Show HN: Open-source library to unify Polymarket and Kalshi APIs (github.com)

2 points by SamTinnerholm 6mo ago ↗ HN

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.

2 comments

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driver4567 6mo ago ↗

Hi, nice project, just wondering is it battle tested, also in the repo, you say it can fetch data in seconds, I figure this is just a phrase, but seconds would be pretty slow, have you put in effort to make this fast?

SamTinnerholm 5mo ago ↗

We just released websockets today.

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