Docs
Everything that happens between pasting a contract address and a box at your door.
How a shop is built
When you paste a mint we pull three things in parallel. Token metadata (name, symbol, logo, update authority) from Helius DAS. Price, market cap and the deepest pool from Dexscreener, with Jupiter as a price fallback. For pump.fun coins, the creator wallet straight from the bonding curve account on chain.
The art is generated, not uploaded. Each piece is an SVG built from the coin: the logo cropped to a circle, the ticker set in Big Shoulders Display, the contract address broken into four mono lines for the back. The mockup you drag around in the browser and the print file that goes to press come from the same markup, so what you see is what gets printed.
The Chart Tee, the mug and the sticker sheet use 72 hourly candles from GeckoTerminal for the coin's deepest pool. Your order snapshots those candles at checkout and stores them, so the shirt shows the chart at your entry, with a red dot on the last candle.
The rack
The coin's logo, big, on the chest. Contract address down the spine on the back.
Bella + Canvas 3001, 8 colors
Your coin's real hourly candles, frozen the second you pay. Nobody else gets that exact chart.
Bella + Canvas 3001, 5 colors
Heavy blend hoodie. The ticker across the chest in tall letters, CA on the back.
Gildan 18500, 6 colors
A5 kiss-cut sheet. Logo, ticker slaps, a mini chart and the CA for your laptop lid.
Kiss-Cut Sticker Sheet, 1 color
Unstructured six-panel cap. Ticker embroidered front and center.
Yupoong 6245CM, 7 colors
11oz glossy ceramic. Logo on one side, the chart wrapping round to the handle.
White Glossy Mug 11oz, 1 color
Sizing
Tees are Bella + Canvas 3001, a regular unisex fit. Hoodies are Gildan 18500, roomy. If you are between sizes on the tee, size up for a boxier fit. Measurements in inches, laid flat.
Payments
Checkout locks a quote for 30 minutes in SOL (priced from Jupiter) or USDC (exact dollars). The order page shows a Solana Pay transfer request as a QR code and a button that builds the same transfer for a connected wallet.
Every order gets its own reference key: a fresh public key attached to the transfer as a read-only account. Our server looks up that key with getSignaturesForAddress, loads the confirmed transaction, and checks that the treasury balance went up by at least the quoted amount. Only then does the order turn paid. A keeper runs the same check every two minutes, so closing the tab does not lose your order.
Paid after the quote expired? It still counts. We keep checking expired orders for a week and book them the moment the payment shows up.
Creator cut
15% of our margin on every piece accrues to the coin. Margin is the sale price minus what the blank and the print cost us, before shipping. On a $34 logo tee that is $2.37 per shirt.
Who counts as the creator: for pump.fun coins, the creator field on the bonding curve account. For other tokens, the metadata update authority when it is a regular wallet, not a program or a launchpad. Older pump.fun coins and some launchpads do not store a creator; their cut keeps accruing and our team can attach a wallet once the dev proves ownership (sign a message from the deployer wallet and DM us).
To claim, open Creators, sign a free message with the creator wallet, and press Claim. Payouts go out in USDC from the treasury, minimum $1. The creator can also set a community wallet (a DAO, a buyback wallet, a multisig) and the cut pays there instead.
Shipping and returns
Everything is printed to order by our own production team. Production takes 2 to 5 business days, and tracking appears on your order page as soon as the label is made.
Because every piece is made for one person, we do not take returns for size or change of mind. If something arrives misprinted, damaged or wrong, email a photo with your order code within 30 days and we reprint it at no cost.
FAQ
Which coins can I make merch for?+
Any SPL token on Solana with a name and a logo. Paste the mint address and the shop builds from on-chain metadata (Helius DAS) plus market data from Dexscreener. The Chart Tee needs a pool with some trading history.
Is this official merch for the coin?+
No. MERCHMAXX prints community merch for any coin. The creator wallet earns a cut on every sale, which is the closest thing to official we can make it without asking every dev on chain.
How does the creator cut work?+
15% of our margin (sale price minus our print cost) accrues to the coin. For pump.fun coins we read the creator from the bonding curve account. For other tokens we use the metadata update authority when it is a normal wallet. The creator signs in, claims in USDC, or redirects the cut to a community wallet.
How do I pay?+
SOL or USDC on Solana. Checkout locks a price for 30 minutes and gives you a Solana Pay QR code plus a one-tap button for Phantom, Solflare and Backpack. Each order has its own reference key, and our server only marks it paid after it finds that key in a confirmed transaction that sent the right amount to our treasury.
When does it ship?+
Pieces are printed to order by our production team, usually 2 to 5 business days, then shipped with tracking. US delivery is typically 3 to 7 days after that, international 7 to 20.
Can I return it?+
Every piece is printed for you, so we do not take returns for size or change of mind. If it arrives misprinted or damaged, email a photo within 30 days and we reprint it free.
What is the weekly drop?+
A leaderboard of the coins that sold the most pieces since Sunday 00:00 UTC. It resets every week and the top shops get the front page.