Added
Flows API
Create, list, and publish WhatsApp Flows directly through /v1/flows — no more building them by hand in Meta's Flow Builder.
Added
Event replay
GET /v1/events and /v1/events/{id} let you pull any event your webhook may have missed, instead of waiting on a support ticket.
Changed
Webhook signing rotated to HMAC-SHA256
All new webhook endpoints registered after this date sign deliveries with HMAC-SHA256 instead of SHA1. Existing endpoints are unaffected until re-registered.
Fixed
Template rejection reasons now included in the response
GET /v1/templates/{id} returns rejection_reason on a rejected template instead of just status: "rejected".
Added
Media upload from a source URL
POST /v1/media now accepts a url to fetch and store, instead of requiring a direct multipart upload.