What is the WhatsApp Coexistence API?
A Meta onboarding model that connects an existing WhatsApp Business app number to Cloud API while the business continues using the mobile app and supported companion devices.
Why is this important?
Coexistence reduces migration friction and adds CRM, automation, and AI to an established number without replacing every human workflow.
How it works
Embedded Signup returns asset identifiers and a token code, mirrors supported 1:1 messages, and emits state-sync and message-echo webhooks.
Technical example
A sales team replies from the Business app while an AI CRM logs mirrored threads, runs workflows, and suppresses duplicate automated responses.
Implementation notes
Handle echo webhooks, contact and history sync, unsupported app features, Cloud API billing, version migrations, and thread ownership.
