require 'tropo-webapi-ruby'
require 'sinatra'

post '/index.json' do

    t = Tropo::Generator.new

    t.say "Welcome to Tropo!"

    t.response
end

var http = require('http');
var tropo_webapi = require('tropo-webapi');

var server = http.createServer(function (request, response) {
	
	var tropo = new TropoWebAPI();

	tropo.say("Welcome to Tropo!");
	
	response.end(TropoJSON(tropo));

}).listen(8000); 

<?php

require 'tropo.class.php';

$tropo = new Tropo();
$tropo->say("Welcome to Tropo!");
$tropo->RenderJson();

?>

from itty import *
from tropo import Tropo

@post('/index.json')
def index(request):

    t = Tropo()
    t.say("Welcome to Tropo!")
    return t.RenderJson()

run_itty(server='wsgiref', host='0.0.0.0', port=8888)

{
   "tropo":[{"say":{"value":"Welcome to Tropo!"}}]
}