Free beta, open now · US addresses onlyMailKey never sells your data.
Get your key

Your address for people, businesses and AI agents. Always current.

Give out a short key instead of spelling your address. The people, businesses and AI agents you approve get your exact name and current address, and the new one when you move.

Get your key, freeFor business

Where a key does the talking

One record. You decide who holds it.

Your name exactly as you typed it, your address standardized by USPS and kept current, and a list of everyone who holds it.

MAILKEY RECORDACTIVE
Your keyK7M-4QX-9RD8Kilo Seven Mike · Four Quebec X-ray · Nine Romeo Delta Eight
NameExactly as you typed it
AddressStandardized, kept current
Who holds itYou decide, and can revoke

Read it once. Nothing gets spelled.

A rep types the name they think they heard, and the misspelling lives in billing systems for years. Say your key instead, and your exact name and current address arrive on their screen.

On a call · customer service02:14
Can I get your name and mailing address?
My MailKey is K7M, 4QX, 9RD8.
Their screen · previewKEY FOUND
NameJ•••• R••••City[City], [ST] [ZIP]
The rep reads the masked preview back to you to confirm, then claims the full address.

Buy it at the booth. Have it shipped home.

No clipboard, no handwriting to decipher. Say your key over the noise, the seller reads it back, and your shipping address lands on their tablet, spelled right.

K7M, 4QX, 9RD8Kilo, Seven, Mike… got it.

Collect every address with one link.

Wedding hosts chase guests for addresses one text at a time. Send one address request instead. Guests answer with their key, and the addresses you collect stay current when they move.

Address requestOPEN
Our wedding invitations
[request link]Copy link
G[Guest name]Address received
G[Guest name]Address received
G[Guest name]Waiting
G[Guest name]Address received

Your AI assistant gets your address the way a business does.

Only with your approval, kept current when you move, and revocable whenever you choose.

  • Your AI assistant

    Connect an AI assistant that supports MCP and approve it once. It gets your address the way a business does: it is listed in Address Leases, it receives your new address when you move, and you can revoke it at any time. It sees your address book only if you agree to that separately.

  • A business's voice agent

    A business can let its AI phone agent take your key on a call, through the MailKey API. The agent reads back the masked preview, you say yes, and the claim follows the same approval rules as a person at that business.

Update once. Everyone you chose gets it on the day.

  1. DAY 0You enter the new address and the date you move.
  2. CHECKMailKey confirms the USPS version with you.
  3. MOVE DATEEvery holder you approved gets the new address.
  4. AFTERAddress Leases shows who has the new address.

The privacy promise

  • Never soldMailKey never sells your data.
  • Key requiredNobody can look you up without your key.
  • You revokeSee everyone who holds your address. Cut anyone off at any time.
  • EncryptedEvery name and address is encrypted, each person under their own key.

Take addresses over the phone without the typos.

Look up a key, read back the preview, and keep the address current as long as the customer allows. The console is free during the beta.

Open the business console
  • Look upMasked preview to read back to the caller
  • ChangesNew addresses on each customer's move date
  • Returned mailFlag an address that bounced
  • TeamInvite colleagues as owners or members

Get your key in about a minute.

Sign in with a passkey or an email code, enter your name and address, and confirm the USPS version. Your key appears.

Get your key, freeHow it works