Brreg — Claude Code MCP server: what it does, how to install
Connects Norway's company register Enhetsregisteret to your AI agent. Search businesses by number or name, inspect financials, and filter by location.
claude mcp add --transport http brreg https://brreg.publifye.com/mcpWhat Brreg does
This hosted server provides 9 read-only tools querying official data from Brønnøysundregistrene. Looking up an organisation number performs a strict checksum verification without guesswork. When resolving company names, it strips legal suffixes like AS, normalises Norwegian letters æ, ø, and å, and returns ranked candidates rather than picking one arbitrarily. Register files refresh every week.
Search filters support NACE industry codes, geographic municipalities, and RE2 regular expressions across emails or activity fields. Radius searches run up to 10 km alone or 50 km alongside another filter. Because Kartverket address points exclude post boxes and c/o addresses, entities with those details never appear in distance queries.
The service operates over HTTPS using streamable HTTP transport. You do not need to generate or rotate API keys. Authentication uses OAuth 2.1 via your browser on first launch with a Publifye account.
What it helps with
- Retrieve Norwegian company details by organisation number with checksum validation
- Match ambiguous enterprise names while handling Norwegian characters æ, ø, and å
- Filter local businesses within a specific radius by NACE industry classification
- Pull filed accounting figures directly from Regnskapsregisteret
Example prompts for the agent
- Look up Norwegian organisation number
987654321and verify its current status - Find engineering companies within 10 km of latitude 59.91 and longitude 10.75
- Fetch key financial records from Regnskapsregisteret for this company
How to install Brreg
Platform CLI: remote server
claude mcp add --transport http brreg https://brreg.publifye.com/mcpPlatform CLI: remote server
codex mcp add brreg --url https://brreg.publifye.com/mcpConfig file
{
"mcpServers": {
"brreg": {
"url": "https://brreg.publifye.com/mcp"
}
}
}Config file
{
"servers": {
"brreg": {
"type": "http",
"url": "https://brreg.publifye.com/mcp"
}
}
}Platform CLI: remote server
gemini mcp add -t http brreg https://brreg.publifye.com/mcpStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about Brreg
How do I install Brreg in Claude Code?
Run claude mcp add --transport http brreg https://brreg.publifye.com/mcp in your terminal. Next, start Claude Code and type /mcp to authenticate in your browser.
What does the Brreg MCP server do?
It exposes nine capability tools to inspect Norwegian company data from Enhetsregisteret. Your agent can resolve business names, search addresses by coordinates, and query annual accounts.
Do I need an API key to access Brreg?
No API key is required. The connection authenticates via OAuth 2.1 with PKCE in a browser using a Publifye account on first use.
