Exposing Apex Methods as SOAP Web Services

You can expose your Apex methods as SOAP Web service APIs so that external applications can access your code and your application. To expose your Apex methods, use WebService Methods.

Tip

• Apex SOAP Web services allow an external application to invoke Apex methods through SOAP Web services. Apex callouts enable Apex to invoke external Web or HTTP services.
• Apex REST API exposes your Apex classes and methods as REST Web service APIs. See Exposing Apex Classes as REST Web Services.