Does Polymarket have a public API, and is it free?

Yes. Polymarket publishes its own API (REST, WebSocket, GraphQL). Reading public market data is free and needs no API key. Its rate limits and sign-in methods are in the table on this page.

Does Kalshi have a public API, and is it free?

Yes. Kalshi publishes its own API (REST, WebSocket, MCP). Reading public market data is free and needs no API key. Its rate limits and sign-in methods are in the table on this page.

Where can I get historical prediction market data?

42 of the APIs here offer historical data, but only 5 state an exact start date; the earliest is Probalytics, from 2 October 2020. Use the "Historical data" filter to see them all.

Which prediction market data providers have a free tier?

27 of the independent providers state a free tier or free use: 0xArchive, Adanos Software, Adjacent, Bravado, DepthFeed, KalshiSpy and 21 more. Limits differ; each row gives them.

How much does prediction market data cost?

The cheapest published plans range from $10 a month (outcometick) to $200 a month (Prediction Labs). What each plan includes differs, so compare the data and history columns too.

Which prediction market APIs work with AI agents?

24 offer an MCP server that AI assistants can call directly: Kalshi, Limitless, Hunch, 0xArchive, Adjacent, Bravado and 18 more.

Prediction market APIs compared

The markets' own APIs, the data providers built on top of them and the open-source clients, side by side: what data each one gives, how far back it goes, how it is delivered and what it costs. Every fact comes from the provider's own documentation, pricing page or repository, read on 6 November 2026.

markets with their own API: 26; markets with their own API
independent data providers: 42; independent data providers
with a free tier: 41; with a free tier
with historical data: 42; with historical data

MarketAny Polymarket 56 Kalshi 33 Limitless 10 Predict.fun 9 Opinion 8 Hyperliquid 5 Myriad 5 Manifold 4 Novig 4

NeedsAnything Free tier Historical data WebSocket MCP for AI agents Places orders Bulk files

The markets' own APIs

Run by the exchange itself. Usually free to read, with a key or a wallet signature to trade. Open a row for sign-in, rate limits and links.

