Ironically, the hardest business to run on card rails is a crypto exchange.
Fiat-to-crypto exchanges, OTC desks, and crypto brokerage platforms face the tightest card-acquirer scrutiny in fintech. MCC 6051 (quasi-cash) is a categorical decline on most aggregators. The 2023 FTX collapse tightened remaining rails further. Stablecoin-in, stablecoin-out is the native rail — but the fiat on/off ramp is where the friction lives.
Fiat-to-crypto purchases hit the highest-risk quasi-cash classification. Card acquirers either decline the category or apply the harshest reserve tier available.
Signature, Silvergate, and multiple crypto-friendly banks either failed or exited the vertical in 2023. Remaining USD rails apply concentration limits that cap exchange growth.
'I didn't authorize this crypto purchase' disputes are near-impossible to represent. Once the crypto is delivered, it's non-refundable — but the fiat leg gets reversed anyway.
- Stablecoin-in bypasses the fiat on-ramp bottleneck entirely.
- Cash App, Zelle, PayPal cover the fiat leg for retail customers who need one.
- No card-rail chargeback vector on delivered crypto.
- Compliance stack (Chainalysis, Elliptic, TRM Labs) integrates via webhook.
Questions operators in this vertical ask.
The cashier pushes every deposit and withdrawal event to your BSA/AML stack in real time. Suspicious activity monitoring, travel-rule compliance, and SAR filing continue through your existing vendor.
Cash App, Zelle, Apple Pay, Venmo work as USD on-ramps for retail customers. Wire and ACH continue through your existing banking relationships for institutional flow.
It supplements. Most exchanges keep card acceptance for the retail-onboarding leg and use stablecoin for the higher-volume trading and withdrawal flow.
$ contact --vertical crypto-exchange