2xx fast, dedupes by top-level event id, offloads slow reconciliation, ignores redelivery,
and changes business state only on confirmed events. The public contract exposes no signature;
authenticity is established by reconciling against the API.
Guide: Webhooks Overview · Payment events ·
Subscription events · Transfer events ·
Retries & reconciliation
Webhook delivery is inbound, so there is no OpenAPI operation to reference.
By flow
Webhooks Examples
Runnable webhook handlers per language for the transaction, subscription and transfer event families.
Working code for the Webhooks flow: real handlers for the three current envelope families. Every handler
responds