Commission-Free Short Selling & More on Alpaca

Hack Financial Systems

Since launching the Alpaca Trading API only 9 months ago, we have had the pleasure of supporting the activity of a growing number of individuals and businesses, from hobbyist coders to hedge funds.

Using our API, you have built beautiful applications and charting tools. You have experimented and refined with our paper trading environment. You have traded all types of strategies, some generating thousands of trades a day, completely commission-free. You have helped each other maximize the power of programming to “hack financial systems” through your active participation in our community.

New Features that Empower Your Trading

Today, we are excited to announce the addition of several new features available through the Alpaca Trading API “Web API v2”.

API v2 - Documentation | Alpaca
Alpaca API lets you build and trade with real-time market data for free.

These include commission-free short selling, margin trading with margin rate of 3.75% amongst the lowest in the industry, pre market & after hours trading, and business account onboarding. These are highly requested features from you, and we are excited to see how you will take advantage of them.

Securities are offered through Alpaca Securities LLC. Important Disclosures (link to

API-first, Developer-first

We are committed to building a software infrastructure that enables all of us to interact with the financial market seamlessly. We have built the building blocks to hack the financial markets — What do YOU plan to do with them?

Make sure to join the community on Slack. You can always find our ongoing open source projects under alpacahq and can submit your requests here.

Alpaca builds a commission free API-first stock brokerage - Alpaca

Technology and services are offered by AlpacaDB, Inc. Brokerage services are provided by Alpaca Securities LLC (, member FINRA/SIPC. Alpaca Securities LLC is a wholly-owned subsidiary of AlpacaDB, Inc.

You can find us @AlpacaHQ, if you use twitter.