Fennel API
Build, manage, and trade on your terms.
Route commission-free trades for US-based equity and ETFs using a 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 secure low-latency 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 order routing—or define your own order routing strategy, down to the venue or direct-to-market access.
Modern Tools for Serious Builders.
Real-time market data
Connect instantly & get access to live price data.
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.
