On-ramp reliability for stablecoin-to-fiat; a hard lesson learned

Was working with a smaller fintech client who wanted to integrate $USDC payments for their SaaS subscriptions. The idea was simple enough: accept USDC, settle daily to fiat to cover operational costs. We picked an on-ramp provider that seemed promising, good API docs, competitive rates. Everything tested fine in sandbox.

First week in production, we had a pretty significant spike in subscriptions. Great, right? Except the on-ramp provider’s KYC automation for incoming corporate funds flagged nearly 30% of the daily settlements for manual review. This wasn't their usual user-level KYC, but for the actual settlement to the client's bank account. This bottleneck caused cash flow issues for the client almost immediately. Their fiat payouts were delayed, impacting payroll and vendor payments. It was a scramble to re-route funds and manually verify transactions, a huge time sink. The lesson was stark: 'on-ramp' isn't just about getting into crypto; it’s critically about getting out reliably, especially at scale. We'd focused too much on the integration ease and not enough on the actual backend liquidity and regulatory robustness of the fiat off-ramp side for larger, regular corporate settlements. Ended up having to shift providers, which was a costly and reputation-damaging pivot.