Are there open source solutions for sending messages to WhatsApp?

Question

Node.js

I want to send notifications about a scheduled event to clients with whom the administrator personally communicates via phone, otherwise it is difficult for administrators to do this manually. That is, in fact, these are not mailings or spam, but only transactional messages.
I know that whatsapp does not have a public API. And on github I found a library only in php, which, as I understand it, was written using the reverse engineering of the whatsapp application, but my platform is on node.js and there is no time to port the library.
I know that in amoCRM they implemented receiving and sending messages in whatsapp.
Perhaps there are services with which you can integrate to easily send messages to whatsapp?
Thank you.

Answer 1

Well, not at all, whatsapp has an API and it is becoming more and more open, although, of course, it is still far from being able to work with a regular user, well, because it is expensive and troublesome. You can read the information on the official Whatsapp API on their website and understand how their conditions suit you.
But where there are a lot of prohibitions, someone will find a loophole. There are still conditionally unofficial APIs. That is, such APIs as chat-api.com, WHAP. All of them allow you to send messages via Whatsapp and it all works quite simply. As I understand it, most of them are built to work through WhatsapP web, because if you work through the API, then Whatsapp WEB, as a rule, will not be available to you. I wrote a bot for one client and he asked me to do it through just one of these APIs, it's not difficult at all. Therefore, answering your question, these solutions are all conditionally open, because you can work with them and not particularly worry about bans, unless, of course, you abuse the mailing list. For example, my bot has never been banned, because everyone writes to him, and he answers and imitates the user's human activity. So hold on.https://habr.com/ru/post/515096/ .