WhatsApp Coexistence for Developers: History Sync, Message Echoes and Contacts Without Breaking Your Inbox
Dev Communityvia NewsData.io
Most WhatsApp Cloud API integrations assume they own the number: every message in or out passes through your webhook and your send call. Coexistence breaks that assumption. A business keeps using the WhatsApp Business app on its phone and connects the same number to your platform, so messages now arrive from three directions at once: live customer messages on the normal messages webhook, a backfill of up to six months of old chats, and copies of whatever the owner types on their phone. Get the merge wrong and you get duplicate contacts, a chat list reordered by six-month-old messages, automati
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