Can I add Atome to an existing API-only integration? How long will this process take? 18 February 2022 01:55 Updated Yes, Merchant can add Atome to the existing API-only integration. It will take you about a week or two depending on your existing infrastructure and resources. Related articles Which payment gateways/platforms are you able to integrate with? How do I use Atome if I’m a merchant? Managing Atome Merchant Center How much will it cost me as a merchant? How do you decide the transaction limit for each merchant?