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REST API | American Express
Authorization Service
You can request the authorization service using these decryption methods:
- Cybersourcedecryption method
- Merchant decryption method
This section provides the steps for requesting the authorization service using these
methods, which determine the request fields that are required to request the
authorization service. In addition, different request fields are required to request the
authorization service depending on the type of card used to process the transaction.