xint-oauth-callback-port-is-3333-not-8477

xint’s built-in OAuth PKCE flow starts a local server on port 3333 for the callback, not port 8477 as might be assumed from other tools. Configuring the X Developer Portal app with http://127.0.0.1:8477/callback causes an immediate callback mismatch error. The correct callback URL to register in the X Developer Portal is http://127.0.0.1:3333/callback.