It offers a searchable catalog of 321 federal laws, along with regulations, allowing visitors to explore legal material by title, article, topic, or text. The catalog includes widely used statutes and codes, such as the Federal Civil Code, Federal Labor Law, and Constitution, and displays record update information.

The site supports article-level reading, cross-references, and searches across portal content and original PDF documents, including historical versions. Users can save articles and organize them into folders in their browser, while tools for recent consultations help them return to legislation they have viewed. mLey.mx also points visitors to external legal resources, including court and judicial search services.

Built by its developer, armiok, the platform aims to support transparency, access to information, and broader understanding of Mexican law. It also provides information about the project and ways to support its continued development.