If you're a software developer, we encourage you to write software using Collective2 infrastructure and APIs. Whether you are interested in building an application for your own private use, or a product or service that you intend to offer to others, we're here to help you with your development effort.
Developer APIs
Collective2 API v3
Includes Signal Entry API, Strategy Access API, Private Platform API, and more. (Learn more)
Other
Submit signals via email
Not really a Developer API, but perhaps useful for certain automation efforts: there is a way to send us signals via a specially formatted email. Due to the slow speed of email, this is obviously not meant for anything but non-urgent signal entry (i.e. end-of-day or once-per-day signals). Learn more
C2 Software Developer Forum
The C2 Software Developer forum is a place where software developers can exchange ideas and ask questions about writing C2-compatible software. (Go to C2 Software Developer Forum)
Older crap you still might want to see:
We'll continue to support your older development efforts that use our earlier APIs. Links to older documentation follow. If you are starting a new development project, please use the newest API (above).
Data Services API version 1 - All functionality in the old C2 Data Services (C2DS) API is now available in the new API v3.