API Overview

Payments Developer Guide
- Recent Revisions to This Document

Introduction to Payments
- Financial Institutions and Payment Networks
- Card Types
- Transaction Types
- Payment Services
- Payment Features
- Testing the Payment Services

Standard Payment Processing
- Basic Authorizations
- Authorizations with Line Items
- Authorizations with Payment Network Tokens
- Authorizations with a Card Verification Number
- Authorizations with Strong Customer Authentication Exemption
- Zero Amount Authorizations
- Pre-Authorizations
- Final Authorization Indicator
- Authorization Reversals
- Sales
- Captures
- Multiple Partial Captures
- Follow-On Credits
- Stand-Alone Credits
- Voids

Debit and Prepaid Card Processing
- Additional Resources for Debit and Prepaid Payments
- Processing Debit and Prepaid Authorizations
- Enabling Debit and Prepaid Partial Authorizations
- Disabling Debit and Prepaid Partial Authorizations

Payer Authentication Processing
- Additional Resources for Payer Authentication
- Providing Payer Authentication Information for Authorization
- Mastercard Identity Check
- Visa Secure

Processing Payments Using Credentials
- Additional Resources for Credentialed Transactions
- Customer-Initiated Transactions with Credentials on File
- Delayed Transaction
- No-Show Transactions
- Reauthorization Transaction
- Resubmission Transaction
- Recurring Payments
- Mastercard Standing Order Payments
- Mastercard Subscription Payments
- Unscheduled COF Payments

Card-Specific Required Field for Processing a Merchant-Initiated Transactions

Discover

The listed card requires an additional field:

subsequentAuthOriginalAmount: Provide the original transaction amount.