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IEX Developer Platform

The reliable, enterprise API that powers IEX. Free for everyone.

☞ ☞ ☞ By using the IEX API, you agree to our terms. ☜ ☜ ☜

API documentation

The IEX API 1.0 offers free access to our DEEP, TOPS, market, stock, and stats data using JSON or websockets. The IEX API 1.0 provides any individual or academic, public or private institution looking to develop applications that require stock market data to access near real-time quote and trade data for all stocks trading on IEX. As America's newest stock exchange, IEX trades U.S. equity securities, including exchange-traded funds (ETFs).

Frequently asked questions

What is the cost?

Free.

Is the API reliable?

Very reliable. We use the API to run our own applications.

Do I need paperwork?

None. No paperwork, no login.

Can I redistribute your data?

Yes. For free.

Is the data real time?

Yes.

Are there request limits?

No limits. We throttle requests per IP, but you should get over 100 per second.

Do you support pushing data?

Yes. WebSockets. SSE on the way.

What if I need a new feature?

Check out our roadmap. If you don't see what you need, you can request a feature on our GitHub page.

Why does the API seem to not be responding?

While we strive for 100% uptime, there are times when an outage may occur. Check our twitter status account (@IEXStatus) for updates.

Still have questions?

Community issues and questions can be found on our IEX-API GitHub page. This allows everyone to benefit from your question. If you still need to talk to us directly, our email is api@iextrading.com.