MIDSIG / POST OFFICE PAY WITH CARD
A LITTLE POSTAGE. A BETTER INBOX.

Good mail.
Small change.

A nickel of intention behind every message.
Pick up some stamps. Get back to saying something.

01 Buy a bundle02 Sign your mail03 Make it count

Price: 5¢ per message, per recipient. Card minimum $10.
Pay like a normal checkout. No wallet. No crypto.

YOUR NEXT HELLO STARTS HERE

Pick your postage.

Pay with a card. Send better mail.Sign in, enter your sending domain, pay $10 or $25. Stamps are added automatically.
1 Your stamp book

Pay with a debit or credit card. Minimum $10.

Pay with crypto instead
USDC

Same stamp books. You send USDC yourself. Solana credit is not live yet.

The domain you send from. Entering it here doesn't verify ownership.

200 stamps$10.00
Card processingHandled by Square
Due today$10.00
No wallet needed to try it

No signature. No payment. No surprise approvals.

Loading checkout…

What does one stamp cover?

One authenticated message to one envelope recipient. A message to three recipients uses three stamps. The planned price is 0.05 USDC per stamp, with no bundle discount that weakens the minimum. The payment ledger and paid SMTP enforcement are still being built.

Why buy a book instead of one stamp?

One deposit can fund many messages, spreading transaction costs across your postage. Once implemented, the gateway will debit credits automatically when accepting a valid signed message. You won't need to approve a wallet transaction for every email.

Where will payments go?

These are the proposed public receiving wallets. Direct transfers are not purchases and won't create stamps. Wait for verified live checkout.

Base · USDC0x47cf60BdD877203264921D05CE26F81f6d36Aa3ESolana · USDC token-account owner5S9tyrZwcgV127fEQMzCaBNWmEKz3iUBdASKaurBSGHU

The verifier will accept only the official native USDC token for the selected network. Read the payment integration status →

OPTIONAL · READ-ONLY CONNECTION

Bring your wallet.

Connection shares your public address with this page. This preview cannot request signatures or transactions.

 CHECKOUT PREVIEW · NO FUNDS

One last look.

Here's the purchase you'd approve when payment verification and postage credits are live.

Sending domain
Stamp book
Payment route
Postage value
Network fees
Not quoted in preview
Funds requested now
0 — preview only

Your domain hasn't been verified. No wallet authorization will be requested.

 PREVIEW COMPLETE

That's the whole idea.

Pick. Review. Back to your day.

No money moved. No usable stamps were created.