Which brokers offer a Python stock trading API?

External question — Quantitative Finance Stack Exchange Author: Victor Original post: https://quant.stackexchange.com/questions/7240 License: CC BY-SA 3.0 — https://creativecommons.org/licenses/by-sa/3.0/ Adaptation: HTML converted to plain text; contact email addresses removed. I would like to automate my trading strategies. My strategies are not high-frequency and are written in Python. I have a trading account in Interactive Brokers, and I know some non-official Python libraries (such as ibPy and swigPy ) that are an interface to the Java API and are not officially supported. Is there another broker that has a better stock trading API for Python? Inspired by Which brokers offer a .NET stock trading API? .

External answer — Quantitative Finance Stack Exchange Author: John Jelinek Original post: https://quant.stackexchange.com/a/8009 License: CC BY-SA 3.0 — https://creativecommons.org/licenses/by-sa/3.0/ Adaptation: HTML converted to plain text; contact email addresses removed. TradeStation offers python support via their WebAPI. Check it out here: http://tradestation.github.io/webapi-docs/

External answer — Quantitative Finance Stack Exchange Author: Dan Dunn Original post: https://quant.stackexchange.com/a/8033 License: CC BY-SA 3.0 — https://creativecommons.org/licenses/by-sa/3.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Check out Quantopian . It's all in Python. You can backtest and paper trade your algo for free. We do live trading by hooking your algorithm to your Interactive Brokers account.