What is Polymarket?
Polymarket is the largest crypto-native prediction market — users bet on real-world event outcomes (elections, sports, crypto prices, geopolitics) with USDC, and the resulting prices function as collectively-priced probability estimates.
A Polymarket binary market has two outcome shares: Yes and No, each trading between $0 and $1. At resolution time (when the real-world outcome is known), winning shares pay out $1 each and losing shares pay $0. The current trading price of the Yes share approximates the market's probability estimate of that outcome being true.
For example: if "Will SPY close above $700 on Dec 31, 2026?" has a Yes share trading at $0.38, the market is pricing a 38% probability of SPY closing above $700.
Why AI agents use Polymarket data
Prediction-market prices are real-time, aggregated, skin-in-the-game probability estimates. They typically outperform individual experts and most polling on calibration. For AI agents reasoning over scenarios — "what's the probability X happens by Y?" — Polymarket prices are a far better oracle than the model's training data alone.
Hive's MCP exposes Polymarket events, market prices, trader positions, and settlement history through normalized tools. CoinGecko MCP, Moralis Cortex, Alchemy, Birdeye, and per-chain MCPs do not cover prediction-market data — Polymarket is one of Hive's unique federation surfaces.