Apier blog

Plain-language developer guides for Norwegian compliance infrastructure. Each guide is written from the perspective of a developer integrating against the live system.

• Altinn 3 Migration for Developers — what changes on June 19, 2026 when Altinn 2 closes for new delegations. Role-to-access-package mapping, System User setup, and a live Altinn 2 code lookup.
• Maskinporten for Developers — virksomhetssertifikat, JWK upload, JWT client-credentials flow, System Users, and the ten pitfalls that cost a day each.