Send from any ERP
POST /send with X-Api-Key — plain text, approved template or media. Delivery status comes back to your callback URL, signed.
24-hour window handled
Free text goes out as text when the parent replied recently, otherwise as your utility template automatically.
Webhook built in
Sent / delivered / read / failed, inbound replies and template approvals arrive at /webhook.
Multi-account
Each WhatsApp number has its own API key, limits, signature and fallback template — all on one Meta App.
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