globally
npm install -g brreg-mcp-server
# Or install locally in your project
npm install brreg-mcp-server# Clone repository
git clone https://github.com/david/brreg-mcp-server.git
cd brreg-mcp-server
# Install dependencies
npm install
# Build project
npm run build
# Start server
npm start# Run in development mode
npm run devsearch_companiesSearch for companies in Norwegian Business Registry.
Parameters:
name (string): Company name (free text, 1-180 characters)
organizationNumber (array): Organization numbers (9 digits each)
parentCompany (string): Parent company organization number
fromEmployees (number): Minimum number of employees
toEmployees (number): Maximum number of employees
bankrupt (boolean): Filter by bankruptcy status
registeredInVAT (boolean): Filter by VAT registration
registeredInBusinessRegister (boolean): Filter by business register status
organizationForm (array): Organization forms (e.g., AS, ENK)
municipalityNumber (array): Municipality numbers (4 digits each)
industryCode (array): Industry codes (e.g., 41.109, 01.1)
page (number): Page number (default: 1)
size (number): Page size (default: 20)
sort (string): Sort field and order (e.g., antallAnsatte,ASC)
get_companyGet detailed information about a specific company.
Parameters:
organizationNumber (string, required): Organization number (9 digits)
get_company_rolesGet all roles for a specific company.
Parameters:
organizationNumber (string, required): Organization number (9 digits)
search_subunitsSearch for business units/subunits.
Parameters:
name (string): Subunit name
organizationNumber (array): Organization numbers
parentCompany (string): Parent company
fromEmployees (number): Minimum employees
toEmployees (number): Maximum employees
registeredInVAT (boolean): VAT registration status
page (number): Page number
size (number): Page size
get_subunitGet detailed information about a specific subunit.
Parameters:
organizationNumber (string, required): Organization number (9 digits)
get_organization_formsGet all organization forms.
Parameters:
page (number): Page number (default: 1)
size (number): Page size (default: 20)
sort (string): Sort field and order (e.g., kode,ASC)
get_organization_forms_for_unitsGet organization forms for main units.
Parameters:
page (number): Page number (default: 1)
size (number): Page size (default: 20)
sort (string): Sort field and order (e.g., kode,ASC)
get_organization_forms_for_subunitsGet organization forms for subunits.
Parameters:
page (number): Page number (default: 1)
size (number): Page size (default: 20)
sort (string): Sort field and order (e.g., kode,ASC)
get_organization_formGet specific organization form by code.
Parameters:
organizationCode (string, required): Organization form code (e.g., AS, ENK, ASA)
get_municipalitiesGet all Norwegian municipalities.
Parameters:
page (number): Page number (default: 1)
size (number): Page size (default: 20)
sort (string): Sort field and order (e.g., navn,ASC)
get_municipalityGet specific municipality by municipality number.
Parameters:
municipalityNumber (string, required): Municipality number (4 digits)
get_role_typesGet all role types.
get_role_group_typesGet all role group types.
get_role_representativesGet all role representatives.
get_company_updatesGet updates for companies with optional filters.
Parameters:
date (string): Show updates from and including this timestamp (ISO-8601)
updatedBefore (string): Show updates to and including this timestamp (ISO-8601)
updateId (number): Show only updates from and including update ID (>= 1)
organizationNumber (array): Comma-separated list of organization numbers
includeChanges (boolean): Include the changes that caused the update to be published
page (number): Page number (default: 1)
size (number): Page size (default: 20, max: 10000)
sort (string): Sort field and order (e.g., id,ASC). Only id is supported
get_subunit_updatesGet updates for subunits with optional filters.
Parameters:
date (string): Show updates from and including this timestamp (ISO-8601)
updatedBefore (string): Show updates to and including this timestamp (ISO-8601)
updateId (number): Show only updates from and including update ID (>= 1)
organizationNumber (array): Comma-separated list of organization numbers
includeChanges (boolean): Include the changes that caused the update to be published
page (number): Page number (default: 1)
size (number): Page size (default: 20, max: 10000)
sort (string): Sort field and order (e.g., id,ASC). Only id is supported
search_nace_codesSearch NACE industry codes with hierarchical filtering support using the full SN2025 classification.
Parameters:
searchText (string): Text to search for in NACE code names, short names, codes, or notes
parentCode (string): Get all child codes for a specific NACE parent code (e.g., "01.1" will return all subcategories)
exactCode (string): Get specific NACE code by exact code
level (string): Filter by NACE level (1-5). Level 1 = sections, Level 2 = divisions, Level 3 = groups, Level 4 = classes, Level 5 = national subcategories
includeHierarchy (boolean): Include full hierarchical path in results (default: true)
includeNotes (boolean): Include detailed notes in results (default: false)
get_servicesGet all available services from Brreg API.
