From the beta notes for TWS 9.04: Alternative Access for API API customers can now elect to run the IB Gateway access method instead of TWS to connect their API with the IB trading system. The gateway supports the same functionality as TWS, but does not include a graphical user interface and consequently uses approximately 40% less system resources. API users can elect to run TWS when they want to view and manage API orders, or the IB Gateway when they have no need for the TWS interface. Access the IB Gateway the same way you would the TWS; download and run a standalone version if you prefer to upgrade versions manually, or use the browser-based version from the Login menu to run the current production version. Go to: http://www.interactivebrokers.com/en/p.php?f=tws&p=n&ib_entity=llc Click on beta notes. I'm surprised they aren't announcing this.