I think it would be safe to remove the bulk verification function from this.<p>I have built this same project with Whatsapp Web and have played with this approach to it's limits.<p>Whatsapp Web has started to count the number of Whatsapp Web requests you are making and if it exceeds a threshold they will just block your number with no support to reach to.<p>This feature was heavily abused in Indian general assembly elections and led to a lot of spam alerting Whatsapp to setup checks on this.<p>Would recommend adding a cautionary note.