Techniques to ensure that user agent information is transported includes determining whether both a type field and a client platform information field are included in a first portion of a uniform resource locator field (URL) of a hypertext transfer protocol (HTTP) request message received from a remote client process. The first portion is different from a domain portion of the URL. The type field holds data that indicates whether the remote client inserted the client information field into a URL of an original HTTP request message. If both the type field and the client platform information field are included, then it is determined, based on data in the type field, whether to include both the type field and the client platform information field in a first portion of a URL in a link in a HTTP response message. The HTTP response message is sent to the remote client process.