Stax Labs
Stax API: Backtest and Screen From Code | Stax
The Stax API runs the same engine the app uses. Backtest a strategy, screen the universe, optimize, and deploy, all from a few HTTP calls. Live at api.staxlabs.org.
What users get
- Base URL
- api.staxlabs.org
- Auth
- Bearer key
- Speed
- Backtest in seconds
The job it solves
A live REST API to backtest strategies, screen thousands of stocks, optimize, and deploy. Bearer-key auth, tiered limits, ready today.
Built for the actual investing workflow
Stax is strongest when a visitor can move from learning to building to testing without switching tools or losing the original idea.
Run a full backtest from a single request.
Screen thousands of stocks by any metric in under a second.
Optimize and deploy without leaving your code.
Build your own tools on the Stax engine.
How it works
A practical path from an idea to evidence, then from evidence to practice.
- 1
Create a key in your Stax account.
- 2
POST your strategy to the backtest endpoint.
- 3
Screen the universe with the screen endpoint.
- 4
Deploy to paper or live when you are ready.
Live and real, not a waitlist.
The same engine as the app, so numbers match.
Tiered daily limits that scale with your plan.
Learn the concepts behind the tool
Start with a template
Questions people ask
What can the API do?
Backtest, screen, optimize, manage strategies, and deploy to paper or live trading.
How do I authenticate?
With a bearer API key you create in your account. Daily limits scale with your plan.
Ready to use stax api: backtest and screen from code | stax?
Start with a clear idea, test the rules, and keep the risk visible before the decision gets emotional.