arbnx matches equivalent markets across Kalshi and Polymarket, surfaces the spread in real time, and executes both legs automatically — you only pay when a trade fills.
Semantic matching pairs equivalent Kalshi and Polymarket markets, then an LLM verifies the resolution rules actually line up before any spread is shown.
When a spread clears your threshold, both legs fire together — Kalshi and Polymarket — so you capture the gap instead of chasing it by hand.
One credit per automatic trade, both legs included. Market data and the opportunity feed are free — you're only billed when a trade actually fills.