Market Browser
Search every market on Polymarket, Kalshi, and Manifold.
The tool runs at /markets and needs a $49.99/mo membership. There is no free tier and no trial, so opening it signed out lands here rather than on the board. This page is the open documentation of what it does.
Three venues, one search box. The Market Browser queries Polymarket, Kalshi and Manifold together and shows the results side by side, so a question you can trade in two places is visible as such rather than requiring three tabs.
Manifold is play money and is labelled play money on every row it appears on. It is included because it is a useful crowd forecast with a completely open API, not because its prices carry financial signal.
Browse mode and search mode
With an empty search box the page browses: Polymarket's most active markets by twenty-four-hour volume, and Kalshi's from the cached catalog, both with adjustable row counts. It is the fastest way to see what is actually being traded right now on either venue.
Typing a query switches to search. Polymarket search runs against its public event search, Kalshi search runs against both the cached market snapshot and a series-level title and ticker match that reaches beyond the snapshot, and Manifold search runs against its open binary markets sorted by daily volume.
Why the Kalshi catalog is built the way it is
Kalshi's plain market listing opens with more than sixty thousand auto-generated multi-variant parlay legs, which means the first pages any board slices are entirely synthetic and none of the genuinely traded markets reach the application. The catalog behind this browser is crawled from the open-events feed instead, which carries none of those legs and whose market objects are otherwise identical.
That crawl is heavy, so it runs behind a stale-while-revalidate cache rather than in front of a page render. The practical consequence is on the limits list below: a catalog price can be meaningfully older than a live quote.
What a row gives you
Each row carries the market title, its venue, its current price, its daily volume and a link out to the venue itself. Kalshi rows are re-decorated with artwork from the venue's own browse feed where available, and fall back to a category glyph rather than showing nothing.
The browser is a directory. It ranks by volume and matches by text; it does not score, rate or rank markets by anything else.
Where to go from a row
For a full read on one market — live prices, whether tracked sharps hold it, recent flow, cross-book gap and book thinness — the Market Analyzer takes a single market and reports everything held on it. For practising an entry without money, the paper book searches the same catalog.
For markets that opened in the last few days rather than markets that are busy today, Fresh Markets is the board built for that question.
What it cannot tell you
Every tool has a boundary, and knowing where it sits is the difference between using one well and being misled by it. For Market Browser:
- Manifold is play money. Its prices reflect a crowd forecast with no capital behind it and should never be read as a real-money signal.
- Kalshi catalog prices come from a periodically refreshed crawl and can be materially stale. Check the venue's own book before trading on one.
- Polymarket search returns events rather than individual markets, so a search hit may need expanding before it has a price.
- Auto-generated multi-variant parlay legs are excluded from the Kalshi catalog by design. If you are looking for one specifically, it will not be here.
- The browser lists and links; it does not judge. Nothing on this board says a price is right or wrong.
- Volume ranking favours the same large recurring boards day after day, which is why browse mode is a poor discovery tool for anything niche.
What it is built on
- Polymarket gamma: the volume-ranked open-market catalog and the public event search.
- Kalshi trade-api v2 /events with nested markets, crawled into an open-market catalog, plus series-level search.
- Manifold's public v0 API, open binary markets only, sorted by twenty-four-hour volume.
Related reading
- Markets Browser: Search Polymarket, Kalshi, and Manifold in One Place — Guide
- Prediction Market Arbitrage: Polymarket vs Kalshi — Strategy
Tools that pair with it
Just-listed markets, before the flow finds them.
One market, every signal we hold on it, on one screen.
What resolves when, across the markets people are actually trading.
WhaleTracks is informational analytics, not financial advice. Market data comes from Polymarket, Kalshi and Manifold's public APIs; WhaleTracks is not affiliated with any of them. Past performance does not guarantee future results.