Official prediction market APIs
Market	Prices	Order books	Trades	History	Wallets	Trading	Delivery	Free	Paid from
Polymarket	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocketGraphQL	Yes	–
RTDS price feeds shut down on 30 November 2026; Polymarket's guide moves them to PolyBolt.
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST WebSocket GraphQL SDKs: Python, TypeScript, Rust Markets covered Polymarket Sign-in none for public market data; API key with HMAC for private CLOB requests; wallet signature to derive keys and sign orders Free use Yes. Public market-data access without API key; IP/endpoint limits apply. No API subscription price stated; trading fees separate. Rate limits IP sliding windows: general 15,000 requests/10s; Gamma general 4,000/10s, markets 300/10s, events 500/10s; Data v2 general 800/10s, trades 300/10s, positions and prices-history 200/10s; CLOB general 9,000/10s, book/price 1,500/10s, prices-history 1,000/10s. POST /order burst 5,000/10s, sustained 120,000/10min. Separate per-signer trading token buckets also apply. Cheapest paid plan Not stated History from Not stated Links Documentation PricingChecked 6 November 2026
Polymarket US	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocket	Yes	–
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST WebSocket SDKs: Python, TypeScript Markets covered Polymarket US Sign-in none for public gateway market data; API key with Ed25519 signed requests for trading, portfolio and WebSocket Free use Yes. Public gateway requires no key; numeric public-gateway limit not separately stated in the rate-limit page. Retail API general limit 25 requests/second. Rate limits Retail general 25 requests/second/IP/Cloudflare location; combo/RFQ creation shared 1/second; quote create/delete 100/second each; RFQ reads 1/second per listed endpoint. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Kalshi	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocketMCP	Yes	–
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST WebSocket MCP SDKs: Python, TypeScript Markets covered Kalshi Sign-in none for public REST and MCP market reads; API key with RSA-PSS or Ed25519 signature for authenticated API requests; OAuth for MCP account/alerts Free use Yes. Public REST market data without authentication. Basic account tier: 200 read tokens/second, 100 write tokens/second; most requests cost 10 tokens. API subscription price not published. Rate limits Predictions read/write token budgets per second: Basic 200/100; Advanced 300/300; Expert 600/600; Premier 1,200/1,200; Paragon 2,400/2,400; Prime 4,800/4,800; Prestige 12,000/9,600. Most requests cost 10 tokens. Basic/Advanced read and above-Basic write capacities are 3x refill; others 1x. Separate balance bucket 1 request/second Basic/Advanced, 5/second higher. Shared Predictions/Perps WebSocket connections: 200 Basic/Advanced/Expert, 500 Premier, 750 Paragon, 1,000 Prime/Prestige. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Limitless	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocketMCP	Yes	–
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST WebSocket MCP SDKs: TypeScript, Python, Go, Rust Markets covered Limitless Sign-in none for public market browsing/orderbooks per API reference; scoped token with HMAC-SHA256 for private requests; wallet EIP-712 order signature; OAuth for MCP Free use Yes. Public endpoints accessible without authentication; personal trading-scope tokens self-serve, no application. Subscription price and numeric limits not stated. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Manifoldbeta	Prices: yes	Order books: not stated	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTFiles	Yes	Contact sales
Data Markets Prices Trades Price history Wallets Resolutions Trading Delivery REST bulk files (JSON) Markets covered Manifold Sign-in none for public reads; API key or Firebase JWT for account/write endpoints Free use Yes. 500 requests/minute/IP. Free historical dumps non-commercial only; linked dumps dated July 2024. Trading uses Manifold play money. Rate limits 500 requests/minute/IP; multiple IPs may not be used to circumvent limit. Cheapest paid plan Contact sales History from Not stated Links Documentation PricingChecked 6 November 2026
Myriad	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocket	Yes	–
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST WebSocket SDKs: JavaScript Markets covered Myriad Sign-in none for most public reads; wallet SIWE session JWT or API key plus HMAC for private endpoints; EIP-712 order signature Free use Yes. Public reads: 30 requests/10 seconds/IP; authenticated 200 requests/second/IP and/or key. Separate order placement 200 orders/10 seconds/trader. Rate limits Unauthenticated 30 requests/10s/IP; authenticated 200 requests/second/IP and/or key; placement 200 orders/10s/trader shared across single/bulk. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Opinion	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocket	Yes	–
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST WebSocket SDKs: Python, TypeScript Markets covered Opinion Sign-in none for public OpenAPI data; API key for private endpoints/WebSocket; wallet signature to create key and authorize trading Free use Yes. Public data 5 requests/second/IP; authenticated 15 requests/second/API consumer. No paid API tariff stated. Rate limits Public 5 requests/second/IP; authenticated 15 requests/second/API consumer. Separate rate-limit page only states 15/second. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Novig	Prices: yes	Order books: yes	Trades: yes	History: not stated	Wallets: yes	Trading: yes	RESTWebSocket	?	–
Data Markets Prices Order books Trades Wallets Resolutions Trading Delivery REST WebSocket Markets covered Novig Sign-in API key identifier plus signed requests (Ed25519 or P-256), management and trading keys separate Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Smarkets	Prices: yes	Order books: yes	Trades: yes	History: not stated	Wallets: yes	Trading: yes	REST	No	£250 once
Data Markets Prices Order books Trades Wallets Trading Delivery REST Markets covered Smarkets Sign-in approved verified account; login/session token for authenticated trading API Free use No. £250 one-time administration fee for activation; fully registered/verified Smarkets account and application approval required. Rate limits Default 1,200 requests/60 seconds/account across endpoints, shared with website/apps; certain endpoints have stricter limits. Individually agreed usage restrictions also apply. Cheapest paid plan £250 once. API activation administration fee; trading commissions and any further pre-agreed usage fees are separate. History from Not stated Links Documentation PricingChecked 6 November 2026
Predict.fun	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocket	Yes	–
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST WebSocket SDKs: TypeScript, Python Markets covered Predict.fun Sign-in API key for every mainnet request; wallet signature/JWT for wallet operations. Testnet no key. Free use Yes. Keyless testnet: 500 trading-route requests/minute and 240/minute elsewhere per IP. Mainnet keys start at 500 trading/minute, 120 search/minute, 250 other/minute; fee for keys not stated. Rate limits New app shared across keys: trading routes 500 requests/minute; search 120/minute; other 250/minute. Order placement/removal additionally 40/second. Legacy keys/testnet: 500 trading/minute, 240 others/minute. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Problyx	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	REST	Yes	Contact sales
