One market in full
API · /polymarket-api
Polymarket API
healthy
3,929 Subscribers
Live prediction-market data from Polymarket, the largest real-money prediction market, via its public Gamma API. On Polymarket people trade shares in the outcome of real-world events, so each market's price is a live, money-backed probability. Get the most active markets, each with its outcomes and their implied probabilities, the best bid and ask, the traded volume and the liquidity. Read one market in full, including its description and resolution date. Pull the biggest events — an event groups related markets, like a championship with one market per team — with their total volume and market count. Get one event with every sub-market and its current probability, the whole field at a glance. Live, no key, nothing stored. Distinct from sports-betting-odds and price-feed APIs — this is Polymarket's money-backed event probabilities and its markets. Perfect for forecasting, trading-signal, news and analytics apps.
api.oanor.com/polymarket-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 159 ms
- Server probes · 24h
- Subscribers
- 3,929
- active
- Total calls
- 80
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 9,000 calls / month
- 3 requests / second
- Hard cap (429 above quota, no overage)
- 9k calls/month
- 3 req/sec
- Markets + market + events + event
- No credit card
Starter
€10.00 /month
- 158,000 calls / month
- 6 requests / second
- Hard cap (429 above quota, no overage)
- 158k calls/month
- 6 req/sec
- Email support
Pro
€28.00 /month
- 890,000 calls / month
- 15 requests / second
- Hard cap (429 above quota, no overage)
- 890k calls/month
- 15 req/sec
- Priority support
Business
€67.00 /month
- 4,850,000 calls / month
- 40 requests / second
- Hard cap (429 above quota, no overage)
- 4.85M calls/month
- 40 req/sec
- Dedicated SLA
Built by
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Live data for SX Bet, the on-chain sports prediction & betting exchange on SX Network, with no key. List the active sports-betting markets (moneyline, spread, total) with their two named outcomes, teams, league, sport and game time; get the supported sports; the active leagues with event counts; and the active fixtures (upcoming games) for any league. The peer-to-peer sports-prediction layer for odds dashboards, fixture monitors and sports-data apps — distinct from Polymarket, Kalshi and Limitless. Covers 29 sports across 100+ live markets.
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Limitless Prediction Market API
Live data for Limitless Exchange, the on-chain prediction market on Base, with no key. List the active markets with each market's title, live YES/NO implied-probability prices (0–1), traded volume, deadline and category tags; pull a single-market detail by slug; and get the full tag list. Prices are the live market-implied odds for each binary outcome, settled in USDC — distinct from Polymarket and Kalshi. Ideal for odds dashboards, event monitors and crypto-native sentiment analytics across 900+ live markets.
api.oanor.com/limitless-api
Futuur Prediction Markets API
Live prices from Futuur, a global prediction market where users trade on the outcome of real-world events across crypto, politics, sports, science and economics — in both real money (USDC) and play money — served from the public Futuur API, no key, nothing stored. Each market asks a question (for example "Which price will Bitcoin hit in 2026?") and holds two or more outcomes whose price, between 0 and 1, is the market-implied probability of that outcome — an outcome trading at 0.46 means the market prices a 46% chance. The markets endpoint lists markets, filterable by category and search term, each with its outcomes and prices. The market endpoint returns a single market with every outcome's real-money and play-money price (and implied probability) plus its category, status and close date. The categories endpoint lists the topic categories from Bitcoin to elections to sports. Read what a worldwide crowd is pricing in for the future, as live JSON. This is the global prediction-market / event-probability cut — distinct from the US-politics-only (PredictIt) and crypto-only (Polymarket) prediction markets and the price and FX APIs in the catalogue.
api.oanor.com/futuur-api
PredictIt Political Markets API
Live prices from PredictIt, the real-money political prediction market where traders buy and sell shares in the outcome of US elections, economic events and policy questions — served from PredictIt's public market-data feed, no key, nothing stored. Each market asks a question (for example "Which party will control the House?" or "Who will win the 2028 presidential election?") and holds one or more yes/no contracts whose price, between 0 and 1 US dollar, is the market-implied probability of that outcome — a contract trading at 0.27 means the market prices a 27% chance. The markets endpoint lists every open market with its question and contract count. The market endpoint returns a single market with every contract — last trade price, best buy and sell yes/no quotes, last close — and the implied probability. The search endpoint finds markets by keyword (president, Senate, Fed, shutdown). Read what bettors really think will happen, as live JSON. This is the political prediction-market / event-odds cut — distinct from the crypto prediction markets (Polymarket) and the play-money markets in the catalogue.
api.oanor.com/predictit-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Polymarket API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Polymarket API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Polymarket API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Polymarket API cost?
Polymarket API has a free tier with 100 calls / month. Paid plans start at €10.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Polymarket API GDPR-compliant?
All requests to Polymarket API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/polymarket-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/polymarket-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/polymarket-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/polymarket-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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