To run an action at a specific path, you will need to HTTP POST the following information to http://servername/apiput.aspx.

username=
password=
path=
actionID=task
taskID=actionName
json=

The username entry should be a valid username, and password should be a base-64 encoded version of the password. 

Note: The password is encoded to stop casual snooping of the login information, but it is not particularly secure. If possible use HTTPS to access the server. 

The path variable is the XPath to the location in the database where you wish to run the action. It can be an empty string for a global action.

Finally, the json entry will be the JSON of the record parameter data to the action, also encoded in base64.