xint-oauth-callback-port-3333-must-match-developer-portal

xint’s OAuth PKCE flow uses port 3333 by default (http://127.0.0.1:3333/callback). The X Developer Portal app’s Callback URI must exactly match this value — any other port (e.g., 8477) causes a ‘This app requires authenticated clients’ redirect error. Always set callback to http://127.0.0.1:3333/callback when configuring the X app.