Nordic Registry MCP Server
What is this?
Verify company legitimacy across Norway, Denmark, Finland, and Sweden in seconds. Check bankruptcy status, board members, signing authority, and financial data from official registries, without switching between four government websites.
23 tools wrapping the public APIs of Brønnøysundregistrene, CVR, PRH, and Bolagsverket. Works with Claude Desktop, Claude Code, Cursor, and any MCP client.
What it does:
- Search companies by name across four Nordic countries
- Get company details: status, employees, industry, addresses
- Look up board members, CEOs, auditors, and roles
- Check who can legally sign on behalf of a company
- Access Swedish annual reports (årsredovisningar)
- Batch lookups for validating lists of company IDs
What it doesn't do:
- Modify registry data (read-only)
- Store or cache personal data beyond the session
- Require payment (all underlying APIs are free)
Supported Countries
| Country | Registry | Tools | ID Format |
|---|---|---|---|
| Norway | Brønnøysundregistrene | 12 | 9 digits (e.g., 923609016 or 923 609 016) |
| Denmark | CVR | 5 | 8 digits (e.g., 10150817 or DK-10150817) |
| Finland | PRH | 2 | 7+1 digits (e.g., 0112038-9) |
| Sweden | Bolagsverket | 4 | 10 digits (e.g., 5560125790 or 556012-5790) |
All APIs are free. Norway, Denmark, and Finland require no authentication. Sweden uses the värdefulla datamängder API which requires OAuth2 credentials (free registration).
What Can You Do?
Once connected, just ask your AI:
| You say... | What happens |
|---|---|
| "Find Norwegian companies named Equinor" | Searches Brønnøysundregistrene |
| "Get details for org number 923609016" | Returns full company info |
| "Who is on the board of 923609016?" | Lists board members, CEO, roles |
| "Find Danish company Novo Nordisk" | Searches CVR registry |
| "Look up Finnish company Nokia" | Searches PRH registry |
| "Get company 0112038-9 from Finland" | Returns Nokia's full details |
| "Get Swedish company 5560125790" | Returns company info from Bolagsverket |
| "List annual reports for Swedish company X" | Lists available årsredovisningar |
Use Cases
Case Processing: Verify Applicant Companies
When processing permit applications, license renewals, or grant requests, verify the applying company exists and is in good standing.
You: "A company applied for an environmental permit. Org number 923609016.
Check if they're active and who can sign on their behalf."
AI: Let me verify the company and check signing authority.
→ norway_get_company("923609016")
→ norway_get_signature_rights("923609016")
Result: Equinor ASA - Active since 1972, registered for VAT, 21,200 employees.
Authorized signatories: [Name 1] (CEO), [Name 2] + [Name 3] (joint signature).
The application signature matches an authorized signatory.
Procurement: Validate Vendors Before Contract Award
Before awarding a municipal contract, verify that bidding companies are legitimate and not bankrupt.
You: "We received bids from three Danish companies for the IT contract.
CVR numbers: 10150817, 25063783, 37553472. Are they all legitimate?"
AI: I'll verify each company's status.
→ denmark_get_company("10150817")
→ denmark_get_company("25063783")
→ denmark_get_company("37553472")
Result:
- 10150817: Novo Nordisk A/S - Active, 47,000+ employees ✓
- 25063783: Mærsk A/S - Active, established company ✓
- 37553472: [Company name] - BANKRUPT ✗
Recommendation: Exclude 37553472 from consideration.
Grant Administration: Verify Non-Profit Status
When processing grant applications from voluntary organizations, verify their registration in Frivillighetsregisteret.
You: "An organization applied for cultural funding.
They claim to be a registered non-profit. Org number 971274808."
AI: Let me check their voluntary organization status.
→ norway_get_company("971274808")
Result: Norges Røde Kors - Registered in Frivillighetsregisteret since 2009.
Organization form: FLI (Forening/lag/innretning).
Activity: Humanitarian aid and emergency response.
Confirmed as eligible non-profit organization.
Regulatory Oversight: Monitor Industry Changes
Track new company registrations or status changes in regulated sectors.
You: "I need to monitor new companies in the financial sector.
What relevant registrations happened this week?"
AI: Let me check recent registry updates.
→ norway_get_updates(since="2024-01-08T00:00:00Z", size=100)
Result: 12 new registrations in financial services sector:
- 3 new AS companies (aksjeselskap)
- 2 new NUF branches of foreign financial institutions
- 7 updates to existing financial companies
[List with org numbers for follow-up]
Cross-Border Coordination: Track Multinational Presence
When coordinating with other Nordic authorities, identify a company's presence across jurisdictions.
You: "We're investigating a company that may operate across Nordic countries.
Check if Volvo has registered entities in Norway and Denmark."
