The Stablecoin Payment Gateway. 1% flat. 5 chains. We never hold your money.
Accept USDC and USDT across 5 blockchain networks. 1% flat fee, no rolling reserves, no chargebacks. On-chain settlement direct to your wallet. Funds never touch a PYMSTR balance sheet.
Most "crypto payment processors" inherit the worst parts of the card-rail business model and add a stack of new risks on top. They hold merchant funds in custodial hot wallets, which means an exchange-style breach drains every merchant on the platform at once (CoinsPaid lost $37M to a hack in July 2023, Alphapo $60M the same month). They accept hundreds of tokens, half of which are illiquid altcoins that bounce 10% between checkout and settlement, leaving merchants underpaid. They route customers through generic "pay with any wallet" flows that have no enforcement: a customer trying to pay in USDC on Polygon can accidentally send USDT on Ethereum, lose the funds to a wrong-token transfer, and now it's the merchant's support problem. And the fee model still mirrors the card-processor playbook: headline rate of 1%, but the all-in cost after FX spread, fiat withdrawal fees, monthly minimums, and inactivity charges lands at 2-3.5% in real practice.
PYMSTR is the stablecoin payment gateway that strips this category down to what merchants actually need. We accept exactly two stablecoins: USDC and USDT, both pegged 1:1 to the US dollar, both with combined market caps over $215B and the deepest on-chain liquidity in the market. No altcoins, no volatility. We run on five chains (Ethereum, Base, Polygon, Arbitrum, and BNB Smart Chain), and merchants choose which subset their checkout accepts so customers can't pick a chain that doesn't make sense for them. Payments settle on-chain directly from the customer's wallet to the merchant's wallet in 2-15 seconds depending on the chain. PYMSTR never holds the funds. There is no custodial hot wallet to hack, no rolling reserve to lock against future chargebacks (chargebacks don't exist on-chain), no merchant balance for an exchange-style breach to drain. Our fee is 1% flat, end to end, with no spreads, no withdrawal fees, no monthly minimums, no setup. The headline rate and the all-in cost are the same number.
Three steps, on-chain.
Customer selects stablecoin
Choose USDC or USDT. Enforced payments mean they can only use options you've approved.
Selects chain
Ethereum, Base, Polygon, Arbitrum, or BNB. Your merchant settings control which are available.
Pays exact amount
The exact amount transfers on-chain. No volatility between payment and settlement.
How iGaming operators take stablecoin deposits
For an iGaming operator, a deposit is a player paying through your PYMSTR checkout or payment link. The player chooses USDC or USDT on a network you allow, and the funds land directly in your operator wallet. Settlement is on-chain and fast: roughly 2 seconds on Base, Polygon, and Arbitrum, about 3 on BNB Chain, and around 15 on Ethereum. There is no processor balance in the middle and no multi-day settlement delay.
Enforced payments remove the most common deposit failure. You choose which chains and stablecoins your checkout accepts, and a player can only pick from those, so a deposit can never arrive on a network you do not support. That eliminates wrong-chain transfers and the lost-funds support tickets that come with them.
Once the network confirms, the deposit is final. There is no chargeback flow on the stablecoin rail, so a player cannot reverse a confirmed deposit weeks later the way a card deposit can be disputed, and no rolling reserve is held against your volume. Run it next to your card rail and route the crypto-native share of deposits through it.
Player picks coin and chain
At your checkout or payment link, the player selects USDC or USDT on a network you allow. Anything you have not enabled is not offered.
Player pays
They pay from a wallet created by their normal Google or Apple login, or connect their own. The exact amount, no conversion guesswork.
Funds land in your wallet
The deposit settles on-chain to your operator wallet in seconds and is final. You receive a webhook so your platform can credit the player.
How operators pay players out
The other side of a deposit is a cashout. With PYMSTR Payouts, a player withdrawal is a stablecoin transfer to the player, and you can batch up to 100 of them into a single on-chain transaction. Your platform creates the batch over the API as your withdrawal queue fills up, so cashouts are queued automatically instead of sent one by one.
Nothing moves until a person signs. Creating a payout produces a payout link, and you (or a teammate you hand it to) open it, connect a wallet, review the chain, coin, and total, and approve the batch. The wallet that opens the payout link is the one that signs and pays, usually your own; it does not have to be whoever created the payout, since the API can queue payouts but never move funds, so an automated queue can never pay itself out. The same flow covers affiliate commissions and vendor settlements, not just players.
The batch is atomic and non-custodial. Every player in the batch is paid together or the whole batch reverts, so one bad address cannot leave some players unpaid. Funds move straight from your wallet to the players, with no processor balance in the middle and nothing for a hack to drain. Pricing is 1% flat, charged on top, so players receive the full amount you entered.
Queue the withdrawals
Your platform creates a payout over the API as cashout requests come in, up to 100 players per batch, on one chain and one stablecoin.
A person approves
An authorized team member opens the payout link, reviews the total, and signs once. The API cannot move funds on its own.
Players are paid
One on-chain transaction pays every player at once, all or nothing, and a webhook fires when it completes.
Ethereum
Base
Polygon
Arbitrum
BNB Smart Chain
| Processor | Rate | Architecture | Risk Profile |
|---|---|---|---|
| Traditional card (Nuvei, Worldpay, Paysafe; MCC 7995) | 5-10%+ | Card-rail | 2-3% chargebacks, 5-15% reserves locked |
| CoinsPaid | 0.5-1.5% (2-3.5% all-in) | Custodial | $37M hack July 2023 |
| BitPay | 1-2% + $0.25/tx | Custodial | iGaming excluded under AUP |
| NOWPayments | 0.5-1% | Custodial | Hot-wallet exposure |
| Coinbase Commerce | 1% | Custodial | Hot-wallet exposure |
| PYMSTR | 1% flat | Non-custodial | ★ None. Funds never on PYMSTR balance sheet |
What you get.
Zero Volatility
USDC and USDT are pegged 1:1 to USD. The amount paid is the amount received. Always.
Two Coins, Not 300+
Unlike NOWPayments with 300+ tokens, PYMSTR focuses on the two stablecoins that matter. Less confusion, fewer errors.
No wrong-coin mistakes
Customers can only pay with options you've approved. No wrong-chain, wrong-token, or wrong-amount errors.
Multi-Chain Efficiency
5 chains from $0.01 gas (Polygon) to $10 (Ethereum). Match the chain to the transaction size.