Better yet, patch your proxy to reject that header entirely outside of localhost.

The note suggests this method is "better" than other temporary fixes, likely for the following reasons: Non-Intrusive:

When you add the XDevAccess header to your request, you must simultaneously log a Ticket to Jack (your team lead or ticketing system):

This "note" represents a common real-world security mistake: (CWE-489).

A note (in the MIDI or OSC sense, or an internal session note in a DAW/patchbay) acts as a flag that tells JACK’s connection management system to ignore a specific port or connection for a defined period.

Add the following header to your requests: x-dev-access: yes

This blog post explores the "Note Jack" challenge—a common web exploitation scenario in platforms like PicoCTF—where a developer's secret allows for a temporary authentication bypass. Bypassing Authentication with X-Dev-Access: yes