Data Markets Prices Resolutions Delivery REST Markets covered Problyx Sign-in none; optional API key (X-API-Key) Free use Yes. Evaluation tier: anonymous 10 requests/minute/IP, keyed 30/minute/key; up to 5 active keys/account. Rate limits Anonymous 10 requests/minute/IP; API key 30/minute/key; commercial/higher volume by agreement. Cheapest paid plan Contact sales History from Not stated Links DocumentationChecked 6 November 2026
Trepa	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: yes	Trading: yes	REST	?	–
Data Markets Prices Wallets Resolutions Trading Delivery REST SDKs: TypeScript Markets covered Trepa Sign-in API key exchanged for session cookies; embedded-wallet key signs on-chain transactions Free use Not stated Rate limits Per IP: default 420 requests/minute; auth 15/endpoint/minute; demo 30/endpoint/minute; streak summary 60/minute; streak pool details 180/minute; RPC WebSocket upgrades 30/minute; create/submit transactions 10/endpoint/minute; withdrawals 20/endpoint/24h. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Duel Duck	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: yes	Trading: yes	REST	?	–
Data Markets Prices Wallets Resolutions Trading Delivery REST Markets covered Duel Duck Sign-in Not stated Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Hunch	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: yes	Trading: yes	RESTMCPSSE	Yes	–
Data Markets Prices Wallets Resolutions Trading Delivery REST MCP SSE SDKs: TypeScript, Python Markets covered Hunch Sign-in wallet-signed USDC authorization/x402 for betting; keyless public agent reads Free use Yes. Keyless public discovery, research and quotes; simulated bets cost $0. Numeric request quota not stated. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
PnP	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: yes		?	–
Data Markets Prices Resolutions Trading Delivery Not statedSDKs: TypeScript Markets covered PNP Exchange Sign-in Solana wallet signature for on-chain SDK actions Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
ForecastEx	Prices: yes	Order books: not stated	Trades: not stated	History: yes	Wallets: not stated	Trading: not stated	Files	?	–
Data Markets Prices Price history Delivery bulk files (CSV) Markets covered ForecastEx Sign-in Not stated Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Overtime	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: yes	Trading: yes	REST	?	–
Data Markets Prices Wallets Resolutions Signals Trading Delivery REST Markets covered Overtime Sign-in approved API key (x-api-key); wallet signature for on-chain AMM transactions Free use Not stated Rate limits Protected markets route: pre-match 1 request/league/5 seconds; live 1 request/all leagues/2 seconds. Excessive use can disable key. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Zeitgeistbeta	Prices: yes	Order books: not stated	Trades: not stated	History: yes	Wallets: yes	Trading: yes	GraphQL	?	–
Data Markets Prices Price history Wallets Resolutions Trading Delivery GraphQL SDKs: TypeScript Markets covered Zeitgeist Sign-in wallet signer for chain transactions; public indexer examples show no authentication Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Augur	Prices: not stated	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: yes		Yes	–
Data Markets Trading Delivery Not statedSDKs: TypeScript Markets covered Augur Sign-in Ethereum wallet/node access for on-chain protocol interactions; hosted credential scheme not stated Free use Yes. Repository describes protocol as free public open-source software; underlying chain fees apply. No hosted request quota stated. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Hyperliquid	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocket	Yes	–
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST WebSocket SDKs: Python Markets covered Hyperliquid Sign-in none for public info; wallet signature for exchange actions Free use Yes. Public info access; outcome-market trading fees currently zero for initial testing, separate builder fees can apply. REST weighted budget and address limits apply. Rate limits REST aggregate 1,200 weight/minute/IP. l2Book/allMids and listed state queries weight 2, most other info weight 20. 10 WebSocket connections/IP, 30 new/minute, 1,000 subscriptions, 2,000 sent messages/minute, 100 inflight posts. Exchange actions also address-volume-limited with initial 10,000-request buffer. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Metaculus API	Prices: not stated	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	RESTFiles	?	Contact sales
Data Markets Resolutions Signals Delivery REST bulk files (ZIP of CSV) Markets covered Metaculus Sign-in API token (Authorization: Token) Free use Not stated Rate limits Not stated Cheapest paid plan Contact sales History from Not stated Links DocumentationChecked 6 November 2026
Futuur	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	REST	?	–
Data Markets Prices Order books Trades Price history Wallets Resolutions Trading Delivery REST Markets covered Futuur Sign-in none for listed public reads; API key, timestamp and HMAC for account/private actions Free use Not stated Rate limits HMAC-authenticated account: 2,000 requests/minute and 1,000,000/day across endpoints in UTC fixed windows; write actions have stricter dedicated limits. Duplicate same POST within 1 second rejected. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Gemini	Prices: yes	Order books: yes	Trades: yes	History: not stated	Wallets: yes	Trading: yes	RESTWebSocket	Yes	–
Data Markets Prices Order books Trades Wallets Resolutions Trading Delivery REST WebSocket SDKs: TypeScript Markets covered Gemini Sign-in none for public event/volume endpoints; API key with HMAC payload signing or OAuth for private prediction-market actions Free use Yes. Public unauthenticated data endpoints. General Gemini public API 120 requests/minute; private 600/minute; prediction-specific paid API tariff not stated. Rate limits General Gemini API: public 120 requests/minute (recommended <=1/second); private 600/minute (recommended <=5/second). Five extra requests may queue on burst; stricter per-endpoint controls apply. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
SX Bet	Prices: yes	Order books: yes	Trades: yes	History: not stated	Wallets: yes	Trading: yes	RESTWebSocket	Yes	–
Data Markets Prices Order books Trades Wallets Resolutions Trading Delivery REST WebSocket Markets covered SX Bet Sign-in none for public reads; API key (x-sx-api-key) and EOA EIP-712 signatures for authenticated V3 orders Free use Yes. Public market read endpoints; combined markets/sports budget 500 requests/60 seconds/IP. API access subscription price not stated. Rate limits Per API key/route: GET orders 1,200/60s; book snapshot 27,500/300s; fills/balance 300/60s; proxy 120/60s; multisig 60/60s. Public best odds 5,500/60s; metadata 500/60s; trades 200/60s. Markets/sports combined 500/60s/IP; global unauthenticated edge bucket 35,000/10min. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Seer	Prices: yes	Order books: not stated	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTGraphQL	?	–
Data Markets Prices Trades Price history Wallets Resolutions Trading Delivery REST GraphQL SDKs: TypeScript Markets covered Seer Sign-in none stated for public subgraph/API reads; wallet signature for on-chain trading Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
ProphetX	Prices: yes	Order books: yes	Trades: yes	History: not stated	Wallets: yes	Trading: yes	RESTWebSocket	?	–
Data Markets Prices Order books Trades Wallets Resolutions Trading Delivery REST WebSocket Markets covered ProphetX Sign-in Trading API access key/secret exchanged for sessions; Market Data API affiliate key in Authorization header (no Bearer) Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026

