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GEN4 FCM US B2C API Documentation (Preview)REST Websocket

REST
WebSocket

Reference and Market Data
Account Balance and Positions
Trading

Crypto Spot and Perpetuals Prediction – FCM (US)

Introduction
Reference and Market Data
Account Balance and Positions
Trading

API Doc
REST
Introduction
Change Log

Change Log

Change Log

2026-07-17
- Card Top Up API
2026-03-21
- Initial Version

Breaking Change Schedule

Common API Reference

Change Log