Verification of Payee sits in the payment path, so its behaviour under load directly affects customers. A check that performs well in a quiet demo can behave very differently during a payroll run, a sale day, or a marketing spike. Load testing turns those unknowns into measured expectations.
What to test
- Peak throughput: the highest realistic rate of checks, not the average.
- Latency under load: especially the slow tail (p95, p99), not just the mean.
- Rate-limit behaviour: how your integration handles throttling gracefully.
- Failure handling: that timeouts and errors degrade as designed.
Test the tail, not the average
Average latency hides the slow requests that frustrate users. Watch p95 and p99 under realistic peak load to see what customers actually experience.
Use the sandbox
A good provider offers a sandbox so you can drive realistic volumes without touching production data or live accounts. Use it to validate behaviour at and beyond your expected peak before you go live.
Confidence before go-live
RoxPay's Verification of Payee provides a sandbox and clear throughput characteristics, so you can load test with confidence and size your integration for real peaks.