SMS Gateways

An SMS gateway turns an HTTPS request into a text message. Call it from your server, never the browser, which would expose your credentials. Twilio 1,448 's REST call is a POST to api.twilio.com/2010-04-01/Accounts/{AccountSid}/Messages.json with To, From and Body fields and your SID and auth token as Basic credentials; US messages start at $0.0083 per segment plus carrier fees. Clickatell 128,269 now sells SMS to more than 230 territories inside a wider messaging platform that also covers WhatsApp 54 , with pricing quoted by its sales team. One segment holds 160 GSM-7 characters; a single emoji switches to UCS-2 and cuts that to 70.