Data exchange between programs through a site on Wordpress?

Question

Data transfer

It is necessary to organize the exchange of information between many financial programs on different remote PCs.
Programs for financial markets are written in their own language and have a very poor set of functions for communicating with the outside world. The limit of possibilities is the transition to a given URL.
The idea is this.
Launch a website on WordPress. Under WP there is already a plugin that accepts a Get request, writes it to the database and gives a response.
Programs will send Get requests to the server once a second, reporting their status. In response, they receive different information from the database that other programs have written there.
In fact, for the exchange of information, the mysql database and wordpress are used as a shell with an interface.
At peak times, 50-100 requests per second come to the database. It turns out about 8 million per day.
3 hosters have already banned us for such decisions. Now we decided to just rent a VPS or a server.
What are the risks of such an approach? What is a simple alternative? (without DLL, sockets)
8 million hits to the site per day - is it a lot or a little?
How serious is this approach?

Answer 1

Vordress is honestly not designed for such solutions, I would recommend writing an API in Node JS + Express + MongoDB (there are a lot of tutorials on creating an API on the network) that will process your requests and issue responses.