Introduction

Dot Prediction is two things in one API: a normalized view of every major prediction market, and a runtime for agents that read, write, and trade against it. One key. One schema. Three venues today — more on the roadmap.

What you get

Markets — list, search, filter across Kalshi, Polymarket, and Limitless.
Orderbooks — real-time bid/ask depth over REST or websocket.
History — OHLC candles and the full trade tape at configurable intervals.
Analytics — trending, categories, platform stats, whales, top traders.
Portfolio — positions, PnL, trades, and account activity per venue.
Orders — place, list, and cancel on behalf of a user with their vaulted credentials.

Venues

Platform	Markets	Orderbook	Trades	History
Kalshi	✓	✓	✓	✓
Polymarket	✓	✓	✓	✓
Limitless	✓	✓	—	✓

Manifold, Futuur, and PredictIt are on the roadmap — live coverage rolls out through Q3 and Q4 2026.

Start in three calls

curl https://api.dotprediction.io/v1/api/markets?provider=polymarket&limit=5 \
  -H "X-API-Key: $DP_API_KEY"

import requests

r = requests.get(
    "https://api.dotprediction.io/v1/api/markets",
    params={"provider": "polymarket", "limit": 5},
    headers={"X-API-Key": os.environ["DP_API_KEY"]},
)
r.raise_for_status()
for m in r.json()["data"]:
    print(m["title"], "→", m["yes_price"])

const res = await fetch(
  "https://api.dotprediction.io/v1/api/markets?provider=polymarket&limit=5",
  { headers: { "X-API-Key": process.env.DP_API_KEY } },
);
const { data } = await res.json();

Get an API key

Head to dotprediction.com, sign up, and create a key from the dashboard. The Free tier gives you 1,000 requests per day — enough to build against. Dig in with the Quickstart or browse the API reference.

Overview

Guides

API Reference

What you get

Venues

Start in three calls

Get an API key

​What you get

​Venues

​Start in three calls

​Get an API key

What you get

Venues

Start in three calls

Get an API key