In theory a business doesn’t need a processor to accept stablecoins. You put a USDC address on the invoice and wait. In practice that breaks within a week.
Where it breaks
Two customers each send 49.99 USDC. Which order does each payment belong to? A third sends 49.90. A fourth sends the right amount on the wrong chain. When is a payment final enough to ship against? How do you refund someone whose address you never stored? And how does your accountant reconcile four hundred anonymous transfers at the end of the quarter?
None of these are blockchain problems. They are the same problems card processors solve every day, and they don’t go away because the money moves on-chain.
What a processor takes on
- Fixing the terms of each payment up front, so every transfer matches exactly one order or invoice.
- Building the transactions the customer’s wallet has to sign, including approvals and token swaps.
- Watching the chain, waiting for enough confirmations and telling your system when a payment is final.
- Refunds, payouts, multi-chain support and protection against paying twice.
- Hosted checkout pages and payment links for teams without developers.
- Exports, invoices and reconciliation reports for the finance team.
Custodial or non-custodial
Processors split on one design choice: whether the money passes through their hands. A custodial processor receives the payment into its own wallets, credits your balance and pays you out later, often converted into euros or dollars. That is convenient, but it means a company holds your funds and can delay or freeze them.
A non-custodial processor never holds the money. The payment goes from the customer’s wallet to yours, and the processor only coordinates it. Rayl works this way.
The trade-off
A non-custodial processor leaves the last mile to you. You receive USDC or EURC in your wallet, and if you need bank money you convert it yourself through an exchange or an off-ramp provider.