Data providers

Independent services that collect, clean and resell market data, often across several exchanges and further back than the exchanges keep. Open a row for what each plan includes.

Prediction market data providers
Provider	Prices	Order books	Trades	History	Wallets	Trading	Delivery	Free	Paid from
0xArchiveHyperliquid	Prices: yes	Order books: yes	Trades: yes	History: yeswith books	Wallets: not stated	Trading: not stated	RESTWebSocketMCPFiles	Yes	$49 a month
Data Markets Prices Order books Trades Price history Order-book history Delivery REST WebSocket MCP bulk files (Parquet) SDKs: Python, TypeScript, Rust Markets covered Hyperliquid Sign-in API key for REST, WebSocket and SDKs; OAuth for MCP Free use Yes. 50,000 credits/month; 15 requests/second; 3 concurrent queries; rolling 30-day history and maximum 30-day query/replay span; 1 key; 10 WebSocket subscriptions, 2 connections; 10x replay. Rate limits Free 15; Build 50; Pro 150; Scale 500 requests/second. Enterprise starts at 1,000 requests/second; separate concurrency and credit limits. Cheapest paid plan $49 a month. Build: full retained archive, 80M credits/month, 50 requests/second, 10 concurrent queries, 500 subscriptions and $50 export credits/month. Annual: $468/year ($39/month equivalent). History from Not stated Links Documentation PricingChecked 6 November 2026
Adanos SoftwarePolymarket	Prices: yes	Order books: not stated	Trades: not stated	History: yes	Wallets: not stated	Trading: not stated	REST	Yes	$29 a month
Data Markets Prices Price history Signals Delivery REST SDKs: Python, TypeScript, PHP, Go Markets covered Polymarket Sign-in API key (X-API-Key) Free use Yes. 250 requests/month; 100 requests/minute; 30 days of lookback; non-commercial use; data refreshed hourly. Rate limits Free 100 requests/minute; Hobby and Professional 1,000 requests/minute, plus monthly quotas. Cheapest paid plan $29 a month. Hobby: 250,000 requests/month, 1,000 requests/minute, 90-day lookback; non-commercial only. $290/year alternative; Professional $299/month adds commercial use and raw market snapshots. History from Not stated Links Documentation PricingChecked 6 November 2026
AdjacentKalshi, Polymarket	Prices: yes	Order books: not stated	Trades: yes	History: yes	Wallets: not stated	Trading: not stated	RESTMCPFiles	Yes	$50 a month
Data Markets Prices Trades Price history Signals Delivery REST MCP bulk files (CSV, TSV) Markets covered Kalshi, Polymarket Sign-in none for public delayed API; API key or session Bearer token for realtime API Free use Yes. 15-minute delay; hourly history for previous 30 days or daily history for previous 90 days; 400 requests/10 seconds burst and 480/60 seconds sustained/IP. Rate limits Public 400 requests/10 seconds burst, 480/60 seconds sustained/IP. Pro 30/minute and 20,000/day; Premium 180/minute and 150,000/day/organization; 4 concurrent paid requests, up to 2 seconds queue wait. Cheapest paid plan $50 a month. Pro: realtime indices, rates, markets, history, research and MCP; 5 seats; 30 requests/minute and 20,000/day/organization. History from Not stated Links Documentation PricingChecked 6 November 2026
BravadoPolymarket, Predict.fun +1	Prices: yes	Order books: yes	Trades: yes	History: yeswith books	Wallets: yes	Trading: yes	RESTWebSocketMCPSQL	Yes	$49 a month
Data Markets Prices Order books Trades Price history Order-book history Wallets Resolutions Trading Delivery REST WebSocket MCP SQL Markets covered Polymarket, Predict.fun, Kalshi Sign-in API credentials with HMAC request signing; OAuth for MCP Free use Yes. 5,000 API credits/month; 5 requests/second; 1 key. Data API and MCP included; Market Data and Trade API require a paid plan or entitlement. Rate limits Free 5; Build 30; Accelerate 150; Scale 400 requests/second. Cheapest paid plan $49 a month. Build: 100,000 credits/month, 30 requests/second, 5 keys, WebSocket support; overage $8/10,000 credits. Annual billing advertises 20% off. History from Not stated Links Documentation PricingChecked 6 November 2026
DepthFeedPolymarket, Kalshi +1	Prices: yes	Order books: yes	Trades: yes	History: yessince 2026	Wallets: not stated	Trading: not stated	RESTWebSocketMCP	Yes	$29 a month
Data Markets Prices Order books Trades Price history Order-book history Resolutions Delivery REST WebSocket MCP Markets covered Polymarket, Kalshi, Limitless Sign-in API key Free use Yes. Explorer: rolling 7-day history; 1 request/second; 1 BTC live-book subscription. Pricing calls the free depth a recorded sample; docs describe full-venue access. Rate limits Explorer 1 request/second (docs: 60/minute); Quant 25/second and 1,000/minute; Research 50/second and 3,000/minute; Desk 100/second and 6,000/minute. Historical concurrency is separate. Cheapest paid plan $29 a month. Quant: 30-day history; 25 requests/second and 1,000/minute; 5 live subscriptions, 1 connection; 200 AI credits/month. History from 14 April 2026 Links Documentation PricingChecked 6 November 2026
EdgeMarketPolymarketwaitlist	Prices: yes	Order books: not stated	Trades: yes	History: not stated	Wallets: yes	Trading: not stated	REST	No	$79 a month
Data Prices Trades Wallets Signals Delivery REST Markets covered Polymarket Sign-in Not stated Free use No. Free Observer and $39/month Operator do not include REST API access. Rate limits Not stated Cheapest paid plan $79 a month. Principal includes REST API, outbound webhooks and L2 book tools; API access opens after 90 days of register. Tax included; annual discount advertised. History from Not stated Links DocumentationChecked 6 November 2026
KalshiSpyKalshi	Prices: yes	Order books: not stated	Trades: yes	History: not stated	Wallets: yes	Trading: not stated	RESTMCP	Yes	$116 a month
Data Markets Prices Trades Wallets Resolutions Signals Delivery REST MCP Markets covered Kalshi Sign-in none for public settled-win archive and market search; API key (Bearer or x-api-key) for live tools Free use Yes. Public settled-win archive: 60 requests/minute/IP. List cache 10 minutes; detail cache 1 hour. Live positions require a paid key. Rate limits Public archive 60 requests/minute/IP; Elite 500 requests/day; Lifetime 50/day; optional extra traffic roughly 60 requests/minute/account. Cheapest paid plan $116 a month. Elite LLM Access promotional price (regular $200): live API/MCP and 500 requests/day. $1,160/year promotional alternative; Lifetime $435 once includes 50/day. Optional overage $10/1,000 requests. History from Not stated Links Documentation PricingChecked 6 November 2026
LazyEdgeKalshi, Polymarket	Prices: yes	Order books: yes	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	RESTWebSocket	No	$49.99 a month
Data Prices Order books Signals Delivery REST WebSocket Markets covered Kalshi, Polymarket Sign-in API key (Authorization: Bearer) Free use No. Free pick-em and lower paid terminal plans do not include API. Five or more Lazy Lions NFTs unlock API without subscription; asset acquisition is not described as free. Rate limits Not stated Cheapest paid plan $49.99 a month. Quant Node: API keys, agent guide, WebSocket and webhook edge alerts. Current subscriber price locks while active; later new subscriptions advertised at $149.99/month. History from Not stated Links Documentation PricingChecked 6 November 2026
LycheeKalshi, Polymarket	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: not stated	Files	Yes	$49 a month
