Is the IBIS 'Research Essentials' Subscription Bundle available via API?

At the moment it is not possible to use the TWS API with IBIS.

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What does the message "Bond Restricted: Calculation Type Not Supported" mean?
Are stock loan borrow rates available via the API?
Can I play an audible alert in Excel API?
Can I subscribe to research data with an IBKR Lite account with IBKR Singapore?