What does the authority classification return?

You get a classification of the acting capacity — for example one person alone, or jointly — 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, combination rules from Fullmakttjenesten, with Altinn for the system-user and delegation context — Apier sells the interpretation on top, not the raw role data.

Solution

Who can sign for the company

Before a binding action is attempted, you need to know who is allowed to commit the company. This combo resolves signaturrett, prokura and combination rules into one clear acting-capacity answer — instead of you interpreting the role registers yourself.

What it does

Authority classifies the acting capacity and lists who can actually sign.

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 about to make a binding submission that must confirm acting capacity first.
Platforms setting up Altinn system users that need to know who can approve a delegation.

A concrete example

Resolve acting capacity for a company (authenticated with an API key):

curl -H 'Authorization: Bearer <API_KEY>' https://www.apier.no/api/v1/company/999999999/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 and safe to act for at all.
Altinn system users guide — how delegations and system users fit together.

Frequently asked questions

What does the authority classification return?: You get a classification of the acting capacity — for example one person alone, or jointly — 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, combination rules from Fullmakttjenesten, with Altinn for the system-user and delegation context — Apier sells the interpretation on top, not the raw role data.

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.