ASPSPs should conduct stress testing of their API interface as follows:
Environments: Stress testing does not need to take place on the testing facility. However, stress testing should either be conducted on the production interface (and underlying production systems) and/or staging/pre-production systems which have similar infrastructure, so there can be certainty that the test results will represent what will happen in a real-word scenario.
- Prior to application to the NCA for an exemption.
- In the event of any failures or reduction of service levels below those required regarding performance and availability KPIs.
- In the event of any infrastructure or implementation changes (e.g. release of new API versions), which may affect performance.
- In the event of any significant increase in predicted usage volumes.