Option trading API other than Interactive Brokers

External question — Quantitative Finance Stack Exchange Author: AnalyticsBuilder Original post: https://quant.stackexchange.com/questions/447 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'm looking for an options broker that provides an execution API . I'd like to ideally test on a papertrading version of it before connecting to a real execution engine. I know IB offers that, but they require a funded account with 10K min balance. I was hoping for no more than 2-3K. I would appreciate your suggestions

External answer — Quantitative Finance Stack Exchange Author: John Jelinek Original post: https://quant.stackexchange.com/a/8010 License: CC BY-SA 3.0 — https://creativecommons.org/licenses/by-sa/3.0/ Adaptation: HTML converted to plain text; contact email addresses removed. Have you seen TradeStation's WebAPI? Check it out here: http://tradestation.github.io/webapi-docs/