404canvas

welcome to 404canvas

Two projects so far — an AI overlay you summon with a keyboard shortcut, one built into the browser, one running on the desktop.

Downloads need an account — a name and a password, no email.

projects
polymind

PolyMind

browser extension · chrome, edge, brave

An overlay that opens on top of the page you are already on. Ask a question, read the answer, close it again — no new tab.

shortcut
Alt+Q (⌥Q on Mac)
models
Gemini, Claude, GPT, DeepSeek — via OpenRouter
version
v1.26.2
polymind desktop

PolyMind Desktop

desktop app · windows, macos, linux

The overlay rebuilt to live outside the browser. It waits in the background and opens over whatever window you are in — editor, PDF, spreadsheet. No agent mode: there is no page underneath to fill in.

shortcut
Alt+Q from any app
models
Gemini, Claude, GPT, DeepSeek — via OpenRouter
version
v1.9.0
about

Accounts are a name and a password — no email address. New ones are approved by hand, so there can be a short wait before the downloads open up.

Both projects need an OpenRouter API key of your own. The key stays on your machine; it is never sent here.