[clothridge]

Intrinio (http://intrinio.com/) currently offers the least expensive Real-Time and REST API for US stock prices, AND their customer service chat support is live practically 24/7.

You can access it via WebSocket, or Web API. No other firm currently offers this data via WebSocket which is especially helpful as you only need a few lines of code to implement.

The real-time feeds can be found here: https://intrinio.com/marketplace/data#?category=prices&sub_c...

The REST API for prices would be best in this feed: US Public Company Financials https://intrinio.com/data/company-financials

This blog will tell you everything you need to know to get started using the real-time API: http://blog.intrinio.com/stock-prices-from-intrinio/