{
"name": "search_companies",
"arguments": {
"industryCode": ["62"],
"municipalityNumber": ["0301"],
"fromEmployees": 10,
"size": 50
}
}{
"name": "get_company",
"arguments": {
"organizationNumber": "123456789"
}
}{
"name": "get_subunit",
"arguments": {
"organizationNumber": "987654321"
}
}{
"name": "get_organization_forms",
"arguments": {
"page": 1,
"size": 50
}
}{
"name": "get_organization_form",
"arguments": {
"organizationCode": "AS"
}
}{
"name": "get_municipalities",
"arguments": {
"page": 1,
"size": 20,
"sort": "navn,ASC"
}
}{
"name": "get_company_updates",
"arguments": {
"date": "2024-01-01T00:00:00.000Z",
"size": 50,
"includeChanges": true
}
}{
"name": "search_nace_codes",
"arguments": {
"searchText": "software",
"level": "4",
"includeHierarchy": true
}
}{
"name": "search_nace_codes",
"arguments": {
"parentCode": "62",
"includeNotes": true
}
}Add this to your claude_desktop_config.json:
{
"mcpServers": {
"brreg": {
"command": "npx",
"args": ["brreg-mcp-server"]
}
}
}Or if installed globally:
{
"mcpServers": {
"brreg": {
"command": "brreg-mcp-server"
}
}
}The server provides comprehensive error handling:
Validation Errors: Invalid input parameters
Not Found Errors: Company or resource not found
Rate Limit Errors: API rate limits exceeded
Server Errors: Temporary server issues
Network Errors: Connection problems
The server provides proper TypeScript types for:
Company information
Subunit data
Role information
API responses
Error responses
MIT License
Fork the repository
Create a feature branch
Make your changes
Add tests
Submit a pull request
For issues related to the Brreg API itself, visit Brreg's documentation.
For issues with this MCP server, please create an issue in the repository.
Get detailed information about a specific company by organization number
Inputs: organizationNumber (required).
Get all roles for a specific company
Inputs: organizationNumber (required).
Get updates for companies with optional filters
Inputs: date, page, size, sort, +4 more.
Get all municipalities
Inputs: page, size, sort.
Get specific municipality by municipality number
Inputs: municipalityNumber (required).
Get specific organization form by code
Inputs: organizationCode (required).
Get all organization forms
Inputs: page, size, sort.
Get organization forms for subunits
Inputs: page, size, sort.
Get organization forms for main units
Inputs: page, size, sort.
Get all role group types
Inputs: no named parameters.
Get all role representatives
Inputs: no named parameters.
Get all role types
Inputs: no named parameters.
Get all available services from the Brreg API
Inputs: no named parameters.
Get detailed information about a specific subunit by organization number
Inputs: organizationNumber (required).
Get updates for subunits with optional filters
Inputs: date, page, size, sort, +4 more.
Search for companies in the Norwegian Business Registry with various filters
Inputs: name, page, size, sort, +11 more.
Search NACE industry codes with hierarchical filtering support using the full SN2025 classification
Inputs: level, exactCode, parentCode, searchText, +2 more.
Search for subunits (business units) in the Norwegian Business Registry
Inputs: name, page, size, toEmployees, +4 more.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Scored across 18 tools
Most tools are clearly distinct, targeting different resources (companies, subunits, municipalities, roles, organization forms, NACE codes) or actions (search vs. get). However, the multiple organization-form tools (get_organization_forms, get_organization_forms_for_units, get_organization_forms_for_subunits, get_organization_form) could be slightly confusing, though their descriptions clarify the different scopes.
All tool names follow a consistent verb_noun pattern in snake_case, using 'get_' for single resource retrieval and 'search_' for query operations. There are no mixed conventions or vague verbs, making the naming highly predictable.
With 18 tools, the server is slightly on the higher end of the ideal range, but each tool serves a distinct purpose within the Norwegian Business Registry domain. The count feels justified given the variety of reference data (municipalities, organization forms, roles) and core entities (companies, subunits, updates).
The tool surface covers the main read-only workflows for the Brreg API: retrieving companies, subunits, roles, updates, and reference data. Minor gaps exist, such as no direct endpoint for listing a company's subunits, but these can be worked around with search_subunits. The inclusion of reference data and services makes the set fairly comprehensive.
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