AI: Let me search both registries.
→ norway_search_companies("Volvo")
→ denmark_search_companies("Volvo")
Result: Found registered entities:
- Norway: Volvo Norge AS (org 923609016) - 450 employees, automotive
- Denmark: Volvo Danmark A/S (CVR 12345678) - 320 employees
Both are subsidiaries of Swedish parent company.
Data Quality: Validate Registry Submissions
When receiving bulk data submissions referencing company identifiers, validate them against official registries.
You: "A ministry submitted a list of 50 org numbers for a new subsidy program.
Validate which ones are current and active."
AI: I'll validate them against Brønnøysundregistrene.
→ norway_batch_get_companies([list of 50 org numbers])
Result:
- 47 companies: Active and valid ✓
- 2 companies: Marked as bankrupt - may need review
- 1 org number: Not found in registry - possibly incorrect
Flagged entries exported for manual review.
Statistics: Company Demographics by Municipality
Support policy analysis by examining business composition in specific areas.
You: "How many AS companies are registered in Oslo municipality?"
AI: Let me search with municipality filter.
→ norway_search_companies(query="*", org_form="AS", municipality="0301")
Result: Found 45,231 AS companies registered in Oslo (municipality 0301).
Paginated results available for detailed analysis.
Due Diligence: Verify Board Composition
Before approving state aid or contracts above threshold, verify company governance.
You: "Check the board composition of company 914778271.
We need this for the state aid application review."
AI: Let me retrieve their roles.
→ norway_get_company("914778271")
→ norway_get_roles("914778271")
Result: [Company name] - AS registered 2015
Board members:
- [Name 1] - Styreleder (Chair)
- [Name 2] - Styremedlem
- [Name 3] - Styremedlem
- [Name 4] - Daglig leder (CEO)
Auditor: [Audit firm name]
Document Retrieval: Access Swedish Annual Reports
When reviewing Swedish companies for cross-border matters, check available financial documentation.
You: "A Swedish company applied for recognition in Norway.
What financial reports are available for org 5560125790?"
AI: Let me check Bolagsverket for filed documents.
→ sweden_get_company("5560125790")
→ sweden_get_document_list("5560125790")
Result: [Company name] - Active Swedish AB
Available årsredovisningar: 8 annual reports (2016-2023)
Most recent: Financial year ending 2023-06-30, filed 2023-08-15.
Quick Start
Option 1: Download Binary
Go to Releases and download for your platform.
Option 2: Build from Source
git clone https://github.com/olgasafonova/nordic-registry-mcp-server.git
cd nordic-registry-mcp-server
go build .
Requires Go 1.24+
Setup
Cursor Marketplace
/add-plugin nordic-registry
Claude Code CLI
claude mcp add nordic-registry ./nordic-registry-mcp-server
Claude Desktop
Add to ~/Library/Application Support/Claude/claude_desktop_config.json:
{
"mcpServers": {
"nordic-registry": {
"command": "/path/to/nordic-registry-mcp-server"
}
}
}
Restart Claude Desktop after changes.
Not working? Tell us what made it hard — even one sentence helps.
All Tools
Norway (Brønnøysundregistrene)
| Tool | Description |
|---|---|
norway_search_companies | Search companies by name |
norway_get_company | Get company details by org number |
norway_get_roles | Get board members, CEO, auditors |
norway_get_signature_rights | Get signature rights and prokura |
norway_batch_get_companies | Look up multiple companies at once |
norway_get_subunits | List branch offices for a company |
norway_get_subunit | Get specific branch office details |
norway_search_subunits | Search branch offices by name |
norway_get_updates | Get recent registry changes |
norway_get_subunit_updates | Get recent branch office changes |
norway_list_municipalities | List municipality codes |
norway_list_org_forms | List organization form codes (AS, ENK, etc.) |
Denmark (CVR)
| Tool | Description |
|---|---|
denmark_search_companies | Search companies by name (returns single best match) |
denmark_get_company | Get company details by CVR number |
denmark_get_production_units | List production units (P-numbers), paginated |
denmark_search_by_phone | Find company by phone number |
denmark_get_by_pnumber | Get company by P-number |
Note: Danish search returns only one result. Large companies often have multiple entities. Try variations like "[Company] Denmark", "[Company] A/S", or pre-merger names if the first result seems wrong.
Finland (PRH)
| Tool | Description |
|---|---|
finland_search_companies | Search companies by name (paginated, use filters for broad queries) |
finland_get_company | Get company details by business ID |
Note: Common names like "Nokia" return 900+ results. Use exact legal name ("Nokia Oyj"), filter by
company_form(OY/OYJ), or filter bylocationto narrow results.
