WhatsApp Number Filter API allows you to filter WhatsApp and non WhatsApp number by passing the number along with country code.
Phone Automation Each number lookup response takes minimum 7 seconds and maximum 120 seconds based on how many numbers you are passing and how fast your phone can process the request. If you pass 10 numbers to look up it may take 70 seconds to 1200 seconds to complete the request.
API response timeout is set to 120 seconds so please setup Event Webhook if you are passing more than 6 numbers in a minute.
WhatsApp Official : A Lot of lookups without sending messages leads to suspension of your WhatsApp official account, so please make sure you use the filter feature only when you really want to send messages. Don't use this as a tool to filter your existing database
Pass "action=1" for selecting WhatsApp Filter as action.