Subscribe only to event types you actually use, starting with checkout.session.completed, charge.succeeded, charge.refunded, dispute.created, payout.paid, and balance.available. Keep handlers small and purpose-driven. Log minimal, structured metadata for traceability. Sampling is for analytics, not ingestion, so capture everything first. This deliberate scope limits noise and sharpens your understanding of each financial state transition.
Implement idempotency by keying upserts on Stripe object IDs and event IDs. Persist processed event IDs in a fast lookup store to prevent double handling under retries. Prefer deterministic merges over blind inserts. When uncertain, write once, enrich later. These guardrails keep totals accurate even when the network is flaky and Stripe understandably resends notifications.
Plan for bursts around launches, promotions, and holidays. Use lightweight endpoints, offload work to queues, and fan out transformations. Monitor latency, error rates, and dead-letter volumes. Keep Zapier tasks lean by delegating heavy processing to a serverless function when necessary. With graceful degradation, you preserve correctness while safeguarding downstream dashboards from stalling.