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?

Clone io.github.hellosverre/brreg from https://github.com/hellosverre/brreg-mcp and configure it as an MCP server in your client (Claude Desktop, Cursor, or VS Code).

Is io.github.hellosverre/brreg open source?

Yes, io.github.hellosverre/brreg is open source under the MIT license. Source code is available at https://github.com/hellosverre/brreg-mcp.

What category does io.github.hellosverre/brreg belong to?

io.github.hellosverre/brreg is listed under Developer Tools MCP servers on MCPFind.

io.github.hellosverre/brreg — MCP Server for Developer Tools

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

Tool	What it does
`lookup_company`	Full details for one company by its 9-digit orgnr — name, address, NACE codes, employees, VAT status, bankruptcy, foundation date.
`search_companies`	Search by name and optional filters (municipality, org form, industry code, VAT-registered, bankruptcy status). Paginated.
`get_company_roles`	All registered roles (board, CEO, chair, auditor, sole proprietor) for a company.
`search_subunits`	Find subunits (branch offices, production sites) — scope to a parent company or by municipality/industry.
`get_recent_updates`	Feed 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.

Set up in your AI client

AI clientOperating system

Merge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.

json

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

Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.

Claude Desktop setup reference

Compatible MCP Clients

io.github.hellosverre/brreg works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.

Claude Desktop~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.

Cursor~/.cursor/mcp.jsonRestart Cursor for changes to take effect.

VS Code.vscode/mcp.jsonReload VS Code window for changes to take effect.

Windsurf~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect.

Claude Code.mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.

io.github.hellosverre/brreg