Enhetsregisteret over MCP
Brreg — the Norwegian company register, for your AI
Ask an AI about a Norwegian company and it will confidently invent an organisation number. Brreg gives it the register instead: lookup by organisasjonsnummer, filtered search, organisational structure and key financials — and a name returns candidates rather than a silent pick.
- 1,174,268
- organisations
- 863,374
- sub-units
- 449,313
- with filed annual accounts
- 4,220
- public bodies
- NLOD
- open data licence
- 6
- tools, read-only
The problem it solves
An organisation number is nine digits with a checksum, which makes it exactly the kind of thing a language model will produce fluently and wrongly. The same goes for a company name that nearly matches four others.
Brreg answers from the register. A number returns the entity; a name returns candidates, because guessing which of four similarly named companies someone meant is the one thing a lookup tool must not do. Financials are fetched only when a call asks for them, and every answer carries its snapshot and its attribution.
It is also explicit about what it is not: not the authoritative register, no roles, no persons, no bulk export. The wording that matters is in every successful response, not buried in a footer.
Is this the one you want?
We make five of these and they do different jobs. Only this page has a reason to tell you when the answer is one of the others.
| If you want to | Use |
|---|---|
| Read the Hebrew or Greek, and check it | Darash |
| Write a book, study or sermon series and publish it | Junifye |
| Keep the terms you define, with sources and versions | Lexifye |
| Look up a Norwegian company or its accounts | Brreg — this one |
| Read the current text of Norwegian law | Lexar |
| Convert a currency at a published central-bank rate | Currency |
| Just read a Bible, on a phone, offline | BibleRead |
Who it is for
- Anyone invoicing, contracting or doing due diligence who needs the number to be right rather than plausible.
- A developer who needs Norwegian entity resolution inside their own product and does not want to build a register client and a checksum validator.
- A service that needs to turn a ministry or agency name into a stable identifier without a human in the loop.
Questions people ask first
What is Brreg?
Brreg is a lookup service over Brønnøysundregistrene's Enhetsregisteret, with key financials from Regnskapsregisteret attached by organisasjonsnummer. It speaks the Model Context Protocol, so your AI assistant can look a company up mid-conversation: by number, by name, by address, or by walking an organisational structure.
Do I need to install anything?
No. Brreg is an MCP server and you sign in from the browser. It is OAuth only — there is no API-key route on this one.
Is this the official register?
No, and it says so in every answer. It is a normalised weekly snapshot with selected fields, and anything that matters legally should be verified at virksomhet.brreg.no. It holds no roles and no person records, and it is not a reidentification tool.
Can I try it before paying?
The data is open under NLOD and the service is metered. Current terms are on the Brreg site rather than here.
How current is the data?
The snapshot is rebuilt weekly from the bulk download, and every response carries the snapshot identifier so a session can be pinned to one. Entities removed from the open data are suppressed within a day rather than waiting for the next snapshot.
Where does the data come from?
Brønnøysundregistrene, under the Norwegian Licence for Open Government Data. The attribution travels in every successful response, in the initialisation text and in the service descriptor — not only in a footer somewhere. Sole proprietorships are personal data, so contact fields are dropped at normalisation and an address-only lookup will not return them.