#idempotency

Stripe webhooks and idempotency

Stripe will retry every webhook at least once. Network blips, slow processing, a bad 5xx — all of them trigger another delivery. If you double-grant credits or double-send the "Welcome" email because two copies of the same event arrived, that's your bug, not Stripe's. event.id starts with evt and never changes across retries. Store it. On receipt, check…