configuring-better-auth

OAuth 2.1 and OIDC authentication in Next.js can be implemented using Better Auth with PKCE flow support for public clients. This Skill provides a structured blueprint covering centralized auth server setup, JWKS verification, and SSO client integration with httpOnly cookies for secure token handling.

PKCE (Proof Key for Code Exchange) is a security extension for OAuth 2.1 that protects public clients like SPAs and mobile apps from authorization code interception attacks. It requires exchanging a dynamically generated code verifier during token requests, which this Skill covers for Next.js SSO implementations.

A centralized auth server with Better Auth requires configuring OAuth/OIDC endpoints, PKCE support, admin client management, and JWKS endpoints for token verification. This Skill provides guided configuration steps and MCP integration for standardized setup across your SSO infrastructure.

Yes, Better Auth supports OIDC client integration with centralized auth servers through PKCE flows and JWKS-based verification. This Skill covers configuring Next.js applications as OIDC clients, enabling seamless SSO with httpOnly cookies and token validation.

JWKS (JSON Web Key Set) verification validates JWT tokens using public keys from your auth server without requiring token storage. This Skill demonstrates JWKS endpoint configuration and verification logic for secure token validation in Better Auth implementations.

Yes, admin client management in Better Auth handles server-to-server authentication distinct from user SSO flows. This Skill covers configuring both user OIDC clients with PKCE and admin clients for centralized auth server operations.