What does the authority classification return?

You get a convenience classification derived from the register's combinations (for example one person alone, or jointly), not a legal determination, with a short Norwegian summary, plus lists of the signaturrett and prokura holders with their role where defined.

What happens if the combination rules aren't available?

Combination rules come from Fullmakttjenesten where they are present; when that service is unavailable the answer degrades gracefully to the holders list rather than failing.

Where does the authority data come from?

Signaturrett and prokura are read from the open Brønnøysund role registers and combination rules from Fullmakttjenesten. Apier reads no Altinn data. Apier delivers source- and time-stamped facts, not an interpretation of the roles.

Solution

The register's signing rules for the company

Before a binding action is attempted, you need the register's record of who may commit the company, alone or jointly. This combo returns the register's coded signing rules, uninterpreted, with prokura and combination rules, so your agent applies them itself.

What it does

Authority returns the coded signing rules, a convenience classification and the lists of signaturrett and prokura holders.

A classification (for example one person alone, or jointly) with a short Norwegian summary.
Holders of signaturrett and prokura listed with their role, where defined.
Combination rules from Fullmakttjenesten where present — degrades gracefully to the holders list when the service is unavailable.

Who it's for

For anyone about to let someone act on a company's behalf.

AI agents that must read the signing rules before they act for a company.
Platforms onboarding many companies that need the register's coded signing rules for each of them.

A concrete example

Fetch the signing rules for a company (authenticated with an API key):

curl -H 'Authorization: Bearer <API_KEY>' https://www.apier.no/api/v1/company/{org}/authority

The response gives a classification, a summary, and lists of signaturrett and prokura holders — plus combination rules where present. Full request and response in the recipe.

Sources

Company Verification — whether the company is active at all, with source and date.
Norwegian company register search guide: find and verify the company before you read its signing rules.
Brreg signing authority API: the request, the JSON response and every field.
Know Your Business Agent (KYBA): which company stands behind an AI agent, and the layer Apier provides.
Who can sign for a Norwegian company? The definitional walk-through of who actually binds the company.
How do I verify company signing authority (signaturrett) via API?
What is the difference between prokura and signaturrett?
What do the company roles in Brønnøysundregistrene mean?

Frequently asked questions

What does the authority classification return?: You get a convenience classification derived from the register's combinations (for example one person alone, or jointly), not a legal determination, with a short Norwegian summary, plus lists of the signaturrett and prokura holders with their role where defined.
What happens if the combination rules aren't available?: Combination rules come from Fullmakttjenesten where they are present; when that service is unavailable the answer degrades gracefully to the holders list rather than failing.
Where does the authority data come from?: Signaturrett and prokura are read from the open Brønnøysund role registers and combination rules from Fullmakttjenesten. Apier reads no Altinn data. Apier delivers source- and time-stamped facts, not an interpretation of the roles.

Get started

Try the endpoints in the sandbox with no signup, or see pricing and the founding offer.

Try the sandbox Pricing & founding offer

Or sign up for an API key to call the authenticated endpoints.