Sweden (Bolagsverket)
Requires OAuth2 credentials. Set BOLAGSVERKET_CLIENT_ID and BOLAGSVERKET_CLIENT_SECRET environment variables.
| Tool | Description |
|---|---|
sweden_get_company | Get company details by organization number |
sweden_get_document_list | List annual reports (årsredovisningar) |
sweden_download_document | Download annual report by document ID |
sweden_check_status | Check API availability and OAuth2 status |
Note: Sweden has no name search in this API - you must have the org number.
Example Prompts
Company Search
- "Find Norwegian companies named Telenor"
- "Search for AS companies in Oslo"
- "Find Danish companies named Carlsberg"
- "Look up Finnish company Kone"
- "Find voluntary organizations named Røde Kors"
Company Details
- "Get details for Norwegian org 923609016"
- "Look up CVR 10150817"
- "Get Finnish company 0112038-9"
Board & Roles (Norway only)
- "Who is on the board of 923609016?"
- "Find the CEO of Equinor"
- "List all directors for org 914778271"
Signature Rights (Norway only)
- "Who can sign for company 923609016?"
- "Get signature rights for Equinor"
- "Who has prokura for 914778271?"
Branch Offices
- "What branches does 923609016 have?"
- "Search for branch offices named Equinor"
- "List production units for CVR 10150817"
Registry Updates (Norway only)
- "What companies changed since yesterday?"
- "Get recent registry updates"
- "What branch offices changed recently?"
Batch Operations (Norway only)
- "Look up these companies: 923609016, 914778271, 985399077"
- "Validate these org numbers from my spreadsheet"
- "Get details for multiple Norwegian companies at once"
Reference Data (Norway only)
- "List all Norwegian municipalities"
- "What is Oslo's municipality code?"
- "What does AS mean?"
- "List organization form codes"
Phone & P-Number Lookup (Denmark)
- "Find company with phone 33121212"
- "Look up production unit P-number 1234567890"
Sweden Lookups
- "Get Swedish company 5560125790"
- "Look up Volvo's organization number in Sweden"
- "What annual reports are available for 5560125790?"
- "List årsredovisningar for Swedish company X"
- "Is the Swedish API working?"
Sweden Setup
Sweden's Bolagsverket API requires OAuth2 authentication (free).
- Register for the värdefulla datamängder API (submit customer registration form)
- Access the Developer Portal to get your OAuth2 credentials
- Set environment variables:
export BOLAGSVERKET_CLIENT_ID="your-client-id" export BOLAGSVERKET_CLIENT_SECRET="your-client-secret"
The server will log whether Sweden credentials are configured on startup. If not configured, Sweden tools are simply not registered.
HTTP Mode
For remote access or integration with other tools:
# Start HTTP server
./nordic-registry-mcp-server -http :8080
# With authentication
./nordic-registry-mcp-server -http :8080 -token "your-secret-token"
# Full production setup
./nordic-registry-mcp-server -http :8080 \
-token "your-secret-token" \
-origins "https://app.example.com" \
-rate-limit 60 \
-trusted-proxies "10.0.0.0/8"
Security Features
- Bearer Token Auth: Optional authentication via
-tokenflag orMCP_AUTH_TOKENenv var - CORS Protection: Restrict origins via
-originsflag (comma-separated) - Rate Limiting: Per-IP rate limiting via
-rate-limit(requests per minute) - Trusted Proxies: Honor
X-Forwarded-Forfrom trusted networks via-trusted-proxies - Request Size Limits: 2MB default, 10MB max request body
Endpoints
| Endpoint | Description |
|---|---|
/ | MCP protocol (Streamable HTTP) |
/health | Liveness check |
/ready | Readiness check (verifies API connectivity) |
/tools | List all tools by country |
/status | Circuit breaker stats |
/metrics | Prometheus metrics |
Architecture
nordic-registry-mcp-server/
├── main.go # Entry point, HTTP/stdio transport, security middleware
├── internal/
│ ├── base/ # Shared HTTP client with resilience
│ │ └── client.go # Connection pooling, retries, rate limiting
│ ├── errors/ # Shared error types
│ │ └── errors.go # NotFoundError, ValidationError
│ ├── infra/ # Resilience infrastructure
│ │ ├── cache.go # LRU cache with TTL
│ │ └── resilience.go # Circuit breaker, request deduplication
│ ├── norway/ # Norwegian registry (Brønnøysundregistrene)
│ ├── denmark/ # Danish registry (CVR)
│ ├── finland/ # Finnish registry (PRH)
│ └── sweden/ # Swedish registry (Bolagsverket, OAuth2)
├── tools/
│ ├── definitions.go # Tool specifications (23 tools)
│ ├── handlers.go # MCP tool registration
│ └── registry.go # Tool metadata types
├── metrics/ # Prometheus metrics (namespace: nordic_registry_mcp)
└── tracing/ # OpenTelemetry tracing
Resilience Features
- LRU Cache: TTL varies by endpoint type (searches: 2min, details: 5-15min, documents: 30min, reference data: 24h)
- Circuit Breaker: Opens after 5 consecutive failures, 30s recovery timeout
- Request Deduplication: Identical concurrent requests share a single API call
- Rate Limiting: Semaphore-based concurrency control (15 concurrent requests)
- Retry with Backoff: Exponential backoff with jitter on transient failures
- Response Size Limits: 10MB for API responses, 100MB for document downloads
- Token Efficiency: Paginated responses (default 20 results) to minimize LLM context usage
Documentation
| Document | Description |
|---|---|
| Setup Guide | Installation, configuration, and troubleshooting |
| API Reference | Complete reference for all 23 tools with parameters, return values, and examples |
| Architecture | System design, request flow, resilience patterns |
| Production Readiness | Linux containers, Docker, Kubernetes, monitoring |
Development
# Build
go build .
