Hey developers 👋

Debug requests without the headache

Keeps network, console, and context in one panel, organized, without the noise you don't need to see. When you're stuck, one click sends everything to your AI, ready to paste.

Add to FirefoxAvailable on Mozilla Add-onsAdd to EdgeAvailable on Microsoft Edge Add-onsAdd to OperaAvailable on Opera Add-onsChromeComing soon, blocked in HondurasSafariComing soon
Why

I was tired of piecing bugs together across DevTools tabs

I'd see an error and bounce between Console, Network, and Cookies just to figure out what actually happened, then try to explain all of that to Claude from memory.

So I built 404-AM: everything in one place, laid out so you can see it clearly, and structured so your AI gets the full context of what failed, not half a story.

Star feature

Copy for AI

Something broke? Hit Copy for AI — headers, body, console, secrets masked. One click, ready for your AI.

Built-in

Also packed in

The usual DevTools stuff, but actually nice to use.

Catches everything

Every fetch & XHR, method, status, timing, size. Filter the noise in seconds.

Dig into the details

Headers, bodies, JSON trees. Secrets stay hidden until you say otherwise.

Console + network

Logs and requests side by side, no more jumping between DevTools tabs.

Sort & timeline

Find the slow ones, group by domain, spot patterns fast.

Copy anything

cURL, fetch, HAR, JSON, whatever you need to share or save.