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configuring-better-auth

Implement OAuth 2.1 and OIDC authentication with Better Auth for SSO servers and Next.js clients.

9|2|Updated Jan 31, 2026
Search Tags:#oauth#better-auth#next.js#sso#oidc#pkce#jwks
One-click install
npx skills add https://github.com/AbdullahMalik17/Hacathan_5 --skill configuring-better-auth-abdullahmalik17
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: configuring-better-auth
Source: https://github.com/AbdullahMalik17/Hacathan_5/tree/main/.claude/skills/configuring-better-auth
Command: npx skills add https://github.com/AbdullahMalik17/Hacathan_5 --skill configuring-better-auth-abdullahmalik17

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires better-auth, @better-auth/oidc-provider, drizzle-orm, jose, and includes scripts (resource) and references (resource) components.

What problem does it solve? Setting up centralized OAuth 2.1/OIDC authentication with Better Auth involves complex configuration across auth servers and client apps, with common pitfalls like lost PKCE parameters, misconfigured JWKS, and broken token refresh flows. ## Core Features & Use Cases - Auth Server Setup: Configure Better Auth with the OIDC provider plugin, PKCE for public clients, JWKS signing, email verification, and admin-only client registration. - SSO Client Integration: Implement PKCE login flows, httpOnly cookie token storage, JWKS-based token verification, token refresh, and global logout in Next.js apps. - Use Case: You are building a platform with multiple Next.js apps that need single sign-on. Use this Skill to stand up a central Better Auth server and connect each app as an SSO client with secure PKCE flows. ## Quick Start Ask the AI to set up a Better Auth OIDC server with PKCE and integrate a Next.js app as an SSO client.

Frequently Asked Questions about configuring-better-auth

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I set up an OAuth 2.1 server with Better Auth?▼

Install better-auth with the oidc-provider plugin and a drizzle adapter, then configure loginPage, consentPage, and requirePKCE in the plugin options. Register OAuth clients with redirect URIs and use public client type with PKCE for SPAs.

How to implement PKCE login flow in a Next.js app?▼

Generate a code verifier with crypto.getRandomValues, derive a SHA-256 code challenge, and redirect to the SSO authorize endpoint. Exchange the returned code with the verifier at the token endpoint, then store tokens in httpOnly cookies.

Does Better Auth support JWKS token verification?▼

Yes, Better Auth's jwt plugin exposes a JWKS endpoint using RS256 signing. Clients verify ID tokens locally with jose's createRemoteJWKSet against the auth server's /api/auth/jwks endpoint without per-request server calls.

Why does PKCE code verification fail after sign-in redirect?▼

The sign-in form drops code_challenge and code_challenge_method parameters when rebuilding the OAuth URL after authentication. Extract and forward these parameters in the redirect, and store the verifier in an httpOnly cookie before redirecting.

When should I not use this Better Auth OAuth approach?▼

Avoid this setup when you only need simple session-only authentication without OAuth or OIDC requirements. The full SSO architecture with PKCE, JWKS, and token refresh adds complexity unnecessary for single-app session auth.

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