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brreg — Claude Code skill: what it does, how to install

Search Norwegian companies through the Brønnøysundregistrene API and retrieve records by name, address, industry, status, or organization number.

Install into Claude Code · Skills CLI (Vercel) All methods and platforms ↓ 
npx skills add reason-machines/trending-skills --skill brreg -a claude-code
Open on GitHub

What brreg does

This skill connects an agent to the public Brønnøysundregistrene API. It supports company searches by name, organization form, NACE industry code, municipality, postal code, employee count, and registration dates. Queries can also filter bankruptcy, dissolution, and VAT registration, or fetch one record by organisasjonsnummer.

The skill covers endpoints for sub-entities, organization forms, and recent registry changes. For larger datasets, it points to JSON, CSV, and Excel downloads. Public API access needs no authentication, while heavy traffic may be rate-limited.

A single query returns at most 10,000 results. Use the bulk downloads for a complete dataset.

What it helps with

  • search Norwegian companies by name
  • retrieve a record by organization number
  • filter firms by industry and municipality
  • check bankruptcy or dissolution status
  • download registry data as JSON, CSV, or Excel

Example prompts for the agent

  • Find Norwegian companies whose names contain tech, then return their organization numbers.
  • Look up this company by organisasjonsnummer and show its address, industry code, and employee count.
  • List the sub-entities for company 923609016 and explain the pagination.

How to install brreg

1Skills CLI (Vercel)

npx skills add reason-machines/trending-skills --skill brreg -a claude-code

2Manually: put the files in place

~/.claude/skills/brreg/SKILL.md

Copy the whole skill folder; for one project use .claude/skills/brreg/

Step by step, with commands for each platform: How to install skills in Claude Code: five ways

Questions about brreg

How do I install brreg in Claude Code?

Run npx skills add reason-machines/trending-skills --skill brreg -a claude-code. The installed skill file is at ~/.claude/skills/brreg/SKILL.md.

What does brreg do?

It lets the agent search and retrieve Norwegian company records from Brønnøysundregistrene. It also covers sub-entities, registry status, and recent changes.

Does brreg require an API key?

No API authentication is required for the public records. Heavy usage may hit rate limits, and one query can return no more than 10,000 results.

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