Data Markets Prices Order books Trades Price history Wallets Resolutions Signals Delivery bulk files (CSV, XLSX, JSON) Markets covered Kalshi, Polymarket Sign-in Not stated Free use Yes. Demo: up to 100 rows/data sheet, 1 dashboard, 1 tab, up to 12 data sheets; no account/card for demo. Free export allowance not stated. Rate limits Not stated Cheapest paid plan $49 a month. Researcher: 500,000 rows/sheet, unlimited CSV/Excel/JSON exports within data limits, 10 live feeds and 10GB workspace. Also $19/week or annual first-year promotion $245/year, renewing at $490/year; period toggles checked in browser. History from Not stated Links DocumentationChecked 6 November 2026
MarketlensPolymarket	Prices: yes	Order books: not stated	Trades: yes	History: yessince 2026	Wallets: not stated	Trading: not stated	RESTMCPFiles	Yes	$39 a month
Data Markets Prices Trades Price history Order-book history Signals Delivery REST MCP bulk files (Parquet) SDKs: Python Markets covered Polymarket Sign-in API key (Authorization header) Free use Yes. 2M data rows once; markets open during last 7 days; 180 requests/minute; 1 key; bulk exports and SDK. Rate limits Free 180; Pro 3,600; Scale 10,800 requests/minute, per user across keys. Cheapest paid plan $39 a month. Pro: 5B rows/month, full archive since March 2026, 3,600 requests/minute, 5 keys; unused rows roll over one month. History from 1 March 2026 Links Documentation PricingChecked 6 November 2026
MeshKalshi, Polymarket	Prices: not stated	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	RESTMCP	Yes	$24.99 a month
Data Signals Delivery REST MCP SDKs: Python Markets covered Kalshi, Polymarket Sign-in API key (X-API-Key); hosted MCP browser login Free use Yes. 3 full-event transcript unlocks/day shared by web/API/MCP; 10 API/MCP searches/day; 15-segment preview. Pricing also shows 3/month, inconsistent with docs. Rate limits Free/Trial/Pro/Max API keys 60 requests/minute; Enterprise 300/minute; JWT web/hosted MCP 120/minute/user. Cheapest paid plan $24.99 a month. Pro: 15 transcript pulls/day, 150 searches/day, 450 pulls/month; 14-day free trial. Max $49.99/month. History from Not stated Links Documentation PricingChecked 6 November 2026
NautilusTraderPolymarket	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocket	Yes	–
Data Markets Prices Order books Trades Price history Wallets Trading Delivery REST WebSocket SDKs: Python, Rust Markets covered Polymarket Sign-in none for public venue data; venue API credentials and wallet signature for trading Free use Yes. Open-source trading engine and adapter; underlying venue limits apply, no separate hosted data quota stated. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
OddpoolKalshi, Polymarket	Prices: yes	Order books: yes	Trades: yes	History: yeswith books	Wallets: not stated	Trading: not stated	RESTWebSocketFiles	Yes	–
Oddpool is not taking new subscriptions; existing and free accounts continue.
Data Markets Prices Order books Trades Price history Order-book history Signals Delivery REST WebSocket bulk files (CSV) Markets covered Kalshi, Polymarket Sign-in API key Free use Yes. 1,000 requests/month; 1 request/second; 1 key; 1 WebSocket connection, 2 events, distribution channels only. Rate limits Free 1; Pro 10; Premium 25; Enterprise 500 requests/second; monthly quotas also apply. Cheapest paid plan Not stated History from Not stated Links Documentation PricingChecked 6 November 2026
OddsPipePolymarket, Kalshi	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	REST	Yes	$49 a month
Data Markets Prices Signals Delivery REST SDKs: Python Markets covered Polymarket, Kalshi Sign-in API key Free use Yes. Free API tier; numeric minute/day caps not stated in readable pricing page (plans remain loading). Matched-pair refresh 1–5 minutes. Rate limits Not stated Cheapest paid plan $49 a month. Build for solo production apps. Homepage lists Launch $99 and Scale $299; detailed plan quotas did not render. History from Not stated Links Documentation PricingChecked 6 November 2026
OddsRelayBetfair, Smarkets +1	Prices: yes	Order books: not stated	Trades: not stated	History: yessince 2026	Wallets: not stated	Trading: not stated	RESTMCPFiles	Trial	£19 a month
Data Markets Prices Price history Signals Delivery REST MCP bulk files (format not stated) SDKs: Python, TypeScript, R Markets covered Betfair, Smarkets, Matchbook Sign-in API key (Bearer or x-api-key) Free use Free trial. 14-day trial, 50,000 tokens, no card; free cost-quote calls. This is a trial, not a recurring free tier. Rate limits Not stated Cheapest paid plan £19 a month. Starter: 50,000 tokens/month, personal use; all products/bookmakers in region. Pro £99/month, Enterprise from £750/month. History from 17 October 2026 Links Documentation PricingChecked 6 November 2026
outcometickPolymarket, Predict.fun	Prices: yes	Order books: not stated	Trades: yes	History: yessince 2026	Wallets: not stated	Trading: not stated	RESTFiles	Sample	$10 a month
Data Markets Prices Trades Price history Order-book history Resolutions Delivery REST bulk files (CSV.gz, JSONL.gz, Parquet) Markets covered Polymarket, Predict.fun Sign-in API key (Bearer; query-string alternative for downloads) Free use Free sample. Free sample files for each venue; no recurring free production API tier stated. Rate limits Not stated Cheapest paid plan $10 a month. One venue: trailing 30 archived days, refreshed daily. Both venues $18/month; one-off historical bundles quoted separately. History from 8 June 2026 Links Documentation PricingChecked 6 November 2026
PolyBackTestPolymarket	Prices: yes	Order books: yes	Trades: not stated	History: yeswith books	Wallets: not stated	Trading: not stated	REST	Yes	$19.9 a month
Data Markets Prices Order books Price history Order-book history Resolutions Delivery REST SDKs: Python Markets covered Polymarket Sign-in API key (Bearer) Free use Yes. 1 request/second; 31-day entitlement; BTC only. Latest accessible markets by timeframe: 5m 50, 15m 50, 1h 24, 4h 24, 24h 5; unlimited snapshots within accessible markets. Rate limits Entry shared 10 requests/second and 300/minute; dedicated starts 25/second and 1,000/minute; customizable up to 100 requests/second. Cheapest paid plan $19.9 a month. Shared: 31-day access, BTC/ETH/SOL, 10 requests/second and 300/minute. Annual $119.40/year ($9.95/month equivalent). 180-day 10-RPS option $69.90/month. AI-only $35 plan excludes Data API. History from Not stated Links Documentation PricingChecked 6 November 2026
PolyEdgePolymarket	Prices: not stated	Order books: not stated	Trades: yes	History: not stated	Wallets: yes	Trading: not stated	RESTSSE	Yes	$49 a month
Data Trades Wallets Signals Delivery REST SSE SDKs: TypeScript, Python, Rust, Go Markets covered Polymarket Sign-in API key (X-PolyEdge-Key) Free use Yes. 1 query/second; 30 analytics requests/day; 1 key; 1 trader stream tracking up to 3 addresses. Rate limits Free 1 query/second and 30/day; Starter 10/second and 1,000/day; Pro 20/second and 5,000/day; Builder 20/second and 50,000/day. Cheapest paid plan $49 a month. Starter personal licence: 10 queries/second, 1,000 analytics requests/day, 1 stream, up to 30 addresses or 1 tag and 2 series. Builder commercial licence $399/month. History from Not stated Links Documentation PricingChecked 6 November 2026
PolyOrderbooksPolymarket	Prices: yes	Order books: not stated	Trades: not stated	History: yeswith books	Wallets: not stated	Trading: not stated	RESTMCPFiles	Yes	$19 a month
