Businesses have go through an approval procedure to access the WhatsApp Business API.
The prerequisites for access to WhatsApp Business API are as follows.
Requirements for the number you want to use in WhatsApp communications:
1. Must be a phone number that’s open to incoming calls 2. Must not have an active WhatsApp account 3. Has never utilized the WhatsApp API before
Requirements for your Facebook Business Account:
1- A verified Facebook Business Account (unverified accounts can complete the verification process from Business Details) 2- Facebook Business ID 3- The number that you want to use must be saved in the Business Number field on the Business Details page