Cross-platform arbitrage detection between Polymarket and Kalshi: matched markets, price spreads, fee-adjusted EV. Coverage: liquid Polymarket markets in politics/geopolitics/elections/tech/economy/finance; low-volume long-tail, sports, culture, and weather are not included.
# 1. Ask the endpoint what it costs (no payment, no wallet needed): curl -i -X GET 'https://polynews.news/api/v1/arbitrage' # -> HTTP/1.1 402 Payment Required # the response carries the price, asset and pay-to address. # 2. Pay and retry with any x402 client: npx x402-fetch 'https://polynews.news/api/v1/arbitrage'
Endpoint: https://polynews.news/api/v1/arbitrage. Operated by polynews.news, not by Animica. Price and availability were correct at the last probe on 2026-09-02 and are set by the operator, who may change them.
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