A user agent in a Web access device transmits an HTTP request for Web content to an origin server. The request contains a set of capabilities of the Web access device. A content authoring mechanism and adaptation determination service on the origin server process the request to determine what transformation is required to make the requested content fit the capabilities of the Web access device. The adaptation determination service invokes a niche transformation service that performs, in response to the content and the capabilities, the necessary transformation. The transformed Web content is transmitted to the user agent.