Query Kalshi and Polymarket market data

Use the Prediction Markets API for Kalshi and Polymarket data. Start by finding a market and its exchange-specific ID, then request history, prices, books, or wallet analytics.

Public Beta — Unified Kalshi + Polymarket market data with full history. Join Discord for support.

Base URL: https://prediction-market-api.solanatracker.io
Auth: x-api-key: YOUR_API_KEY (same Data API key)
Realtime: Datastream prediction rooms

First request

curl "https://prediction-market-api.solanatracker.io/v1/markets/trending?limit=5" \
  -H "x-api-key: YOUR_API_KEY"

const res = await fetch(
  "https://prediction-market-api.solanatracker.io/v1/markets/trending?limit=5",
  { headers: { "x-api-key": "YOUR_API_KEY" } }
);
const data = await res.json();
console.log(data);

import requests

res = requests.get(
    "https://prediction-market-api.solanatracker.io/v1/markets/trending",
    params={"limit": 5},
    headers={"x-api-key": "YOUR_API_KEY"},
)
print(res.json())

Exchanges

Set exchange on endpoints that support it. poly is an alias for polymarket.

Value	Platform
`kalshi`	Kalshi
`polymarket` / `poly`	Polymarket
omit	Both (where supported)

Discover markets

Endpoint	Use for
`GET /v1/markets/trending`	Hot markets
`GET /v1/markets/new`	Recently listed
`GET /v1/markets/search`	Text by text
`GET /v1/browse`	Browse / filter
`GET /v1/events`	Event groupings with nested markets
`GET /v1/categories`, `/v1/series`, `/v1/sports`	Taxonomy

curl "https://prediction-market-api.solanatracker.io/v1/markets/search?q=bitcoin&exchange=polymarket" \
  -H "x-api-key: YOUR_API_KEY"

Fetch a single market with the identifier expected by its exchange, or use a market slug:

curl "https://prediction-market-api.solanatracker.io/v1/markets/{ticker}" \
  -H "x-api-key: YOUR_API_KEY"

curl "https://prediction-market-api.solanatracker.io/v1/markets/slug/{slug}" \
  -H "x-api-key: YOUR_API_KEY"

Historical data

Use these endpoints for historical trades and candles:

Endpoint	Returns
`GET /v1/markets/{ticker}/trades`	Trade tape for one market
`GET /v1/markets/trades`	Cross-market trades
`GET /v1/markets/{ticker}/candlesticks`	OHLCV for one market
`GET /v1/events/{event_id}/candlesticks`	Event-level candles
`GET /v1/markets/candlesticks/batch`	Batch candles

curl "https://prediction-market-api.solanatracker.io/v1/markets/{ticker}/candlesticks?interval=1h" \
  -H "x-api-key: YOUR_API_KEY"

Live market state (REST)

Endpoint	Returns
`GET /v1/markets/{ticker}/price`	Latest price
`GET /v1/markets/{ticker}/midpoint`	Mid
`GET /v1/markets/{ticker}/spread`	Spread
`GET /v1/markets/{ticker}/orderbook`	Full book
`GET /v1/markets/{ticker}/quote`	Size-aware VWAP ladder
`GET /v1/markets/books`	Batch books

For continuous updates, subscribe on Datastream instead of polling — see the realtime guide.

Crypto up/down (polymarket)

Endpoint	Returns
`GET /v1/crypto/events`	Active / recent crypto windows
`GET /v1/crypto/price`	Live underlying
`GET /v1/crypto/price-history`	Historical underlying
`GET /v1/events/{event_id}/crypto`	Price-to-beat / final for a window
`GET /v1/crypto/traders`	Window traders

Underlying Chainlink ticks also stream on pm:crypto:{asset} rooms. Outcome chance uses market price rooms (pm:market:polymarket:{tokenId}:prices).

Wallet analytics (polymarket)

Kalshi has no public wallets. Polymarket account endpoints use an Ethereum address:

Endpoint	Returns
`GET /v1/accounts/{address}/overview`	Summary
`GET /v1/accounts/{address}/positions`	Open positions
`GET /v1/accounts/{address}/closed-positions`	Closed / resolved
`GET /v1/accounts/{address}/pnl`	FIFO PnL
`GET /v1/accounts/{address}/pnl/chart`	PnL chart
`GET /v1/accounts/{address}/trades`	Fills
`GET /v1/accounts/{address}/activity`	Ledger activity

Leaderboards: GET /v1/leaderboard/pnl, GET /v1/leaderboard/traders, plus event-scoped variants under /v1/events/{event_id}/....

Batch helpers

Endpoint	Notes
`GET` / `POST /v1/markets/batch`	Many markets in one call
`GET /v1/events/batch`	Many events
`GET /v1/markets/candlesticks/batch`	Many candle series
`GET /v1/markets/books`	Many orderbooks

Start here

Token data

Wallets and PnL

Live data

Pump.fun

Prediction markets

Trading and RPC

Query Kalshi and Polymarket market data

First request

Exchanges

Discover markets

Historical data

Live market state (REST)

Crypto up/down (polymarket)

Wallet analytics (polymarket)

Batch helpers

Next steps

Product overview

Live market data

​First request

​Exchanges

​Discover markets

​Historical data

​Live market state (REST)

​Crypto up/down (polymarket)

​Wallet analytics (polymarket)

​Batch helpers

​Next steps

Product overview

Live market data

First request

Exchanges

Discover markets

Historical data

Live market state (REST)

Crypto up/down (polymarket)

Wallet analytics (polymarket)

Batch helpers

Next steps