Register Processor Webhook ( DEPRECATED )

This Endpoint is deprecated. Deprecated APIs that are no longer supported and should be removed from your integration. Please use the Stable version for your integration.* Once registered, the webhook will be triggered by the GrailPay whenever a relevant event occurs, such as a transaction started, completed or failed. The webhook will then send a notification to the configured endpoint, which can be processed by the client application to perform additional actions or update relevant data.