← All practicals

Prove an email is yours

Sign up with a one-time code — no link, no password.

1. 1

   Enter your email and pass the bot check.

   Turnstile blocks scripted signups before we ever send a code or spend an email from the shared daily cap.

2. 2

   Receive a 6-digit code and type it back.

   A code (not a link) proves you control the mailbox; middleboxes that pre-fetch links can’t burn a code they never see.

3. 3

   You’re verified — a session cookie is set.

   The code is single-use and SHA-256-hashed at rest, so the database never holds a code anyone could replay.