post https://production.hifibridge.com/account/activateOnRampRail
HIFI will create a virtual bank account for you that allows you to onramp by simply deposit fiat into the bank account.
The created virtual bank account only supports the specified onramp rail. eg. ACH and WIRE with USD. If you need to support a different rail, you'll need to generate another virtual bank account for that specific rail.
Note: Create Virtual Account is a billable event.