Not Whatsapp, not officially at least. They will go after anyone who reverse engineers and publicizes an API. I think at some point they had the (IMO possibly

Not Whatsapp, not officially at least. They will go after anyone who reverse engineers and publicizes an API. I think at some point they had the (IMO possibly good) idea that they would make the client free of charge and make money by charging for API access for businesses etc but that was before (IMO as usual) they decided to go all in on scooping up user data and trying to copy Snapchat again ;-)