See every market. Find every edge.

Prediction Markets API for Real-Time Odds & Arbitrage

One unified API for prediction market events. Match identical markets, stream real-time odds, and identify arbitrage across platforms.

Supported markets
Polymarket logoPolymarket
Kalshi logoKalshi

ODDS & ARBITRAGE

Real-Time Odds, Spreads & Signals

Find arbitrage opportunities across prediction markets. Access odds, spreads, and signals in one place.

Discover spreads instantly.
Build on odds with signals and alerts.

Live Cross-Platform Spread

Hybrid response preview

Live

Event

Will the Eagles win the Super Bowl 2026?

arbitrage
Polymarket logoPolymarketYES 0.48NO 0.52
Kalshi logoKalshiYES 0.52NO 0.48

Cross-platform spread: 4.00%

{
  "event": "Will the Eagles win the Super Bowl 2026?",
  "markets": [
    {
      "platform": "Polymarket",
      "yes_odds": 0.48,
      "no_odds": 0.52
    },
    {
      "platform": "Kalshi",
      "yes_odds": 0.52,
      "no_odds": 0.48
    }
  ],
  "yes_price_difference": 0.04,
  "signal": "arbitrage"
}

Unified API Response

Multi-outcome market data

from tpm import Client

client = Client(api_key="YOUR_API_KEY")

event = client.events.get("fed-meeting-apr-2026")
markets = client.markets.list(event_id=event["id"])

print(markets)

Unified response

Multi-outcome event

Fed Meeting — April 2026 Rate Decision

Outcomes

25 bps hike 42%
KalshiKalshi:0.42/PolymarketPolymarket:0.40(+0.02)
No change 38%
KalshiKalshi:0.38/PolymarketPolymarket:0.41(-0.03)
25 bps cut 20%
KalshiKalshi:0.20/PolymarketPolymarket:0.19(+0.01)

UNIFIED API / SDK

One API for Prediction Markets

REST API • WebSockets • SDKs

Integrate once. Access events, odds, and multi-outcome markets across all platforms.

Single schema. No fragmented APIs.

  • Binary and multi-outcome markets
  • Real-time and historical data
  • Cross-platform price comparison
Get API key (free)

No credit card required

View docs →

Event Intelligence

Live

Event

Will Bitcoin exceed $100K by Dec 31, 2026?

Odds

PolymarketPolymarket0.64
KalshiKalshi0.55
Spread:+0.09

Latest News

Fed signals rate pause

Sentiment

Bullish 68% Bearish 32%

Derived Signals

Momentum ↑ across news and odds

Spread widening: +0.09

Sentiment accelerating

Aggregated across markets, news, and derived signals

Intelligence Layer

Event Intelligence for Prediction Markets

Aggregate market data, news, and signals around every event.

News, sentiment, and derived signals in one view.

  • News aggregation by event
  • Sentiment analysis
  • Derived signals (momentum, divergence)

Live Orderbook

Market depth snapshot

Live

Event

Will Bitcoin exceed $100K by Dec 31, 2026?

Bids

PriceSize
Best Bid
0.61120K
0.6098K
0.59140K

Asks

PriceSize
Best Ask
0.63110K
0.6488K
0.65102K

Aggregated across markets, news, and derived signals

WebSocket Streaming

Real-Time Orderbooks via WebSockets

Stream live bids, asks, and trades across markets. No polling required.

Subscribe to one market or many. Track depth and price updates in real time.

  • WebSocket and webhook streams
  • Live orderbook depth
  • Price updates across platforms
Get API key (free)

No credit card required

View docs →