For authentication, you must provide your API username and password. Thi= s is different to the account username and password that you use to log on = to the web interface.
You can find your API username and password via the web interface, Messa= ge Box:
http://messagebox.textmarketer.co.uk/ (Account Setti= ngs > API Config tab)
There are a couple of ways to pass this information to the API. The firs= t is via the GET/POSTvariables. For example you could put them in the GET v= ariables like this:
http://api.textm= arketer.co.uk/services/rest/credits?username=3Du&password=3Dp=20
When using the POST action, you would need to add the username/password = variables to the POST arguments instead.
The second option, for those who prefer it, is to use HTTP Basic Authentication.
All the REST API services are available using an SSL connection, i.e. us= ing https URLs instead of http.