To start using the WhatsApp Business API, you will need the following:
A Facebook Business ID
A valid phone number with the ability to receive international phone calls or an SMS
A referral link to a signup form (supplied by your Software Partner or 360dialog)
A callback server (typically provided by your Software Partner)
Facebook Business ID
You need to have a Facebook Business ID. To find your Business ID, log into the Facebook Business Manager of the business and navigate to Business Settings. The Business Manager ID is displayed under the business name.
If you don’t have a verified Facebook Business account, you need to create a Facebook Business Manager. To create a Business Manager:
Via Classic Signup, after the Facebook Business Manager ID is provided, you will receive a Message on Behalf request. You need to accept it, so 360dialog can send messages on your behalf with your Facebook Business Manager ID.
Please, navigate in your Facebook Business Manager Account to Requests > Received to accept the request.
Only the admin of the FBM account can see this request and accepted it.
Verify your Business Client account
To keep connected to the API your Business Account must be approved in the WhatsApp Business Policy. That's why Business Verification is required.
This procedure also helps to protect users from false information and you can check the approval status in the Facebook Business Manager account.
Attention: Once you’ve completed the official form with the legal business details, you won’t be able to change them.
Go to Security Center and click Start Verification. If you haven’t logged in to your Business account, the button will be grayed out.
Enter your business details, click Next, and select your business from the list.
Select a phone number and confirm the details.
After you received the verification code, click the Submit button.