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Crypto payment webhook reliability

Webhook delivery is the part of crypto payments that merchants notice only when something breaks. A reliable integration assumes events can be late, duplicated, retried, or missed, and still keeps fulfillment tied to durable payment state.

Acknowledge fast, process safely

The webhook endpoint should validate the signature, store the event, and return a success response quickly. Slow business logic belongs after the event is durably recorded so retries do not turn one payment update into several conflicting attempts.

Deduplicate by event and payment

Store the webhook event ID, invoice ID, payment ID, status, and received timestamp before side effects. If the same event arrives again, the handler should recognize it and skip duplicate fulfillment.

Use polling as a fallback

A webhook is notification, not the only source of operational truth. If a merchant misses a delivery or needs to rebuild state, the invoice status endpoint should let the merchant poll the current state without replaying money movement.

What SwapSS Pay should make crawlable

The public docs should show signature verification, retry expectations, duplicate handling, status polling, and a short recovery checklist. Those are the details developers search before choosing a crypto payment gateway.