Changelog

Changes within v1 are additive only: a new optional request field or a new response key may appear, and nothing is renamed, removed or retyped. A change that cannot be additive ships as /v2 alongside /v1, never in place of it.

Anything being switched off is announced by email and by the Deprecation and Sunset response headers, with at least six months' notice.

Not written yet

This page is a placeholder. The site's build and hosting are in place; the prose is not. What belongs here:

• One dated entry per change, newest first
• The first entry once v1 is announced to a partner