Identify the operation
Associate each event with the stable object identifier in the API contract.
Webhooks
Follow the event.
Reconcile the outcome.
Use financial events to keep your own system informed. Plan for verification, repeat delivery and reconciliation against the underlying operation.
Concept documentation. Request the versioned production specification before implementation.
Keep events tied to their source.
Verify the delivery
Implement the authentication or signature-verification method specified for webhook delivery. No header names or signing algorithm are defined on this page.
Handle repeated events
Use the documented event identifiers and replay semantics to prevent duplicate effects in your system.
Design for delayed or repeated delivery.
The production specification must define event types, ordering, acknowledgements, retries and replay. Do not assume delivery order or an exactly-once guarantee from this overview.
Process the state
Distinguish an operation that is still processing from its final outcome.
Recover deliberately
Follow the documented retry and replay behavior after an interruption.
Reconcile
Check your records against the source operation when an event is missing, delayed or unexpected.