Currently, HKD (Honk Kong Dollar) is not available in the list of currencies for billing (Audience -> Billing -> Settings:Charging & Gateway).

Several clients/prospects are asking to include HKD to the list of supported currencies in 3scale. After a quick search It seems that Honk Kong Dollar is supported by all the payment gateways (Stripe,Ayden and Braintree).

Dev notes

We could have the currencies in a config file. It is usually a very stable list and right now we have it in the code, but this way it could be customizable for on-prem at will. For SaaS, we could use the same list that we have in the code right now.
This way, each customer can have their own list and we do not have to overcomplicate the code.
Another argument in favor of just a simple config file: payment gateways may not even play any role in the process. Providers may issue plans and invoices without PG integration.
It’s important to let the customer knows that enabling a currency that is not supported by the PG they use is on their own risk. Payment transactions will fail.

It’s important to let the customer knows that enabling a currency that is not supported by the PG they use is on their own risk. Payment transactions will fail.