I Tested the Mentary AI Demo's "0 bytes transmitted" Claim. It Holds Up — Here's What I Checked.

Every local-AI product page I land on makes the same four promises:

"no external API calls"

"no telemetry"

"100% local processing"

"zero network activity"

Usually one of them is copy-paste decoration. So I don't read the marketing — I read the page's JavaScript and then test it with the network tab open.

The page this time is Mentary AI , a self-contained local AI model, $299.99 . The claim I picked apart is the demo banner: "100% Local processing — zero network activity."

Step 1 — Static read of every network primitive

The demo is one inline script. I pulled it and grepped for every way a browser can talk to the outside:

# every outbound primitive that exists in a page grep -oE 'fetch\(|XMLHttpRequest|navigator\.sendBeacon|WebSocket|new EventSource|import\(' demo.js

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Exit fullscreen mode

Result: zero matches. No fetch , no XHR, no beacon, no websocket, no dynamic import() .…