1. Go to Accounts & Setup, click on Merchant and Get Merchat ID from there 

2. Go to Accounts & Setup, click on API Tokens and Get the tokens from there

3. Go to Accounts & Setup, click on Hosted Checkout:

- Enter https://domain.com/index.php?option=com_eventbooking&task=payment_confirm&payment_method=os_clover_hosted_checkout into Webhook URL. Of course replace https://domain.com with URL of your site.
- Get Signing Secret and enter it into Signing Secret parameter of the payment plugin