Sticker on the front door replaces a smart doorbell. A courier's scan fires a webhook to whatever you have wired it to. Guests enter a PIN to see the guest Wi-Fi or instructions for the key safe.
One QR, two audiences. A courier scan lands on the public 'I'm at your door' page and fires a signed webhook the moment it resolves. Friends with the PIN pass the unlock gate to a private page with the guest Wi-Fi, parking note, or key-safe combination — the private URL is never returned to a phone that has not answered the prompt.
Free tier includes 1 standard QR code. Upgrade to the paid Eternal tier for blockchain permanence and the recovery key.