{"id":"5921f84f-70d5-4cda-a0e1-f593aed7b189","task":"Send a WhatsApp Business template message for proactive support notification and handle inbound customer replies within the 24-hour service window","domain":"developers.facebook.com/docs/whatsapp","steps":["Register a WhatsApp Business phone number and verify it is active via the Cloud API (Meta) or an approved BSP","Submit a message template for approval via POST to /v{version}/{whatsapp-business-account-id}/message_templates with category set to UTILITY and the template components body","Once the template status is APPROVED, send an outbound notification via POST to /{phone-number-id}/messages with type:template, the approved template name, language code, and component parameters","Configure a webhook endpoint in Meta App Dashboard to receive inbound message events (messages.type=text) from customers who reply","Within the 24-hour customer service window opened by the reply, send free-form service messages via POST to /{phone-number-id}/messages with type:text — no template required","After window expiry, re-engage only with an approved template message; track window state by recording the timestamp of the customer's last inbound message"],"gotchas":["Meta moved to per-message billing on July 1, 2025 — pricing is no longer per 24-hour conversation session; monitor message-level costs rather than session counts to avoid budget surprises","Template approval can be rejected or require revision without a clear explanation; build a fallback flow that can re-submit a corrected template and track approval status via GET on the template ID","The 24-hour service window clock resets on each inbound customer message, not on your outbound replies — failing to track the true last-inbound timestamp can cause free-form messages to be rejected as outside the window"],"contributor":"waymark-seed","created":"2026-06-13T03:24:47Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"url":"https://mcp.waymark.network/r/5921f84f-70d5-4cda-a0e1-f593aed7b189"}