Prediction Hunt: what it does, what it costs, where it stops

What it does

Markets are grouped by category, sports, elections, politics, entertainment, economics and crypto, with each event showing its price on every venue that lists it. An arbitrage page matches equivalent markets and flags combinations where buying YES on one venue and NO on another costs less than $1, ranked by return on investment.

Around the comparison sit a smart-money feed, a paper-trading simulator, fee and EV calculators, and a news feed that showed 2,193+ articles when checked.

• Nine venues named on the homepage, seven in the API docs
• Arbitrage scanner ranked by ROI where combined price is under $1
• 23 REST endpoints on /api/v2 with X-API-Key auth
• Seven WebSocket channels: prices, smart money, fade finder, arbitrage, expected value, orderbook, lifecycle
• MCP server on every tier

Pricing

The website is free. The API has four tiers. Free: $0, 1 request per second, 1,000 requests per month, no WebSocket connections, Discord support. Dev: $49 per month, 20 requests per second, 1M requests per month, 500 signals per month, 3 WebSocket connections.

Pro: $249 per month, 100 requests per second, 5M requests per month, 5,000 signals, 10 WebSocket connections and all channels. Enterprise: custom price, unlimited quota, 50 WebSocket connections.

Venues and data

The API docs say it aggregates Polymarket, Kalshi, PredictIt, ProphetX, Opinion, Predict.fun and Polymarket US. Crypto.com and OG.com appear on the homepage list but not in the API venue list, so treat those two as web-only.

The arbitrage page tells you to account for fees, spread depth and withdrawal times on each platform, and does not state that displayed returns are net of fees. No refresh interval is published.

Where it falls short

Fee treatment on the arb page is left to you. A sub-$1 combined price on Kalshi plus Polymarket is gross, and Kalshi taker fees can eat a 2 cent gap.

It compares and it flags. Executing means opening Kalshi and Polymarket separately, or a cross-venue terminal. The site promotes venue sign-up offers, so it earns from referrals.

Who should use it

Anyone who wants the widest free venue comparison, and developers who want a no-card API key with 1,000 calls a month to prototype against before paying $49.