What online brokers offer APIs?

Posted by Wilco on Stack Overflow See other posts from Stack Overflow or by Wilco
Published on 2008-09-12T15:34:58Z Indexed on 2010/12/29 19:53 UTC
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api

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stocks

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trading

So I'm getting really sick of E*TRADE and, being a developer, would love to find an online broker that offers an API. It would be great to be able to write my own trading tools, and maybe even modify existing ones.

Based on my research so far, I've only found one option. Interactive Brokers offers a multi-language API (Java/C++/ActiveX/DDE) and has some fairly decent commission rates to boot. I want to make sure there aren't any other options out there I should be considering. Any ideas?

Update: Based on answers so far, here's a quick list...

Interactive Brokers
- Java
- C++
- ActiveX
- DDE for Excel
Pinnacle Trading
- C++
- Perl
- VB.NET
- Excel
MB Trading

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