News for hackers. Stuff that matters.

Show HN: Open-source library to unify Polymarket and Kalshi APIs

https://github.com/qoery-com/pmxt

I noticed prediction markets are becoming fragmented (Polymarket on-chain, Kalshi regulated/off-chain), making it painful to write cross-exchange bots. Crypto has ccxt to standardize exchange APIs, but nothing existed for prediction markets.

I built pmxt to solve this. It normalizes the data across platforms so you can treat them as a single liquidity source.

It’s open source and I'm looking for feedback on the API structure before I start adding execution/trading endpoints.

( 1 comment | on HN )
[dead]
Re:Show HN: Open-source library to unify Polymarket and Kals... by SamTinnerholm on Sunday January 25, 2026 @01:43PM (#46756841)
We just released websockets today.

Test coverage is high. I'd recommend checking it out to form your own opinions.