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ayeshakhalid192007-dev
ayeshakhalid192007-devCOMMUNITY
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Better Auth OAuth/OIDC Setup Skill

Configure Better Auth OAuth 2.1/OIDC with PKCE and JWKS RS256.

1|Updated Feb 19, 2026
Search Tags:#authentication#better-auth#sso#oidc#oauth2#pkce#jwks
One-click install
npx skills add https://github.com/ayeshakhalid192007-dev/humanoid-ai-studio --skill better-auth-oauth-oidc-setup-skill-ayeshakhalid192007-dev
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Better Auth OAuth/OIDC Setup Skill
Source: https://github.com/ayeshakhalid192007-dev/humanoid-ai-studio/tree/main/.claude/skills/better-auth-setup
Command: npx skills add https://github.com/ayeshakhalid192007-dev/humanoid-ai-studio --skill better-auth-oauth-oidc-setup-skill-ayeshakhalid192007-dev

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Centralizes OAuth 2.1 / OpenID Connect authentication for multi-app platforms, enabling SSO, managed client registration, and robust token handling so teams avoid duplicated auth logic and insecure ad-hoc integrations.

Core Features & Use Cases

  • Auth Server Setup: Configure Better Auth with OIDC provider plugin to issue authorization codes, access tokens, and refresh tokens for public and confidential clients.
  • PKCE for Public Clients: Support secure SPA/mobile authentication flows without exposing client secrets by using PKCE.
  • Admin Controls & Seeding: Provide admin-only client registration endpoints and scripts or SQL seeds to pre-register trusted public clients for first-party apps.
  • Email & Verification Fallbacks: Integrate SMTP and Resend providers for verification and password flows with a prioritized fallback strategy.
  • JWKS & Offline Verification: Enable RS256 signing and a JWKS endpoint for offline ID token verification to reduce server load and scale securely.
  • Use Case: Deploy a central auth server that supports a Docusaurus frontend SPA, multiple internal services, and mobile apps with PKCE, admin-managed OAuth clients, and email verification.

Quick Start

Set up Better Auth with the oidc-provider plugin, enable PKCE for public clients, seed a trusted public client, and enable JWKS for RS256 token verification.

Frequently Asked Questions about Better Auth OAuth/OIDC Setup Skill

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

FAQPage Schema
How do I set up centralized OAuth2 and OIDC authentication for multiple apps?▼

Centralized OAuth2 and OIDC authentication for multiple apps is established by configuring a central auth server with Better Auth to issue authorization codes, access tokens, and refresh tokens. This provides SSO and managed client registration to avoid duplicated auth logic.

What is the best way to secure SPA and mobile authentication flows without client secrets?▼

SPA and mobile authentication flows are secured without client secrets by implementing PKCE for public clients. This prevents secret exposure while allowing these first-party applications to safely retrieve access tokens and ID tokens from the central auth server.

How does JWKS and RS256 key rotation work for offline token verification?▼

Offline token verification uses RS256 signing and a JWKS endpoint to allow public keys to be fetched for cryptographic validation. This reduces server load by letting services verify ID tokens locally without querying the auth server.

Can I manage OAuth client registration through admin-only endpoints?▼

Admin-only client registration endpoints allow administrators to control client registration. Trusted public clients for first-party apps can be pre-registered using scripts or SQL seeds, ensuring secure and managed access.

Does Better Auth support email verification fallbacks for password flows?▼

Email verification fallbacks for password flows are supported by integrating SMTP and Resend providers. This prioritized fallback strategy ensures reliable delivery of verification links during centralized authentication.

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