Embed live Kalshi vs Polymarket odds

Paste two lines into any page and it shows both venues' price on a market, updated whenever the page loads. No account, no key, no tracking — the script sets no cookie and reads nothing but the element you give it.

The snippet

<div data-mm-badge="lsu-vs-ole-miss-lsu">
  <a href="https://marketmaster.live/m/lsu-vs-ole-miss-lsu">LSU vs Ole Miss — LSU — Kalshi vs Polymarket odds</a>
  · live odds via <a href="https://marketmaster.live">MarketMaster</a>
</div>
<script async src="https://marketmaster.live/embed/badge.js"></script>

Change data-mm-badge to any market's slug — the part of the URL after /m/ on any market page. The anchors inside the div are the fallback: if the script is blocked or fails, the reader still sees your link.

Live preview

Just the numbers

If you would rather render it yourself, the same data is one request: https://marketmaster.live/embed/data.json?slug=lsu-vs-ole-miss-lsu. CORS is open, the response is cached two minutes, and prices are dollars per contract. Board-wide data lives at top-spreads.json and movers.json.

Terms

Free, including commercially, on one condition: keep a visible link to marketmaster.live. Prices are observed venue prices, not advice, and a gap between venues is not arbitrage until fees and settlement risk are accounted for — the arbitrage guide shows the working.