Running Transactions

This API is a RESTful API that is secured with TLS version 1.2.

Integrate with this API to do the following:

• Run a card sale
• Run an independent refund

1. Read Before You Begin.
2. Program your POS to:
   •     Create the headers to authenticate your requests.
   •     Create requests for the types of transactions you want to run.
   •     Handle the responses.
3. Test your integration.

Send the current version number of the API as the value for the X-GP-Version parameter in the header of your requests.

The current version of the API is 2021-04-08.