Prediction Markets API for Fintech & Trading Apps

Public Beta Live
XO Markets - Award: Most Promising Fintech Startup 2025

Embed real-time event markets into your trading platform with one institution-grade API. Politics, finance, sports, and more—global coverage, sub-50ms execution.

Live Prediction Markets

Real-time probability data streaming from global event markets. Trade politics, finance, sports, and more.

Developer-First Prediction Markets API

Built for developer happiness. Our SDKs handle WebSocket subscriptions, order book management, and secure authentication out of the box.

Integrate a fully regulated prediction market trading interface into your existing fintech product in minutes, not months. RESTful endpoints and real-time WebSocket streams.

  • Official Python, TypeScript & C++ SDKs
  • Sub-50ms order execution latency
  • Zero commission on API trades
trade.py
from xo_markets import XO

client = XO.Client('pk_live_8392...')

# 1. Subscribe to US Election market

market = await client.market('us-election-2028')

# 2. Place a limit buy order on "Vance"

order = await market.buy(
    outcome='Vance',
    amount_usd=5000,
    limit_price=0.35,  # 35% probability
    type='GTC'
)

print(f"Order Filled: {order.id} @ {order.avg_price}")

# > Order Filled: ord_992837 @ 0.35
// Response
{
  "id": "ord_992837",
  "client_order_id": "clt_1eebf13e0308",
  "market_id": "us-election-2028",
  "outcome": "Vance",
  "side": "buy",
  "status": "filled",
  "amount_usd": 5000.00,
  "limit_price": 0.35,
  "avg_price": 0.35,
  "filled_at": "PLACEHOLDER_TIMESTAMP",
  "filled_qty": 14285.71,
  "type": "GTC"
}

Enterprise-Grade Security & Compliance

Built for institutional scale with SOC 2 Type II, ISO 27001, and GDPR compliance. Multi-jurisdiction regulatory framework support.

Security certifications: ISO 27001 certified, SOC 2 Type II compliant, GDPR compliant

"Prediction markets are rapidly shedding their image as a fringe curiosity and emerging as a serious new arena in finance. Probably the largest market ever."

— a16z

Frequently Asked Questions

Common questions about integrating the XO Markets API.

How long does it take to integrate?

You can go live within days of having your API key.

What markets are you in?

Global, excluding the US.

Do you offer Sports markets?

No, currently we offer no sports or recreational markets.

Can I create my own market?

Yes, absolutely, we work with partners to create markets and give you the infrastructure to create your own markets.

Read the full documentation