7. Performance & uptime

7.1 What is the expected response time for a typical request?

• Asynchronous acceptance (default): a few seconds. The refund keeps processing in the background; track it via webhooks or polling.
• Synchronous quotes (Sync: true): block while the PSS is consulted in real time: typically 5–8 seconds, up to 25–45 seconds under PSS load. There is a hard 3-minute timeout on Sync: true calls (the actual worst case is PSS-dependent). If the call times out, don't treat it as failed; fall back to the webhook/async flow to get the result (see Webhooks).

7.2 What retry policy should I implement?

Retry only network errors and HTTP 5xx, with exponential backoff. Never retry business rejections; a REJECTED decision won't change on retry. Deal Engine already retries transient PSS failures internally (up to 2 retries).

7.3 Do you guarantee an uptime?

Our standard uptime is 99.9%.

7.4 How can I monitor API health and uptime?

Status page: status.deal-engine.com.