# Setting Up an App ### App Registration * Register at -> OAuth Apps * Take note of your client ID / secret ### Key Components #### 1. Client ID * Unique identifier for your app * Assigned upon registration #### 2. Client Secret * Cryptographic key for API authentication * Keep confidential; never expose in client-side code. Treat like a password. * Required to fetch user authentication details #### 3. Redirect URIs * Endpoints where users are redirected after authentication * Must be pre-registered and use HTTPS * Not needed for delayed/QR code authentication. Only for immediate digital redirects. ### Security Notes * Treat client secret as securely as a password * Ensure exact match between registered and used redirect URIs (if applicable) * Use HTTPS for all redirects for security reasons --- # 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://docs.bitbadges.io/for-developers/bitbadges-api/sign-in-with-bitbadges/setting-up-an-app.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.