Fennel API
Build, manage, and trade on your terms.
Commission-free trading, direct market access, and programmable infrastructure—built on top of the existing Fennel platform. Download the Fennel app, open an account, and start building.
Trusted Infrastructure
Commission-Free Trading Without Selling Your Order Flow
Trade stocks in real time with zero commissions using Fennel’s fast and secure API.
FINRA & SIPC Member
Our broker-dealer is a member of FINRA & SIPC. Securities in your account offered by Apex are protected up to $500,000 (including up to $250,000 for cash claims). Learn more at sipc.org.
Detailed Docs
Clear docs. Clean code. Everything you need to build scalable trading solutions.
Custom Order Routing:
Take Control of Your
Trades
With Fennel’s Custom Order Routing, you control how and where your trades are executed. Stick with our default routing—or define your own strategy, down to the venue or direct-to-market access.
Modern Tools for Serious Builders.
Fast, Real-Time Execution
Trade instantly. Go live in seconds.
Security in Mind
Account access powered by OAuth technology.
Modern REST API
Clear endpoints. Easy requests. No headaches.
Get Started Now
Join a growing network of developers, fintech builders, and product teams using Fennel to create the next generation of investing tools. Download the app, and open an account today.