Data Markets Prices Price history Order-book history Resolutions Delivery REST MCP bulk files (Parquet, CSV) SDKs: Python Markets covered Polymarket Sign-in API key Free use Yes. Starter: 60 requests/minute, 1,000/day, 3 days of history, full L2 depth, 250ms minimum resolution; 1 AI and 3 strategy backtests. Separate free research dataset. Rate limits Free 60 requests/minute and 1,000/day; entry data plan 300/minute and 50,000/day; speed add-ons and custom Enterprise. Cheapest paid plan $19 a month. 30-day data: 300 requests/minute, 50,000/day, 250ms resolution; 60/90/120-day options $29/$39/$49. AI-only plan is separate. History from Not stated Links Documentation PricingChecked 6 November 2026
PolyRouterPolymarket, Kalshi +2	Prices: yes	Order books: not stated	Trades: yes	History: yes	Wallets: not stated	Trading: not stated	RESTMCP	Yes	–
Data Markets Prices Trades Price history Delivery REST MCP Markets covered Polymarket, Kalshi, Limitless, Manifold Sign-in API key (X-API-Key); homepage interactive tester is keyless Free use Yes. Free to get started; 100 requests/minute for all users. Rate limits 100 requests/minute for all users; higher limits by request. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
PredexonPolymarket, Kalshi +3	Prices: yes	Order books: yes	Trades: yes	History: yeswith books	Wallets: yes	Trading: not stated	RESTWebSocketMCPFiles	Yes	$49 a month
Data Markets Prices Order books Trades Price history Order-book history Wallets Resolutions Signals Delivery REST WebSocket MCP bulk files (Parquet) Markets covered Polymarket, Kalshi, Opinion, Limitless, Predict.fun Sign-in API key (x-api-key) Free use Yes. 1 request/second; 1,000 premium requests/month; free/historical endpoints unlimited by monthly quota, still rate-limited. No free WebSocket. Tick downloads billed separately; $50 credits conditional on adding payment method. Rate limits Free 1; Dev 20; Pro 100 requests/second; Enterprise custom. Cheapest paid plan $49 a month. Dev: 20 requests/second, 1M premium requests/month, Smart Money and Binance references, 10 WebSocket subscriptions × 10 items; overage $5/100,000 premium calls. History from Not stated Links Documentation PricingChecked 6 November 2026
PredictefyPolymarket, Polymarket US +14	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: yes	RESTWebSocketMCPSQL	Yes	$48.88 a month
Data Markets Prices Order books Trades Price history Wallets Resolutions Signals Trading Delivery REST WebSocket MCP SQL SDKs: TypeScript, Python Markets covered Polymarket, Polymarket US, Kalshi, Hyperliquid, Limitless, Opinion, Predict.fun, Myriad, Rain, Gemini, SX Bet, PRED, Pascal, XO, PredictStreet, Novig Sign-in API key; trading also uses client-side venue/wallet signing Free use Yes. 25,000 weighted credits/month; 60 requests/minute; 1 key; 2 live streams; 7-day history window; paper trading up to 10 open orders. Rate limits Free 60; Builder 300; Pro 3,000 requests/minute; Enterprise custom. Cheapest paid plan $48.88 a month. Builder: 250,000 credits/month, 300 requests/minute, 3 keys, 20 streams, 12-month history entitlement, bulk endpoints; no replay. $11/100,000 credit top-ups; annual advertises 20% off. History from Not stated Links Documentation PricingChecked 6 November 2026
PredictionMarketsPicksKalshi, Polymarket +3	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	MCPFiles	Yes	$14.99 a month
Data Markets Prices Signals Delivery MCP bulk files (JSON, CSV) Markets covered Kalshi, Polymarket, Polymarket US, Novig, ProphetX Sign-in none for free MCP tools; paid account/token for Pro tools Free use Yes. MCP page advertises 39 free tools; count varies by registry versus listed endpoint. No numeric request limit stated. Rate limits Not stated Cheapest paid plan $14.99 a month. Pro tools and edge feeds. Annual $150/year; code NFL26 first-year $111 promotion through December 31. Enterprise JSON/CSV outlet feeds contact sales. History from Not stated Links Documentation PricingChecked 6 November 2026
ProbalyticsPolymarket, Kalshi	Prices: yes	Order books: not stated	Trades: yes	History: yessince 2020	Wallets: not stated	Trading: not stated	RESTSQLFiles	Trial	$39 a month
Data Markets Prices Trades Order-book history Resolutions Delivery REST SQL bulk files (Parquet) SDKs: Python Markets covered Polymarket, Kalshi Sign-in API key for REST and S3; SQL credentials Free use Free trial. 3-day trial of paid plans, covering last 7 days across venues/access methods. No recurring free tier stated. Rate limits Starter 100 queries/hour; Pro 1,000 queries/hour. Maximum result rows 100K and 1B respectively. Separate REST requests-per-second limit not stated. Cheapest paid plan $39 a month. Starter: rolling 30-day market/trade history, REST and ClickHouse SQL; 100 queries/hour, 100K maximum result rows. Pro $129/month unlocks full market/trade history and bulk Parquet; book data starts $249/month. History from 2 October 2020 Links Documentation PricingChecked 6 November 2026
Resolved MarketsPolymarket	Prices: yes	Order books: yes	Trades: yes	History: yeswith books	Wallets: not stated	Trading: not stated	RESTWebSocketMCP	Yes	$17 a month
Data Markets Prices Order books Trades Order-book history Resolutions Delivery REST WebSocket MCP Markets covered Polymarket Sign-in API key (X-API-Key); optional x402 per-request payment Free use Yes. 5,000 credits/month; 300 requests/minute; 2 keys; full book depth and unlimited retained history; MCP; no WebSocket. Rate limits Free and Pro 300; Scale 1,000; Enterprise 3,000 requests/minute. Cheapest paid plan $17 a month. Pro: 50,000 credits/month; 300 requests/minute; 5 keys; 1 WebSocket connection and backtest tools. x402 separately $0.001/request in USDC. History from Not stated Links Documentation PricingChecked 6 November 2026
sports-skillsKalshi, Polymarket +1	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: not stated	Trading: yes	REST	Yes	–
Data Markets Prices Order books Trades Price history Signals Trading Delivery REST SDKs: Python Markets covered Kalshi, Polymarket, ProphetX Sign-in none for public read clients; wallet and venue credentials for Polymarket trading module Free use Yes. Open-source client/skills; zero API keys for public data; no separate hosted request quota. Upstream limits apply. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
TickFoundryPolymarket, Kalshi	Prices: yes	Order books: yes	Trades: yes	History: yeswith books	Wallets: not stated	Trading: not stated	RESTFiles	Sample	$29 a month
Data Markets Prices Order books Trades Price history Order-book history Resolutions Delivery REST bulk files (Parquet, CSV) Markets covered Polymarket, Kalshi Sign-in API key; account for claimed download allowance Free use Free sample. 5 market-days from July 2026; no card; free sample day for Kalshi 2026-10-07 and Hyperliquid 2026-08-12. Separate public sample download. Rate limits Polymarket Starter and L10 60 requests/minute; L25 600 requests/minute, plus download caps/fair use. Cheapest paid plan $29 a month. Polymarket Starter: one series at full 25-level depth, top-of-book/Lab access, REST 60 requests/minute, up to 50 downloads/day, 7-day pre-join history. Historical backfill extra; yearly includes archive up to 12 months. Other venues have their own pricing tabs. History from Not stated Links Documentation PricingChecked 6 November 2026
Polymarket Paper TraderPolymarket, Kalshi	Prices: yes	Order books: yes	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	MCP	Yes	–
Data Markets Prices Order books Resolutions Delivery MCP Markets covered Polymarket, Kalshi Sign-in none for public upstream reads/local stdio MCP; self-hosted remote auth descriptions conflict (optional OAuth/OIDC versus unauthenticated transport) Free use Yes. Local open-source package and stdio MCP; no hosted quota stated, upstream venue limits apply. USD 10,000 virtual starting balance is simulation money, not a free financial benefit. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
