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Bellwether

markets.bellwether/prediction-markets

Live Kalshi + Polymarket prediction-market data and cross-venue arbitrage spreads, one schema.

Yes, your AI can use this right now.Answered a live MCP handshake in 782 ms with no sign-in needed and exposes 3 tools.

Connect it

Settings → Connectors → Add custom connector
URL: https://api.bellwether.markets/mcp

3 tools, verified live

Pulled straight from the server with tools/list on 2026-10-17.
list_markets

List open prediction markets across Kalshi and Polymarket (normalized).

get_market

Get one normalized market. venue is 'kalshi' or 'polymarket'.

matching_markets

Find the same real-world event on both venues, with the YES price spread.

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