URL
URL of the target service, excluding query parameters. Note The Web Service Task URL Whitelist Regular Expression Universal Controller system property specifies which URLs are supported by the Web Service task. (The default allows all URLs to be supported.) If a task instance attempts to run, but this URL does not match a URL specified by Web Service Task URL Whitelist Regular Expression, the task instance transitions to a Start Failure with an appropriate Status Description.
Optionally, you can include query parameters directly on the URL; however, the query string must be properly URL-encoded. In other words, the URL must be valid. For specifying unencoded query parameters, use URL Query Parameters.