# Test
go test ./...
# Lint (requires golangci-lint)
golangci-lint run
Future Vision: Integration with Public 360°
This server is designed to work alongside public360-mcp-server, which provides AI access to Public 360° document and case management systems used by Nordic public sector organizations.
The integration scenario:
A caseworker receives a permit application from a company. Today's workflow:
- Open the case in Public 360°
- Manually look up the company in Brønnøysundregistrene
- Verify the company is active and not bankrupt
- Check if the signer has authority
- Copy relevant details back into the case
With both MCP servers connected:
You: "I received permit application case 2024/12345.
The applicant is org 923609016. Verify the company
and check if the signature is valid."
AI: [Calls public360: sif_get_cases to get case details]
[Calls nordic-registry: norway_get_company to verify company]
[Calls nordic-registry: norway_get_signature_rights to check authority]
Result: Case 2024/12345 - Environmental permit application
Applicant: Equinor ASA (923609016) - ACTIVE
Signed by: [Name] - Authorized signatory ✓
Recommendation: Signature is valid. Company is in good standing.
Planned integration points:
| Nordic Registry | Public 360° | Use Case |
|---|---|---|
norway_get_company | sif_get_enterprises | Sync company data to contacts |
norway_get_roles | sif_get_contacts | Import board members as contacts |
*_search_companies | sif_create_case | Auto-populate case with verified company info |
sweden_download_document | sif_upload_file | Attach annual reports to cases |
This turns two separate data sources into a connected workflow where the AI can verify external data and update internal systems in one conversation.
Enhanced Registry Data (Future)
The current implementation uses free, open APIs. More comprehensive data is available through premium services:
Sweden (Bolagsverket)
| Current (Free) | Premium Potential |
|---|---|
| Basic company info | Board members and roles |
| Annual reports (årsredovisningar) | Authorized signatories (firmatecknare) |
| Company status | Company mortgages (företagsinteckningar) |
| Real-time updates (not daily batch) | |
| Historical board changes |
The free värdefulla datamängder API we use today provides company basics and annual reports. Bolagsverket offers additional e-services for authorized signatories and company mortgages. Third-party aggregators like Roaring.io provide enriched datasets combining multiple sources.
Finland (PRH)
| Current (Free) | Virre Service |
|---|---|
| Basic company details | Board members and managing directors |
| Digital financial statements (IXBRL) | Authorized signatories |
| Registration notifications | Procuration holders |
| Non-digital financial statements | |
| Translated Trade Register extracts | |
| Articles of association |
The free PRH Open Data API provides basic company information updated daily. The Virre Information Service offers board member details, signatory information, and document purchases. Contract clients get reduced fees for high-volume access.
Why this matters:
Norway already provides board members, roles, and signature authority through the free Brønnøysundregistrene API. Adding premium Sweden and Finland data would give consistent coverage across all four countries for:
- Verifying who can sign contracts
- Checking board composition for due diligence
- Accessing complete financial documentation
More MCP Servers
Check out my other MCP servers:
| Server | Description | Stars |
|---|---|---|
| gleif-mcp-server | Access GLEIF LEI database. Look up company identities, verify legal entities. |  |
| mediawiki-mcp-server | Connect AI to any MediaWiki wiki. Search, read, edit wiki content. |  |
| miro-mcp-server | Control Miro whiteboards with AI. Boards, diagrams, mindmaps, and more. |  |
| productplan-mcp-server | Talk to your ProductPlan roadmaps. Query OKRs, ideas, launches. |  |
| tilbudstrolden-mcp | Nordic grocery deal hunting. Find offers, plan meals, track spending. |  |
License
Apache License 2.0
Credits
- Built with Go MCP SDK
- Data from Brønnøysundregistrene, CVR, PRH, Bolagsverket