post https://{YourRegion}.webexconnect.io/resources/v1/messaging/
Share contacts on WhatsApp to your customers. This message type can be sent within 24 hour window after a customer initiated message. Note: Modify YourRegion in the URL to the right to reflect your tenant’s region. See Know your endpoint page.
Error Codes
Refer to the below page https://developers.imiconnect.io/reference/channel-specific-status-codes-1#whatsapp