Prediction Hunt logoPrediction Hunt
Live
API Documentation

Unify Fragmented Prediction Markets

Pull standardized market data from Polymarket, Kalshi, PredictIt, ProphetX, Opinion, and Predict.fun with a single API call.

View Plans →

By continuing to use or access PredictionHunt's API, you are agreeing to be bound to our API Terms of Service.

As seen onFinancial TimesAs seen onPolymark.etAs seen on theGuardianUsed by builders and traders in our2K+ Discord community
GET /v2/events + GET /v2/matching-markets + GET /v2/arb
{
"id": "evt_pres_2028",
"title": "2028 Presidential Election",
"platforms_matched": 5,
"arbitrage_available": true
}

Authentication & Base URL

All v2 requests hit a single base URL and authenticate via the X-API-Key header.

# Base URL
https://www.predictionhunt.com/api/v2
# Example request — list events
$ curl -H "X-API-Key: YOUR_API_KEY" https://www.predictionhunt.com/api/v2/events

Real-Time Streaming

Stream live prediction market data over a persistent WebSocket connection — prices, arbitrage alerts, +EV signals, orderbook depth, and market lifecycle events.

PricesDev+

Real-time bid/ask/last updates as markets move.

ArbitragePro+

Cross-platform arbitrage opportunity alerts.

Expected ValuePro+

+EV signal alerts for subscribed match groups.

OrderbookPro+

Depth changes with bid/ask levels per market.

LifecyclePro+

New markets, resolutions, match group events.

WebSocket Documentation

Pricing

Start free. Scale as you grow.

Free

The perfect starting place to experiment with live prediction data. No credit card required.

$0/month
  • 1 req/sec rate limit
  • 1,000 requests/month
  • 10 matched market requests/mo
  • Unlimited sports matching
  • Unlimited historical data
  • Trading API / SDK access
  • MCP server (Claude, Cursor)
  • Community support (Discord)

Dev

For developers shipping production-grade apps that require higher limits and private support.

$49/month
  • 20 req/sec rate limit
  • 1M requests/month
  • WebSocket API: prices channel
  • WS limits: 3 conns · 50 subs/conn · 25/channel
  • 100 matched market requests/mo
  • Unlimited sports matching
  • 500 arb requests/month
  • 500 +EV requests/month
  • Unlimited historical data
  • Trading API / SDK access
  • MCP server (Claude, Cursor)
  • Private Discord Channel
  • Free founder consult
Start Building →
Most Popular

Pro

Engineered for professional traders and scale-ups requiring high-frequency execution and alpha signals.

$249/month
  • 100 req/sec rate limit
  • 5M requests/month
  • WebSocket API: all channels
  • WS limits: 10 conns · 200 subs/conn · 100/channel
  • 1,000 matched market requests/mo
  • Unlimited sports matching
  • 5,000 arb requests/month
  • 5,000 +EV requests/month
  • Unlimited historical data
  • Trading API / SDK access
  • MCP server (Claude, Cursor)
  • Private Discord Channel
  • Priority support (7 days/week)
  • Free founder consult
Get Pro →

Enterprise

Custom infrastructure and dedicated support for institutions with unlimited volume requirements.

Custom
  • Custom rate limits
  • Unlimited requests
  • WebSocket API: all channels
  • WS limits: 50 conns · 1000 subs/conn · 500/channel
  • Unlimited matched markets
  • Unlimited sports matching
  • Unlimited historical data
  • All endpoints incl. Arb & EV
  • Trading API / SDK access
  • MCP server (Claude, Cursor)
  • Private Discord Channel
  • Dedicated support & onboarding
  • Custom SLAs
  • Free founder consult
Book a Call →

Questions? Email api@predictionhunt.com

Friends of Prediction Hunt

Earn 20% Lifetime Revenue Share

Refer paid subscribers. Get paid as long as they stay active.

Give 10% Off

Share a custom coupon code with your audience to make your pitch an easy “yes.”

Keep 20% Monthly

Recurring commissions on every single referral, for life.

Become an Affiliate →

No caps on earnings · Payouts via Stripe