Lightspeed

stocksoptions API key

Professional-grade equities and options via WebSocket API.

Built for Lightspeed's existing active-trader base, connected through Lightspeed Connect — its newer WebSocket API rather than legacy FIX.

Good to know

Lightspeed Connect only launched in late 2024, replacing an older FIX-only setup, so it's the newest connection we offer. Lightspeed's standard account minimums and market-data agreements still apply before you can trade.