username which contains your portal/API username, and apiKey which contains your API access key.
Like any programming interface the SoftLayer API at times needs to return error messages to its users. The SoftLayer API brings these exceptions forward to the user so their application can handle the unexpected result.
The SoftLayer API is built around the same system of user permissions that power the SoftLayer customer portal.
SoftLayer provides a PHP-based API client that takes the heavy lifting out making manual SOAP or XML-RPC calls. To use the PHP-based API client, the following system requirements must be met: