You need a free account to share prototypes. Building locally never needs an account — only sharing does.

Sign in

npx proto login

This opens your browser to sign in. Use email (you get a magic link) or Google. Once you’re signed in, you’ll see a confirmation in the browser:

You're signed in
Head back to your terminal — you can close this tab.

Back in the terminal:

You're signed in.

That’s it. You don’t usually run npx proto login directly — npx proto share and npx proto record sign you in automatically the first time you use them.

Manage your shares

Everything lives at prototo.app/account :

• Your published prototypes (links are permanent)
• Your Studio recordings
• Your current plan, and the option to upgrade

Sign out

Prototo stores your sign-in in a single file on your Mac. To sign out, delete it:

rm ~/.prototo/api-token.json