polynews.news v1 arbitrage

https://polynews.news/api/v1/arbitrage

answers 402

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.

We sent a real GET request to this endpoint and it answered 402 with payment requirements we could parse.

Price: $0.01
Network: base
Pay to: 0x6ee49a7872844397Fb52870Cc07b308fFADC9427
Spec dialect: v2 (declares x402Version 2)
Transport: PAYMENT-REQUIRED header
HTTP method: GET
Response latency: 99 ms
Payment options: 2 usable of 2
Last checked: 2026-08-15T14:22:30.541Z (15h ago)
Category: finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fpolynews.news%2Fapi%2Fv1%2Farbitrage"