Prediction Markets

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

Pass exchange (or aliases like poly for Polymarket) on most list endpoints:

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 one market by ticker / condition id or by 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

Full historical coverage for trades and candlesticks:

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

Overview

Token Data

Security & Analytics

Wallet & Portfolio

PnL V2

Live Streaming

Solana RPC

Trading

Prediction Markets

First request

Exchanges

Discover markets

Historical data

Live market state (REST)

Crypto up/down (Polymarket)

Wallet analytics (Polymarket)

Batch helpers

Next steps

Product overview

Datastream guide

​First request

​Exchanges

​Discover markets

​Historical data

​Live market state (REST)

​Crypto up/down (Polymarket)

​Wallet analytics (Polymarket)

​Batch helpers

​Next steps

Product overview

Datastream guide

First request

Exchanges

Discover markets

Historical data

Live market state (REST)

Crypto up/down (Polymarket)

Wallet analytics (Polymarket)

Batch helpers

Next steps