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io.github.hellosverre/brreg

Official registry Search and web

MCP server for Norway's Brønnøysund business registry — lookup, search, roles.

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package brreg-mcp
Claude Code 
claude mcp add brreg -- npx -y brreg-mcp@0.1.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "brreg": {
            "command": "npx",
            "args": [
                "-y",
                "brreg-mcp@0.1.1"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. brreg-mcp
  2. Why
  3. Install
  4. Tools
  5. Example prompts
  6. Data source
  7. Development
  8. License
  9. Disclaimer

brreg-mcp

MCP server for the Norwegian Central Coordinating Register for Legal Entities (Brønnøysundregistrene / Enhetsregisteret). Gives Claude Code and other MCP-compatible clients direct access to Norwegian company data — lookup, search, roles, subunits, and live updates.

No API key needed. Data is served by the free, public Brønnøysund Open Data API.

Why

Norwegian devs, accountants, and analysts constantly need to look up orgnumbers, find board members, or track subsidiary changes. Doing it through the web UI is slow; doing it with curl loses context. With this MCP, you just ask Claude.

Install

Claude Code

Add to your MCP config (~/.claude/settings.json or per-project .claude/settings.json):

{
  "mcpServers": {
    "brreg": {
      "command": "npx",
      "args": ["-y", "brreg-mcp"]
    }
  }
}

Restart Claude Code. Verify with /mcp — you should see brreg listed with 5 tools.

Claude Desktop

claude_desktop_config.json:

{
  "mcpServers": {
    "brreg": {
      "command": "npx",
      "args": ["-y", "brreg-mcp"]
    }
  }
}
Cursor / Windsurf / Zed / any MCP client

Same command: npx, args: ["-y", "brreg-mcp"] configuration.

Local development
git clone https://github.com/hellosverre/brreg-mcp
cd brreg-mcp
npm install
npm run build

Then point your MCP client at node /absolute/path/to/brreg-mcp/dist/index.js.

Tools

ToolWhat it does
lookup_companyFull details for one company by its 9-digit orgnr — name, address, NACE codes, employees, VAT status, bankruptcy, foundation date.
search_companiesSearch by name and optional filters (municipality, org form, industry code, VAT-registered, bankruptcy status). Paginated.
get_company_rolesAll registered roles (board, CEO, chair, auditor, sole proprietor) for a company.
search_subunitsFind subunits (branch offices, production sites) — scope to a parent company or by municipality/industry.
get_recent_updatesFeed of entity changes for monitoring new registrations, bankruptcies, status shifts.

Example prompts

"Look up orgnr 984661177 and show me the board."

"Find all VAT-registered software consultancies (NACE 62.010) in Oslo."

"List every subunit of Vygruppen AS."

"What Norwegian companies were just registered in the last hour?"

Data source

All data comes from data.brreg.no. Per Brønnøysund's open data terms, the data is free to use. Some endpoints (roles with personal identification numbers) require Maskinporten authentication and are not exposed by this server.

Development

npm install          # install deps
npm run dev          # run server in watch mode via tsx
npm run smoke        # hit the real brreg API to verify connectivity
npm run build        # compile to dist/
npx tsx scripts/mcp-probe.ts  # end-to-end stdio test

License

MIT

Disclaimer

Not affiliated with Brønnøysundregistrene or the Norwegian government. This is an independent open-source project using the public open-data API.

Frequently asked questions

What is io.github.hellosverre/brreg?

MCP server for Norway's Brønnøysund business registry — lookup, search, roles.

How do I install io.github.hellosverre/brreg?

It runs on your machine. In Claude Code: claude mcp add brreg -- npx -y brreg-mcp@0.1.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.hellosverre/brreg need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.hellosverre/brreg open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.hellosverre/brreg?

It is published by hellosverre. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.