Collect Bitcoin Stamps

For: a collector with a supported wallet. Goal: own a specific stamp, having paid a known price. Chain and network: Bitcoin mainnet. Version: continuous.

Safety: a stamp purchase does not pass through any StampDEX-controlled address. The stamp and the payment change hands in one confirmed Bitcoin transaction. See Where your funds are.

Prerequisites

• A supported wallet with enough BTC for the dispenser price and the network fee. Dispenser buying has been run end to end through Universe Wallet and UniSat.
• Nothing else. Browsing needs no wallet.

Finding stamps

The stamps gallery. Collections are what you browse; the stamp detail names the transaction behind each piece.Historical production screen, 2026-09-02 · app 38bc2a0 · dark desktop

stampdex.fun/stamps has four ways in:

• The index: every stamp, newest first, with fast thumbnails.
• Collections: curated sets with supply, owners, listings, and floor.
• Listings and offers: what is for sale right now.
• Search: by stamp number, collection, or text.

Judging a stamp

A stamp page shows the facts that matter before a purchase:

• The artwork, rendered from the exact bytes on the Bitcoin chain.
• The identity: stamp number, Counterparty asset id, creator address, transaction hash, file hash, and file size.
• Supply, and whether issuance is locked. A locked stamp with supply 1 is one of one, forever.
• Open and closed dispensers with their prices.

Nobody can swap the image after the fact. The file hash proves it.

Steps to buy

1. Open the stamp page and find an open dispenser. StampDEX shows the cheapest open dispenser with stock remaining.
2. Check the price. The dispenser’s asking rate is what you pay per unit, plus the Bitcoin network fee. There is no StampDEX service fee on a stamp purchase.
3. Review the transaction. StampDEX composes the dispense through Counterparty and converts it into a PSBT, showing the price, the dispenser address, and the fee.
4. Sign in your wallet. See Review a PSBT before signing.
5. Wait for a block. When the transaction confirms, Counterparty dispenses the stamp to your address.

Expected result

The stamp appears in your portfolio, and the dispenser’s remaining count drops by what you bought.

How to verify

curl "https://stamp.api.bitcoinuniverse.io/api/v1/stamps/1472320/dispensers"

And take the transaction id to any block explorer.

Common failure states

You see	What happened	What to do
“You cannot buy from your own dispenser”	The dispenser is yours	Nothing to do
“Dispenser is no longer open”	It was closed between the page loading and your click	Reload and pick another
“Dispenser has no stamps remaining”	Somebody bought the last one	Reload and pick another
“Dispenser only has N stamp(s) remaining”	You asked for more than it holds	Lower the quantity
“Dispenser price is unavailable”	The dispenser record has no readable rate	Do not guess a price. Pick another dispenser
No signable transaction, with a warning instead	The input data needed to describe the transaction could not be recovered	This is deliberate: a transaction your wallet could not inspect is not offered. Retry later

Recovery path

Because nothing is escrowed by StampDEX, a stamp purchase that does not complete leaves you exactly where you started: the transaction either confirms or it does not. A transaction stuck in the mempool at a low fee rate can be nudged; see Recovery.

Costs

The dispenser’s asking price plus the Bitcoin network fee. Browsing costs nothing. See Fees.

Related

• Bitcoin Stamps
• List and unlist a stamp
• Asset identity