# API Reference
source: https://developer.mastercard.com/transaction-notifications/documentation/api-reference/index.md

* [Transaction Notifications Service API](https://developer.mastercard.com/transaction-notifications/documentation/api-reference/inbound/index.md)
* [Transaction Notifications Webhook API](https://developer.mastercard.com/transaction-notifications/documentation/api-reference/transaction-notification-webhook/index.md)

Note: Cardholder consent is required to access real-time transaction data. You can collect cardholder consent using our Consent APIs or Consent UI. Refer to [Consent Management \& Enrollment](https://developer.mastercard.com/consent-management/documentation/api-reference/) for details.