SOAP (originally "Simple Object Access Protocol" is Anything but Simple, is not Really a protocol and no longer even stands for that as the acronym was dropped in V1.2 of the standard. SOAP is more of a processing model. XML is used most often as the data format and HTTP is used most often as the application protocol (though SMTP can also be used).
SOAP wraps up information in an XML structure so objects elsewhere can be queried. The problem is XML is kinda Verbose .. so its a bit slower than other potential options (a HTTP GET request wins out here)
Both SOAP and CURL requests are feature rich, giving you the option to send data encrypted or over a secure ssh link and to use public and private keys or to require a username and password.
Get stock information, weather data, Google searches, travel data, movie ratings, etc. using SOAP.
The Web Services Description Language (WSDL) file is an XML based file that describes the Web service. It describes how the service is called, what parameters are required and the data structure returned.
WSDL (Web Service Description Language) files are supposed to make things easier, but it appears that more often than not these files are used as a programmer reference rather than allowing the service to configure itself using the data contained within.
To use this site, first search the WSDL file for the word 'operation'. Put the operation desired into the operation text input. See what parameters the operation expects and plug in the keys and values (click the plus sign if more than one parameter is needed).
If you somehow manage to configure the correct SOAP style, version, namespace, encoding, stream context and optionally username/password values or even SSL keys, SOAP can be an option.
When the only option is to use SOAP, grin, bear it and use this site to make the task a bit easier.
If this tool encounters any issues during the validation, error messages will be reported.
There are tools that can be downloaded and configured for SOAP testing, but why go to the trouble when this site can do it for you.
Have fun and please let us know how it goes.