A problem people bring · solved

See who's likely to win, free

Prediction markets such as Polymarket and Kalshi show live crowd odds you can read for free, no bet needed. Compare them with Metaculus, a no-money forecasting site, and watch how fast prices move on news. Treat odds as one strong input, not a certainty.

  • 3 stops
  • 15 minutes, all in
  • 4 surprises
  • 1 live demo
Walk the routefirst, who knew?

Chapter 1

Who knew?

the bits nobody tells you
Oh! #1
You can use a betting market as a free forecasting tool without ever placing a bet.
Market prices express the crowd's implied probability of each outcome.
Oh! #2
Odds often react to news within minutes, well before the next poll is published.
Traders update prices as soon as information appears.
Oh! #3
Polymarket's prices can be pulled through a free public API, so you can chart a race yourself.
Its market data is open to read without an account.
Oh! #4
Free forecasting sites such as Metaculus give a second, no-money opinion to compare against.
Metaculus aggregates forecasts from many users without real-money stakes.
People assume

You need to bet to see the odds.

Actually

Reading odds is free on Polymarket and its API. If you trade, Polymarket US charges taker fees that vary by category, so check the fee page.

Chapter 2

The free route, step by step

tap a stop to do it now

3 stops, cheapest first

  1. Stop 1 · ReadRead the crowd's real-money odds on the newsFree to read5 minPolymarket
  2. Stop 2 · PredictPut a small stake behind an opinion$1+ capital5 minWorld (prediction market)
  3. Stop 3 · PredictForecast an event on a BNB Chain market$1+ capital + gas5 minPredict Fun

Three ways through

Pick your route

free, bold, or build the missing piece
  1. Start free tonight

    Read the crowd tonight

    Odds are free to read and update in minutes. Compare money markets with Metaculus and Manifold, which use no cash.

    1. Read the crowd's real-money odds on the news
    2. Compare with Metaculus or Manifold for a no-money view.

    Cost Free.

  2. The bold play

    Make your own call and keep score

    Forecast free on Manifold or Metaculus and build a public track record, no bet required.

    1. Put a small stake behind an opinion
    2. Forecast an event on a BNB Chain market

    Cost Free to forecast; real-money trading costs fees and may be illegal where you live.

  3. Build it

    Build the odds-move alert

    Built by the House

    Newsrooms want to know when odds jump across Polymarket, Kalshi and Limitless at once. No simple cross-venue alert exists.

    1. Own a working onchain app with your name on it
    2. Read the crowd's real-money odds on the news

    Cost Build time; market data is public.

    Build it yourselfwith Deployr Build it with the Housein the Workshop

Your version

Make this mine

Tell the Engine where you stand and it re-routes this answer for you. Three free a day, shared with Ask the Engine. Engine Pro members get unlimited.

What I already have

Past the basics

What’s possible

live today, or yours to build

Project + project

Combos nobody marketed

A + B = something new
  • PolymarketMetaculus

    Money odds against expert forecasts on one screen.

    Why it works When they disagree, that is the story.

  • Manifoldyour feed

    A free public score that proves your calls.

    Why it works Manifold uses play money and keeps a public record.

  • PolymarketLimitless

    Spot price gaps between venues.

    Why it works Both run order books; Limitless is on Base.

Chapter 3

Try it live

Do not take our word for it. Polymarket runs right here, so you can poke at the real thing before you commit to anything.

Screening Room

Watch it first

More films →

Chapter 4

Where it matters most

  • voters in the US and UK

    Their elections are among the most heavily traded.

  • business and supply planners

    A probability is easier to plan around than a headline.

  • journalists

    Odds moves flag news before it trends.

Chapter 5 · Not built yet?

Build it

An alert that pings you when election odds move sharply, with the news story most likely behind the move.

Who could build it Analysts, newsrooms and campaign staff.

Build it yourselfwith Deployr Build it with the Housein the Workshop

For founders

Uses you never marketed

All projects →
PolymarketUnmarketed use

A free public forecasting dashboard for people who never trade.

Connections

People to meet

Propose a bridge →
  • Polymarket

    Follow market updates.

    Say hello
  • Metaculus

    Join a forecasting tournament.

    Say hello
  • Manifold

    Ask the community about election markets.

    Say hello

Propose a bridgetwo projects, one outcome neither could reach alone

Questions

Is reading Polymarket odds free?

Yes. Anyone can read Polymarket odds on the site or its public API without an account or a bet.

Are Polymarket election odds accurate?

Polymarket odds are often a useful signal, but thin or manipulated markets can be wrong, so treat them as one input.

Can I trade on Polymarket from my country?

Polymarket access depends on your country, and US users trade through the CFTC-regulated Polymarket US after identity checks.

Is trading on Polymarket gambling?

Some countries treat prediction markets like Polymarket as gambling, so check local law before you trade.

The spark

What would you predict differently if you checked the crowd's odds before every headline?

Talk to the House about itBuild it with us

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