...
| Option | Details |
|---|---|
| Callback URL | You must set this URL as your API Callback URL under Settings > Integration within your Google Checkout account. |
| Merchant ID | This is the Merchant ID provided by Google Checkout. |
| Merchant Key | This is the Merchant Key provided by Google Checkout. |
| Callback Key | This is used to enhance security and verify transactions from Google Checkout are legitimate. Anything can be entered. |
| Developer Mode | If selected, transaction will be posted to Google Checkout's Sandbox environment. Only enable if you are testing with a sandbox account. |
| Accepted Currencies | GBP, USD |
...