Stripe's API dictates the cadence. Senrok engineers enforce deterministic reconciliation between webhook payloads and internal state.
Senrok's architecture treats every Stripe webhook as an idempotent event. Webhooks arrive with duplicate detection via Stripe's `Idempotency-Key` header; we maintain a secondary idempotency layer in our database to guarantee exactly-once processing.
Rate limits are critical: Stripe allows 100 read requests per second per live API key. Senrok designs systems with a local token bucket that paces API calls, reserving headroom for webhook-triggered fetches. When the limit approaches, we queue non-urgent syncs and prioritize payment confirmations.
Data sync uses cursor-based pagination with `ending_before` and `starting_after` parameters. After a webhook, we validate the current state by fetching only the affected resource. Full reconciliation runs nightly via a batch job using Stripe's `List` endpoints, with backoff on `429` responses.
Stripe API keys are scoped to the minimal operations required. Senrok enforces a per-service key: one read-only key for reconciliation workers, one write key for charge operations, and a restricted key for webhook endpoints that only reads event data.
Webhook signing is mandatory. Senrok validates each payload using the `stripe-signature` header and the endpoint secret. We reject unsigned requests at the edge, before handing off to the processing queue.
Network segmentation isolates the batch sync worker from production traffic. It runs in a separate VPC with an egress-only gateway to Stripe's API, and IAM roles rotate keys automatically every 90 days.
We store the idempotency key in a distributed cache with a TTL matching Stripe's window (24h). If the same key appears again, the event is dropped. For charges, we verify the payment intent status before creating a charge; if it's already `succeeded`, we skip.
Senrok's sync workers use exponential backoff (base 2 seconds, cap 5 minutes) with jitter. Webhooks that fail retrieval are retried from our internal queue for up to 48 hours. If the outage persists, we fall back to a manual reconciliation script triggered by an SRE alert.
We implement a local token bucket that starts with 80 tokens and refills at 80 tokens/second. This leaves headroom for bursts. The batch reconciliation worker runs with a separate API key and a lower throttle to avoid interfering with live webhook processing.
Engineering services
Operational Automation · Stripe Payments is the kind of workflow we build as an AI agent system: deterministic checks, human checkpoints, and an audit trail operators can trust. We start from your real process boundaries and ship software that holds up in production.
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