Hey folks- After more research and implementing a simple API, I have a couple questions. The REST approach has the advantage of including the API directly in the controller action code to minimize code redundancy. I override the "to_xml" method in my models so that they produce the correct versions of XML for the API (i.e. they don''t include extra fields that have no visibility through the API). Is this a reasonable approach for the REST stuff? SOAP, while potentially suffering from a little bit of redundancy, has the distinct advantage of separating the API from the web application itself. While you can say that the application is just another way to present the API data, I like the separation idea. Any comments on this? Some sites (like flickr) appear to support both approaches. Is this common? Is it necessary? Finally, the Agile book mentions (on page 431) that the Layered Dispatching method and SOAP may have problems with remote callers behind proxies because they can strip off the required header. Is this a significant hurdle? Are proxies that do this common in companies? Jake -- Posted via http://www.ruby-forum.com/.