Whatsapp Business API Groups
What are the restrictions for Whatsapp Business API Groups.
Can I send messages all the time, or are these messages also restricted by the 24hr session time. How many groups can I create, could I e.g. create 100 groups, 1 for every person attending some event?
Is there anywhere I can find the pricing for creating these groups?
From WhatsApp API FAQ
Can I send any message to any user at any time? No.
If a user contacts an enterprise, the enterprise can respond with any type of message in the next 24 hours. This type of message is free.
But if the enterprise is contacting a user before the user sends a message or after more than 24 hours have passed, the enterprise can only send a message template. This is a paid notification.
Free-form text messages and media messages will not work outside this 24 hour window. They will result in a failure callback with error 470.
How many messages per second can I send? The maximum tested outbound message rate is 20 messages per second.