e-Faktura API

Versioning

The API is versioned by URL prefix (/v1) for breaking changes, and by an optional Merot-Version request header (Merot-Version: 2026-10-01) for smaller, dated revisions within v1 — additive changes (new optional fields, new enum values, new endpoints) ship without a new date and are always safe to ignore. Every account has a pinned version; omit the header to use it.

Every response also echoes Merot-Version, so you can confirm which revision served a given request.

See the changelog for what’s shipped so far — this API’s first public version is dated 2026-09-26.