MarketMaster

One normalized prediction market API for Kalshi and Polymarket

MarketMaster is a data API and analytics product that ingests Kalshi and Polymarket, matches the same real-world event across both venues, and exposes edges (model fair value vs live price), cross-venue arbitrage spreads, whale trade feeds, and normalized market snapshots. Access is via REST endpoints, a WebSocket stream, Python and JavaScript SDKs, and an MCP server (local via npx or hosted at https://api.marketmaster.live/mcp). The API is read-only and does not place trades.

Category: APIs & backend
Pricing: freemium · from $0
Free tier: yes
API: yes
MCP server: yes
SDK: yes
Open source: no

#prediction-markets #rest-api #websocket #mcp #arbitrage #kalshi #polymarket #sdk

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Listed 2026-10-27 · last verified 2026-10-27 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.95

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API

curl https://toolgrep.com/api/products/marketmaster