OAuth 2.0 PKCE Wire Trace
Step 1 of 4
Single Page App
User-Agent / Browser
Auth Server (IdP)
OAuth 2.0 / Token Endpoint
Protected API
Resource Server
Execute and trace modern authentication handshakes step-by-step. Inspect cryptographic challenges, live PKCE code exchange, Passkey WebAuthn biometric ceremonies, and decode production-grade JWT security tokens in real time.
Click an RFC error condition to simulate real-world handshake breakdown and inspect the exact remediation steps:
Download complete protocol verification artifact including cURL replication script, Mermaid sequence diagram, and claims schema.
// Live Generated Auth Protocol Trace
// Protocol: OAuth 2.0 PKCE (RFC 7636)
// Status: Initialized