Is it possible to use my custom domain for QR codes and Digital Business cards created through the API?

Yes, you can use your own custom domain for QR codes generated via the API. However, this feature is available only with the ULTIMA plan or higher.

To set it up, subscribe to the ULTIMA plan, then configure your custom domain in the White Label settings of your account. Once white labeling is enabled, any QR codes created through the API will automatically use your custom domain.