Processing API Guide

Getting started

• Base URL

  The address your payment links are built on.

• Parameters for Populating Fields or Requesting Data

  Pre-fill payment page fields and pass your own data through the transaction.

Customizing the payment page

• Displaying Price Points

  Control which price points appear and how they are shown.

• Showing Other Languages

  Display the payment page in a consumer's language.

• Dynamic Multi-Currency

  Show prices in the consumer's local currency.

• Payment Options

  Choose which payment methods appear on your payment page.

Postbacks and transaction data

• Postbacks

  Receive transaction notifications at your own endpoint.

• Postback Parameters

  Every field Segpay sends in a postback.

• Transaction Postback Matrix

  Read the trantype, action, stage, and approved parameters together to identify what a transaction actually was.

• Postback and SRS Data Availability

  Which data is available through postbacks, through SRS, or both.

Testing and troubleshooting

• Testing Payments

  Run test transactions before going live.

• Error Codes

  What each error code means and how to resolve it.