OpticOddsBetDEX, Betfair Exchange +17	Prices: yes	Order books: yes	Trades: not stated	History: yes	Wallets: not stated	Trading: not stated	RESTSSEMCP	?	Contact sales
Data Markets Prices Order books Price history Resolutions Signals Delivery REST SSE MCP Markets covered BetDEX, Betfair Exchange, Betfair Exchange (Australia), DraftKings Predictions, FD Predicts, Gemini Exchange, Kalshi, Limitless Exchange, Matchbook Exchange, Novig, Opinion Labs, Orbit Exchange, Polymarket, Polymarket (USA), Prophet X, Robinhood, SX Bet, Underdog Predictions, Sporttrade Sign-in API license key (X-Api-Key); Bearer key for MCP Free use Not stated Rate limits General v3 guidance: standard 2,500 requests/15 seconds; streaming 250/15 seconds; historical 10/15 seconds. Non-sport prediction-market endpoint entitlement enabled per key. Cheapest paid plan Contact sales History from Not stated Links Documentation PricingChecked 6 November 2026
Artemis	Prices: yes	Order books: not stated	Trades: not stated	History: yes	Wallets: not stated	Trading: not stated	RESTMCPSQL	?	Contact sales
Data Markets Prices Price history Signals Delivery REST MCP SQL or database share (Snowflake) Markets covered Not stated Sign-in Not stated Free use Not stated Rate limits Not stated Cheapest paid plan Contact sales History from Not stated Links DocumentationChecked 6 November 2026
ClickHousePolymarket	Prices: not stated	Order books: not stated	Trades: yes	History: not stated	Wallets: not stated	Trading: not stated	SQL	Yes	–
Data Markets Trades Delivery SQL Markets covered Polymarket Sign-in Not stated Free use Yes. Free CryptoHouse SQL demo; no numeric query quota or history floor stated in article. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Climate SightKalshi, Polymarket	Prices: not stated	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	RESTSSEWebSocket	?	–
Data Signals Delivery REST SSE WebSocket Markets covered Kalshi, Polymarket Sign-in API key (Bearer) Free use Not stated Rate limits 120 requests/minute/API key; unlimited SSE connections; WebSocket connection quota by account via support. SSE reconnect approximately every 400 seconds. Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
pdataPolymarket, Kalshi +6	Prices: yes	Order books: not stated	Trades: not stated	History: yes	Wallets: not stated	Trading: not stated	RESTMCP	Yes	–
Data Markets Prices Price history Signals Delivery REST MCP Markets covered Polymarket, Kalshi, Manifold, Myriad, Limitless, Predict.fun, Opinion, Gemini Sign-in none Free use Yes. OpenAPI states all endpoints public, no auth and no rate cards. Numeric rate limit not stated. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
PolyDeskPolymarket	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: yes	Trading: yes	REST	?	–
Data Markets Prices Wallets Signals Trading Delivery REST Markets covered Polymarket Sign-in platform-origin identity and bounded buyer authorization for funding/trading; public discovery manifest Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
polymarket-mcp (pr1m8)Polymarket	Prices: yes	Order books: yes	Trades: yes	History: yes	Wallets: yes	Trading: not stated	MCP	Yes	–
Data Markets Prices Order books Trades Price history Wallets Delivery MCP SDKs: Python Markets covered Polymarket Sign-in none for public upstream reads Free use Yes. Locally installed open-source MCP package; upstream Polymarket limits apply. No hosted quota stated. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
polymarket-tennisPolymarket	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: not stated	Trading: not stated	REST	Yes	–
Data Markets Prices Signals Delivery REST SDKs: Python Markets covered Polymarket Sign-in none for public Gamma market reads; Live Tennis API key for score feed Free use Yes. Toolkit free, Polymarket discovery keyless. Live Tennis free tier: 30 requests/minute and 100/day; watch uses 1 score-feed request/poll, default 60 seconds. Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links Documentation PricingChecked 6 November 2026
PolynodePolymarket	Prices: yes	Order books: yes	Trades: yes	History: yeswith books	Wallets: yes	Trading: yes	RESTWebSocket	Yes	$50 a month
Data Markets Prices Order books Trades Price history Order-book history Wallets Resolutions Trading Delivery REST WebSocket SDKs: TypeScript, Python, Rust Markets covered Polymarket Sign-in API key (x-api-key or WebSocket key); user-owned wallet authorization for trading Free use Yes. 1 event + 1 orderbook WebSocket connection; session 1 hour/day; 1 key; 10,000 filter items/subscription; snapshot_count 20; no V3 historical REST. Pricing displays 100K API requests and 5GB each of book/Chainlink and on-chain streams monthly; docs say monthly enforcement not active yet. Rate limits Account-shared V3 REST: Starter 1,000/minute standard and heavy; Growth 2,000/minute standard, 1,500 heavy; Enterprise 4,000 standard and 1,500 heavy by default. Free excludes V3 REST; 1-hour/day stream session. Cheapest paid plan $50 a month. Starter: V3 standard/heavy REST 1,000 requests/minute, 10+10 sockets, unlimited sessions; 3-day trial. Pricing includes 10M requests and 250GB each stream category, then $5/1M requests and $0.50/GB. History from Not stated Links Documentation PricingChecked 6 November 2026
Prediction LabsPolymarket	Prices: yes	Order books: yes	Trades: yes	History: yeswith books	Wallets: yes	Trading: not stated	SQLFiles	Trial	$200 a month
Data Markets Prices Order books Trades Order-book history Wallets Resolutions Delivery SQL bulk files (CSV) SDKs: Python Markets covered Polymarket Sign-in provisioned access; credential scheme not stated Free use Free trial. 7-day trial; docs state no limit on number of requests and untruncated retained history. Rate limits Documentation says no limit on number of requests; numeric per-second throughput not stated. Cheapest paid plan $200 a month. Polymarket Indexer: ClickHouse access, CSV order books, on-chain events/CLOB data and individual technical support; access by form. History from Not stated Links DocumentationChecked 6 November 2026
Predxy	Prices: yes	Order books: not stated	Trades: not stated	History: yes	Wallets: not stated	Trading: not stated	REST	?	–
Data Markets Prices Price history Signals Delivery REST Markets covered Not stated Sign-in Not stated Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
racinglinesPolymarket, Kalshi +1	Prices: yes	Order books: yes	Trades: not stated	History: yeswith books	Wallets: not stated	Trading: not stated	MCP	?	–
Data Markets Prices Order books Price history Order-book history Signals Delivery MCP SDKs: Python Markets covered Polymarket, Kalshi, OG.com Sign-in Not stated Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
Seeker Labs	Prices: yes	Order books: not stated	Trades: not stated	History: yes	Wallets: not stated	Trading: not stated	REST	?	–
Data Markets Prices Price history Signals Delivery REST Markets covered Not stated Sign-in API key (x-api-key) described; schema header optional Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026
UnifAIPolymarket, Opinion	Prices: yes	Order books: not stated	Trades: not stated	History: not stated	Wallets: yes	Trading: yes	MCP	?	–
Data Markets Prices Wallets Trading Delivery MCP SDKs: JavaScript, TypeScript, Python, Rust Markets covered Polymarket, Opinion Sign-in Agent API key; separate Toolkit API key for toolkit hosting; connected-wallet authority for execution Free use Not stated Rate limits Not stated Cheapest paid plan Not stated History from Not stated Links DocumentationChecked 6 November 2026

