req.cat is a multi-protocol request catcher for fast collection across HTTP, DNS, SMTP, SSH, SMB, FTP, and TLS-wrapped variants.

Each tenant gets stable targets you can drop into payloads, clients, and callback paths while the live stream view groups related traffic into a single trace.

Use the targets on the left, trigger the interaction you care about, and inspect the capture details below as the service records protocol metadata, auth attempts, and raw payloads. Targets live for 48 hours.