The IEX top of book quote feed (TOPS) is a direct data feed product provided by IEX. TOPS provides IEX's aggregated best quoted bid and offer position in real-time for all securities on IEX's displayed limit order book. The IEX Real-Time Security Tracker allows developers and analysts to pay just for the stocks they want to cover in real-time and includes the option to redistribute that data to end users.
If you have an Intrinio account you can view your API Keys here.
For a quick-start guide to our API, please see the tutorial.