# Abstract ***Sign-In with Wallet*** allows Web3 wallet account owners to authenticate with Web2 and Web3 apps using their wallet credentials instead of traditional social media accounts. The implementation also allows for providing the calling app with custom defined Authorization levels. A first implementation is delivered for Cardano browser-plugin wallets. The goals of this specification are to provide a self-custody alternative to centralized identity providers, improve interoperability across off-chain services for Cardano-based authentication, and provide wallet vendors and website/app owners with a consistent solution for improving end-user experience during authentication and consent management. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://incubiq.gitbook.io/siww/specifications/creating-your-first-project.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.