API changelog

API version 2026-10-15

Responses identify the API build in Buddy-Api-Version. Additive fields and event types may appear without a breaking version; ignore fields you do not use.

Subscriber opt-out errors use subscriber_opted_out. Public objects use typed IDs such as sub_ and msg_. Bare UUIDs remain accepted where documented for compatibility.

Breaking changes during beta receive at least 14 days' notice in this changelog and a notice to key owners. Deprecated endpoints expose Deprecation and Sunset headers when applicable.