The .well-known\/passkey-endpoints<\/strong> URI is a proposed standard designed to enable Web Browsers<\/a> and Password Managers<\/a> to programmatically discover the URL<\/a> endpoints for managing Passkeys<\/a> on a specific domain. This mechanism is built upon the framework established by RFC 8615<\/a>, which defines a path for well-known services. By hosting a JSON<\/a> file at this location, an Origin<\/a> can provide metadata about its WebAuthn<\/a> capabilities, specifically where a user can go to add, remove, or view their cryptographic credentials.<\/p> This discovery process is a vital part of the FIDO Alliance<\/a> and W3C<\/a> efforts to streamline the user experience for Passwordless Authentication<\/a>. When a user interacts with a site using FIDO2<\/a> protocols, the client software can query this endpoint to find the management interface, facilitating a seamless transition for users looking to upgrade their account security. Detailed technical documentation is available through the FIDO CTAP specifications<\/a> and the W3C WebAuthn Level 3 draft<\/a>.<\/p> Implementation of this endpoint involves serving a resource with the application\/json<\/code> media type. This allows for improved interoperability between Identity Providers<\/a> and the ecosystem of Authenticators<\/a>, ensuring that the lifecycle of a Passkey<\/a> can be managed effectively regardless of the specific platform or device used.<\/p>