Open-source clients

Code libraries for calling the markets' APIs, with the language, licence and latest release from each repository.

CCXT prediction market exchanges
JavaScript, TypeScript, Python, C#, PHP, Go, Java, Rust for Binance, Hyperliquid, Kalshi, Limitless, Myriad, Opinion, Polymarket, Predict.fun, SX Bet
MIT, released 4 November 2026
dr-manhattan
Python for Polymarket, Kalshi, Opinion, Limitless, Predict.fun
released 7 December 2025
Kalshi MCP Server (cejor6)
Python for Kalshi
MIT, released 13 July 2026
kalshi-cpp
C++ for Kalshi
MIT, released 4 November 2026
kalshi-starter-code-python
Python for Kalshi
Licence not stated
Limitless SDKs
Python for Limitless
MIT
Manifold Markets MCP Server
JavaScript for Manifold
MIT, released 11 January 2025
New York Compute Kalshi Tools
TypeScript for Kalshi
MIT, released 28 December 2025
PMXT
Python, TypeScript for Polymarket, Polymarket US, Kalshi, Limitless, Probable, Baozi, Myriad, Opinion, Metaculus, Smarkets, Hyperliquid, Gemini Titan, SuiBets, Rain, Hunch
MIT, released 18 July 2026
poly_data
Python for Polymarket
GPL-3.0
polyfill-rs
Rust for Polymarket
MIT OR Apache-2.0, released 8 September 2026
Polymarket Agent Skills
Markdown for Polymarket
Licence not stated
PolyMarket MCP (berlinbra)
Python for Polymarket
MIT
Polymarket Python SDK (py-sdk)
Python for Polymarket
MIT, released 5 November 2026
Polymarket Subgraph
TypeScript for Polymarket
LGPL-3.0, released 17 February 2021
Polymarket Toolkit
TypeScript, Python for Polymarket
MIT, released 15 July 2026
Polymarket TypeScript SDK (ts-sdk)
TypeScript for Polymarket
MIT
polymarket-apis
Python for Polymarket
Licence not stated
polymarket-mcp (ozgureyilmaz)
Rust for Polymarket
MIT, released 5 January 2026
Polymarket_data (SII)
Python for Polymarket
MIT
Predict.fun SDK
TypeScript for Predict.fun
MIT, released 28 July 2026
Prediction Markets MCP (JamesANZ)
TypeScript for Polymarket, PredictIt, Kalshi
MIT
prediction-market-analysis
Python for Polymarket, Kalshi
MIT
prediction-market-backtesting
Python, Rust for Polymarket
MIT (original code); LGPL-3.0-or-later (NautilusTrader-derived code)
predmarket
Python for Kalshi, Polymarket
Licence not stated
pykalshi
Python for Kalshi
MIT
rs-clob-client-v2
Rust for Polymarket
MIT

Quick answers

Does Polymarket have a public API, and is it free?: Yes. Polymarket publishes its own API (REST, WebSocket, GraphQL). Reading public market data is free and needs no API key. Its rate limits and sign-in methods are in the table on this page.
Does Kalshi have a public API, and is it free?: Yes. Kalshi publishes its own API (REST, WebSocket, MCP). Reading public market data is free and needs no API key. Its rate limits and sign-in methods are in the table on this page.
Where can I get historical prediction market data?: 42 of the APIs here offer historical data, but only 5 state an exact start date; the earliest is Probalytics, from 2 October 2020. Use the "Historical data" filter to see them all.
Which prediction market data providers have a free tier?: 27 of the independent providers state a free tier or free use: 0xArchive, Adanos Software, Adjacent, Bravado, DepthFeed, KalshiSpy and 21 more. Limits differ; each row gives them.
How much does prediction market data cost?: The cheapest published plans range from $10 a month (outcometick) to $200 a month (Prediction Labs). What each plan includes differs, so compare the data and history columns too.
Which prediction market APIs work with AI agents?: 24 offer an MCP server that AI assistants can call directly: Kalshi, Limitless, Hunch, 0xArchive, Adjacent, Bravado and 18 more.

Nobody pays to be listed or for their position. A tick means the provider's own pages say it offers that data; a dash means they do not say. Using or reselling a market's data is governed by that market's own terms, whoever supplies it. Prices and limits change, so the provider's own page is the one that counts. Missing an API? Add it for free, or browse every data feed and API in the directory.

Every profile is built from the product's own pages, and Vultax keeps a dated copy of each one. How the directory is made. Companies already listed can manage their profile.