This error impacts SOAP calls only.

The most likely cause for a 404 or 405 error (beside a typo in a URL) is that you are pointing to the service namespace instead of its URL.

For instance, the namespace of the GetGlobalQuote API in the XigniteGlobalQuotes web service is: http://globalquotes.xignite.com/services/GetGlobalQuote.

That address does not point to a valid URL. The correct URL is http://globalquotes.xignite.com/v3/xGlobalQuotes.asmx.

Please review the API documentation for details.