REST is the simplest request format to use - it's a simple HTTP GET action.
The REST Endpoint URL is http://www.onecentralplace.org/api/
For example, a call to the ocp.list.categories method would be as below. Notice the required parameter 'key' is passed. Any unrecogrnised parameters will be ignored.
http://www.onecentralplace.org/api/list/categories/?key=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
By default, REST requests will send an XML response.