txtNation is a Mobile Billing and SMS Messaging provider. The Payforit API allows developers to bill their users' phones without making them leave the WAP site. The API is a one off payment version of the Payforit system accessed using the txtNation Gateway.
Once the user has chosen to pay for a particular product on the WAP site, developer should pass variables describing the product and transaction to initiate the transaction. These variables are sent with either the GET or POST method.