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Qint’s catalog covers 11 assets. You choose which ones your business accepts (dashboard → onboarding / settings); the buyer chooses among them at checkout. Whatever they pick, you settle in CHF, EUR or USD.

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The catalog

USDT and USDC are multi-network: the checkout shows one row per network variant, and the buyer picks the network. Acceptance is symbol-level on your side — accepting USDT means accepting it on all of its networks.
New merchants accept the default set — USDT, USDC, ETH and BTC — until they opt into more. Additional assets are enabled per symbol in the dashboard.

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How the checkout quotes

  1. The checkout shows your accepted assets as a grid with indicative crypto amounts based on live rates. The rate is network-independent, so a stablecoin’s variants share one indicative amount.
  2. When the buyer selects an asset (and network), the amount is quoted for real and locked, and a deposit address is issued. The buyer must send exactly the quoted crypto amount to that address.
  3. The lock lives inside the payment’s 15-minute window — after expiresAt, an unpaid intent is expired and the address must not be paid.
If the buyer changes their mind and picks a different asset or network, the previous quote and address are cancelled and fresh ones are issued. Re-picking the same asset and network is a no-op.
Amounts are exact-per-quote. A buyer who sends less than the locked amount triggers the underpayment flow; crypto amounts in API and webhook payloads are 8-decimal-place strings (e.g. "49.90000000") to avoid floating-point drift.

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Network identifiers

Where the API exposes a network (chain fields on checkout payloads), it uses these identifiers: ETHEREUM, BITCOIN, SOLANA, TRON, DOGECOIN, CARDANO, XRPL, STELLAR, SUI

API payments

Create intents and read back assetSymbol and cryptoAmount.

Underpayments

Tolerance, review queue, and partial payments.