web.whatsapp.com
WhatsApp — Delete message
Input
name requiredExact chat/contact/group name containing the message, as WhatsApp lists it in the chat list (an unsaved contact is titled by phone number).
scope required"everyone" works on your own messages within WhatsApp's ~2-day window, or (if you're a group admin) on any other member's message in that group; throws if not offered. "me" removes it from your view only.
messageId requiredMessage id (the id/data-id from get_conversation or search_messages; a short-form id without the fromMe_chatId_ prefix is also accepted).
Output
scope requireddeleted requiredmessageId requiredrecipient required