AsyncAPI channel · Fiserv
· Fiserv Payment Events
/webhooks/transactions
Receives transaction lifecycle event notifications including authorizations, captures, refunds, voids, and declines.
Channel address
/webhooks/transactions
Operations
publish
receiveTransactionEvent
Receive transaction event notification
Messages
TransactionAuthorized
Notification sent when a transaction is successfully authorized.
Content-Type:
application/jsonTransactionCaptured
Notification sent when an authorized transaction is captured for settlement.
Content-Type:
application/jsonTransactionRefunded
Notification sent when a transaction refund is processed.
Content-Type:
application/jsonTransactionVoided
Notification sent when a transaction is voided.
Content-Type:
application/jsonTransactionDeclined
Notification sent when a transaction is declined.
Content-Type:
application/jsonAbout AsyncAPI
The AsyncAPI specification describes event-driven APIs the way OpenAPI describes request/response APIs. A channel is the named pipe — a webhook URL, a Kafka topic, a WebSocket route, an MQTT subject — that producers and consumers publish or subscribe to. Each channel carries one or more messages with structured payloads, and an operation declares whether a given party sends or receives on that channel.
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