One penny per message.

PENNY SMS provides an JSON-RPC server for third parties to integrate into their applications. An JSON-RPC message is an HTTP-POST request. The body of the request is in JSON. The JSON-RPC request executes a procedure on the server and returns a status formatted in JSON.

PLEASE NOTE: that a "Content-Type: text/json" HTTP header must be sent as part of the HTTP-POST request.

URL for JSON-RPC Requests:
http://api.pennysms.com/jsonrpc

RPC Method:
send

parameter	type	definition
api_key	string	The API Key provided by PENNY SMS
from	string	Who the SMS message will appear to come from The email address where you can view replies to your outgoing messages
phone	string	The ten digit cell phone number More than one cell phone number can be provided, to send the same message to multiple people. Seperate multiple numbers with a space.
text	string	The text message. The message must be shorter than 160 characters.

Sample JSON-RPC Request

{ "method": "send",
  "params": [
            "YOUR_API_KEY",
            "msg@mycompany.com",
            "5551231234",
            "Test Message from PENNY SMS"
            ]
}