We need a OneZero FIX API session, is this possible?

Yes, our interface is certified with OneZero as an external data provider. This feature, however, requires an additional subscription on a yearly billing period. If you're interested in subscribing to this, please follow these steps:

Submit a ticket via the support page (https://support.coinapi.io/hc/en-us/requests/new), indicating that you're interested in subscribing. After submitting the ticket, we will send you a separate invoice for the subscription fee.

Once the invoice is paid, CoinAPI will need you to whitelist your IPs with OneZero support. We will need you to provide us with the SocketConnectHost, SocketConnectPort, SenderCompID, and TargetCompID to their gateway.