better-auth-setup

OAuth 2.1 and OIDC authentication with Better Auth requires configuring the OIDC Provider plugin, setting up JWKS for token management, and implementing PKCE for public clients. Better Auth centralizes this setup across multiple applications, enabling SSO and authorization server functionality with email verification and token lifecycle management.

PKCE (Proof Key for Code Exchange) is a security extension for OAuth 2.1 that protects public clients from authorization code interception attacks. Better Auth enforces PKCE for public clients and preserves PKCE parameters during sign-in redirects, preventing token theft in mobile and single-page applications.

Yes. Better Auth with the OIDC Provider plugin enables centralized authentication and single sign-on (SSO) across a platform by configuring a shared OAuth authorization server. Client integration uses fallback patterns for reliability, allowing multiple applications to authenticate against one identity provider.

JWKS (JSON Web Key Set) configuration in Better Auth exposes public keys used to validate signed tokens. Better Auth manages token issuance and JWKS endpoints, enabling clients to verify token authenticity without accessing the authorization server's private keys, supporting secure distributed token validation.

Better Auth as an OAuth server centralizes identity and issues tokens to multiple client applications via the OIDC Provider plugin, with JWKS and PKCE enforcement. As a client, Better Auth integrates with external identity providers. This Skill covers server-side setup for platform-wide SSO and authorization.

No. Better Auth's OAuth setup includes built-in email verification as part of the authentication flow. The server manages verification state and token issuance, reducing implementation work for client applications while maintaining security for user identity.