These have popped up from time to time using http to communicate messages but they tend to be complex and usually go down because of lack of maintenance. So I figure I will post an extremely bare bones method with both server and client. The server requires MySQL and php to run.

Server

Client

example
Spoiler

os.loadAPI("cloudnet")--#have to load it first
local network = cloudnet.create("http://www.example.com","foobar")--#creates or loads a table to store data named foobar
network.store("a header","this is a message","dummy variable")--#store data
local data = network.get()--#returns all data in the form of a table
local data = network.get("dummy variable","dummy")--#returns all data where dummy="dummy variable"
network.remove("a header","header")--#deletes all entries where header="a header"