Predict

Polymarket prediction markets, prices, trades & whales. 23 pay-per-call predict endpoints for AI agents — keyless, USDC via x402.

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Prediction market $0.05get a signed callback when a Polymarket outcome's implied probability crosses a level.
predict.activity$0.0048
A wallet's Polymarket on-chain activity feed: trades, merges, splits, redeems, conversions and rewards, newest first.
GET /api/predict/activity
predict.crypto-updown$0.0048
Polymarket crypto up-or-down markets — the recurring 'Will <asset> be up or down by <time>?' series for BTC, ETH, SOL, SPX and more (hourly/daily).
GET /api/predict/crypto-updown
predict.events$0.0048
Browse Polymarket events (an event groups related markets — e.g.
GET /api/predict/events
predict.holders$0.0012
Top holders of a Polymarket market, grouped by outcome token (conditionId).
GET /api/predict/holders
predict.kalshi-events$0.0010
Browse Kalshi events (an event groups related markets, e.g.
GET /api/predict/kalshi-events
predict.kalshi-market$0.0010
A single Kalshi market by ticker.
GET /api/predict/kalshi-market
predict.kalshi-markets$0.0010
Browse Kalshi regulated prediction markets.
GET /api/predict/kalshi-markets
predict.kalshi-orderbook$0.0010
Order book for a Kalshi market by ticker: resting yes and no bids with price (dollars) and size (contracts).
GET /api/predict/kalshi-orderbook
predict.kalshi-trades$0.0010
Recent trades on Kalshi, optionally filtered to one market ticker.
GET /api/predict/kalshi-trades
predict.leaderboard$0.0048
Polymarket smart-wallet leaderboard: top traders ranked by realized volume or profit (P&L).
GET /api/predict/leaderboard
predict.limitless-markets$0.0012
Active prediction markets on Limitless Exchange (on-chain, Base; keyless).
GET /api/predict/limitless-markets
predict.market$0.0010
A single Polymarket market by conditionId, slug, or id.
GET /api/predict/market
predict.markets$0.0010
Browse Polymarket prediction markets.
GET /api/predict/markets
predict.matched-pairs$0.0048
Cross-venue equivalent-market pairs for arbitrage / relative-value spotting.
GET /api/predict/matched-pairs
predict.orderbook$0.0010
Full CLOB order book (bids + asks with price and size) for a Polymarket outcome token.
GET /api/predict/orderbook
predict.positions$0.0048
A wallet's open Polymarket positions.
GET /api/predict/positions
predict.price$0.0010
Live best bid, best ask, and midpoint for a Polymarket outcome token (CLOB token id — get it from predict.markets clobTokenIds).
GET /api/predict/price
predict.price-history$0.0020
Time-series price (implied-probability) history for a Polymarket outcome token.
GET /api/predict/price-history
predict.search$0.0048
Cross-venue prediction-market keyword search across Polymarket, Kalshi, and Limitless Exchange in one call.
GET /api/predict/search
predict.sports$0.0048
Sports prediction markets across Polymarket and Kalshi in one call — game lines, futures, and props (NFL/NBA/MLB/NHL/soccer/tennis/etc).
GET /api/predict/sports
predict.trades$0.0010
Recent Polymarket trades.
GET /api/predict/trades
predict.wallet$0.0020
A Polymarket trader's portfolio by wallet address: total portfolio USD value plus open positions (market title, outcome, size, average vs current price, current
GET /api/predict/wallet
predict.whales$0.0020
Polymarket whale radar: the largest recent trades by USD notional across all markets, ranked.
GET /api/predict/whales

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