A system may provide dynamic web-based content in conjunction with text message content. A user may use text messages to interact with web content (e.g., to select hyperlinks, request information, provide information, etc.). A content server may process the text messages, sent by the user, in order to determine web content to provide to the user. The text messages may be authenticated by a message relay server, thereby eliminating the need for the content server to request authentication or identification information from the user.