# Prediction Market Signals

Prediction market odds, liquidity quality, event coherence and cross-venue gaps from Polymarket and Kalshi public data.

## How to pay

Machine-payable over x402. USDC on: Base (eip155:8453), Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp), Polygon (eip155:137), Arbitrum One (eip155:42161).
No accounts. No API keys. No signup. The paying wallet is the account.

## Machine-readable

- OpenAPI: https://prediction-markets.x402tookit.com/openapi.json
- x402 manifest: https://prediction-markets.x402tookit.com/.well-known/x402
- Catalog (free): https://prediction-markets.x402tookit.com/catalog
- Health (free): https://prediction-markets.x402tookit.com/health
- Uptime (free): https://prediction-markets.x402tookit.com/uptime

## Endpoints (9)

### GET /kalshi-event — $0.02
Kalshi event overview by event ticker: every outcome's yes price and whether exclusive outcomes sum to 100%.
Params: event_ticker: string
Example: https://prediction-markets.x402tookit.com/kalshi-event?event_ticker=KXNEWPOPE-70

### GET /kalshi-market — $0.02
Kalshi market odds by ticker: yes bid/ask, mid, spread, volume, open interest and a liquid/thin verdict.
Params: ticker: string
Example: https://prediction-markets.x402tookit.com/kalshi-market?ticker=KXELONMARS-99

### GET /pm-event-overround — $0.02
Do a Polymarket event's outcome prices add up to 100%? Sums the Yes prices and flags over- or under-round.
Params: slug: string
Example: https://prediction-markets.x402tookit.com/pm-event-overround?slug=will-the-us-confirm-that-aliens-exist-before-2027

### GET /pm-expiring — $0.02
Polymarket markets resolving within 1-168 hours that still have real volume, with current odds and quality.
Params: hours?: integer
Example: https://prediction-markets.x402tookit.com/pm-expiring?hours=48

### GET /pm-kalshi-gap — $0.02
Price gap between a Polymarket market and the Kalshi market you pair it with, with liquidity quality on both.
Params: slug: string, ticker: string, pm_outcome?: integer
Example: https://prediction-markets.x402tookit.com/pm-kalshi-gap?slug=will-the-us-confirm-that-aliens-exist-before-2027-789-924-249&ticker=KXELONMARS-99

### GET /pm-market — $0.02
Polymarket market odds by slug: implied probabilities, spread, volume and a liquid/thin verdict.
Params: slug: string
Example: https://prediction-markets.x402tookit.com/pm-market?slug=will-the-us-confirm-that-aliens-exist-before-2027-789-924-249

### GET /pm-movers — $0.02
Biggest 24-hour odds moves among liquid live Polymarket markets, with direction, size and liquidity quality.
Params: n?: integer
Example: https://prediction-markets.x402tookit.com/pm-movers?n=8

### GET /pm-search — $0.02
Search live Polymarket markets by topic. Returns top matches with implied odds, volume and liquidity quality.
Params: q: string
Example: https://prediction-markets.x402tookit.com/pm-search?q=bitcoin

### GET /pm-trending — $0.02
Most-traded live Polymarket markets in the last 24 hours with odds, 24h price change and liquidity quality.
Params: n?: integer
Example: https://prediction-markets.x402tookit.com/pm-trending?n=10

## Terms

Market-implied odds and screens computed from Polymarket and Kalshi public market data, provided as is, with no warranty of accuracy, timeliness or fitness for a purpose. Not betting, financial, legal or investment advice, and not affiliated with Polymarket, Kalshi or any exchange. Availability of these venues varies by jurisdiction; check the venue's rules before acting.