Polymarket Documentation
Data and APIs
Polymarket's central limit order book REST and WebSocket API at clob.polymarket.com for order books, prices, order placement and cancellation with signed authentication.
- Free option
- Polymarket
Prediction market data, APIs and SDKs
Market data feeds, historical order books, SDKs, MCP servers and developer tools for building on prediction markets. 134 listed.
134 listings, fullest profiles first
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Website checked 31 Oct 2026
Polymarket Gamma API
Data and APIs
Public read API at gamma-api.polymarket.com for discovering Polymarket events, markets, series, tags, sports and search results without authentication.
- Free option
- Polymarket
Kalshi Trading API
Data and APIs
Kalshi's REST, WebSocket and FIX API for event contracts and perpetual futures, using RSA-PSS signed requests, tiered token rate limits and a demo environment.
- Free option
- Kalshi
Polymarket Embeds
Data and APIs
Polymarket Embeds provides widgets for displaying Polymarket material on other websites.
- Polymarket
polyfill-rs
Data and APIs
Rust crate for Polymarket CLOB and WebSocket access built for low latency, with allocation-tested order book paths and a V2-native 0.4.x line for authenticated trading.
- Free option
- Polymarket
Manifold API
Data and APIs
Manifold's play-money market API at api.manifold.markets with key auth, bet and limit order endpoints, WebSocket updates and a 500 requests per minute limit.
- Free option
- Manifold
Hyperliquid Docs
Data and APIs
Hyperliquid docs for HIP-4 fully collateralized binary outcome contracts traded on HyperCore, sharing the spot trading API, WebSocket streams and builder codes.
- Free option
- Hyperliquid
polymarket-tennis
Data and APIs
Python package from the Live Tennis API team that discovers Polymarket tennis markets via Gamma API, matches them to live matches, and watches prices against score and break points. Observe-only.
- Free option
- Polymarket
ClickHouse
Data and APIs
CryptoHouse is a free SQL query interface over blockchain datasets run by ClickHouse with Goldsky. Prediction market coverage is not stated on the landing page.
- Free option
Griffain
Data and APIs
Griffain describes an engine for software agents. Detailed services and pricing remain limited in the collected overview.
Predict.fun API
Data and APIs
Beta REST API for Predict.fun's BNB Chain order book with public testnet, API-keyed mainnet access requested via Discord, and a 240 requests per minute limit.
- Free and paid
- Predict.fun
Adanos Market Sentiment API
Data and APIs
REST API returning sentiment and attention signals for stock and crypto tickers, with a Polymarket endpoint alongside Reddit, X and news sources. Includes a CLI for traders and agents.
Website now points to a different product
- Free and paid
- Polymarket
polyrec
Data and APIs
Terminal dashboard for Polymarket BTC 15-minute up/down markets combining Chainlink oracle, Binance klines and Polymarket order book depth. Logs each market to CSV and includes backtest scripts.
Website did not answer at the last check
- Free option
- Polymarket
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