oauth-oidc-protocols

To implement the OAuth 2.0 Authorization Code flow with PKCE for a native client, you must generate a code verifier and challenge, redirect the user for authorization, and exchange the resulting code plus verifier for access tokens. This Skill outlines the exact steps to complete this flow securely.

OAuth 2.0 and OpenID Connect protocols differ fundamentally in purpose; OAuth 2.0 provides authorization for API access delegation, while OpenID Connect builds upon it to deliver identity verification through ID tokens. This Skill provides structured guidance on designing and debugging both protocols.

To troubleshoot token introspection and refresh token rotation failures, you need to validate the token lifecycle states and verify the secure exchange of refresh tokens. This Skill provides practical troubleshooting steps to debug token management and resolve security extension issues.

JWKS discovery works by allowing your API to dynamically fetch the public keys required to validate OpenID Connect ID tokens from a well-known endpoint. This Skill guides you through configuring discovery endpoints and verifying token signatures using JWKS for your APIs.

You need PKCE for native and SPA clients, while DPoP provides sender-constrained tokens for service-to-service OAuth 2.0 scenarios to prevent token replay. This Skill enforces best practices for applying security extensions across web apps, APIs, and native clients.

The best way to debug OAuth 2.0 flows for Single Page Applications is to analyze the redirect URIs, validate token lifecycles, and ensure proper PKCE implementation. This Skill provides structured troubleshooting content to resolve protocol issues in SPA architectures.