This tool allows you to test SOAP API (but it does not generate XML request).
It creates HTTP requests on the client side, the calls are cross domain.
Cross-Origin Resource Sharing (CORS) is a mechanism to let a user agent gain permission to access selected resources from a server on another domain (than extendsclass.com).
You must allow CORS in your SOAP API. Example for CORS in php:
SOAP is an application communication protocol, it is a format for sending and receiving messages based on Extensible Markup Language (XML).
SOAP is extremely powerful, it provides a way to communicate between applications running on different operating systems.
SOAP allows to invoke web services independent of language and platforms!
Advantages of SOAP
Using HTTP makes communication easier and avoids proxies and firewall problems
Independent of the platform and the language
SOAP can operate over any protocol such as HTTP, SMTP, TCP, UDP, or JMS