This is my first time attempting to call an ASP.NET page method from jQuery. I am getting a status 500 error with the responseText message that the web method cannot be foun
Your web method needs to be public and static.
Clean the solution and rebuild. I've seen webmethods throw 500's until you do this.
Add public static before your method...
public static
ex.
[WebMethod] public static string MethodName() {}