Versioning

Date-based API versions. One API, no legacy split.

The Onzo API is versioned by date, pinned per account:

Onzo-Version: 2026-09-01

Breaking changes only ship in new versions; your pinned version keeps working. Non-breaking additions (new fields, new endpoints) appear in all versions.

There is exactly one Onzo API. No legacy variants, no parallel auth models, no migration matrix — the advantage of being built now, kept deliberately.