This service and policy is carrier-specific. I assume you are referring to a North American carrier because most providers around the world (except N. American

This service and policy is carrier-specific. I assume you are referring to a North American carrier because most providers around the world (except N. American operators) charge the txt message senders and not receivers. The type of web service you refer to can only be supplied by the carrier. Usually, carriers prefer that you pay them to create a new shortcode and connect directly via SMPP to their SMSC gateway if you want to send large volumes of text messages. Otherwise, you're out of luck unless you have a data cable, convert your phone into a modem and find specific software pertinent to your device that allows you to control the device SMS client. Good luck.