Recent highlights
Event API side effects clarified
POST /v1/events/send now documents its current behavior explicitly: event ingestion, contact updates, and synchronous event side effects happen in one transaction. Delayed template jobs are scheduled immediately, while future execution stays in the separate template-delivery worker.
Transactional send guidance expanded
Transactional email docs now call out:- locale fallback behavior
- attachment limits
addToContactbest-effort contact linking
MCP connection auth clarified
MCP documentation now reflects the live server behavior:- Bearer token in the
Authorizationheader - auth happens on the SSE connection
- tool-level
_apiKeyarguments are no longer part of the documented flow