Prediction market tools and data
115 tools in 7 categories: the venues, clients and bots a trader routes orders through, the data feeds, dashboards and wallet trackers an analyst pays for, the SDKs a developer builds on, and the platforms where forecasters keep score. Each page puts the same five things down as a figure with the day we read it: the fee on a trade, the venues covered, how fresh the prices are, what the API permits, and who resolves the market.
Anyone selling a view on the outcome — tipsters, signal feeds, paid picks — is left out.
Where you live decides what you can trade
88 of 115 serve US persons, and four different mechanisms hide behind that one sentence: a venue can refuse your location, take your word for where you live, decline to move your money, or drop a single state outright.
The same contract costs two prices
Two venues quoting one outcome are quoting different contracts — fees charged on different bases, dollars on one side and a stablecoin on the other, different close times and different resolution sources. 26 tools here line venues up in one view; normalise the four first, then decide whether the gap is an arbitrage.
49 settle in crypto, 28 in cash, 10 in play money, 28 across more than one
What a winning position pays out in, and by which route: most venues send money back only along the rail that funded them, after a hold measured in days. Play money settles in a currency that never comes out — a different product, not a cheaper one.
Leaving Polymarket, Kalshi or Augur?
15 pages on a venue, feed or forecasting site a reader is walking away from — 11 of them already closed, the rest still open to somebody else — each naming the cards here that take over its job, ranked by a printed rule no sponsor can buy.
Added, re-checked or rewritten in the last 14 days.
- ChironusPolymarket and Kalshi scanner with follows, email alerts and a paper-trading journal.
- PredxyOne volume-weighted probability per question across 15 venues, free, no account needed.
- LycheeNo-code queries, charts and backtests over Kalshi and Polymarket history.
- PolycoolPhone-sized Polymarket client with copy trading, parlays and a fee of its own.
- Crypto.com PredictionEvent contracts on a CFTC-designated exchange, traded from inside the Crypto.com app.
- KalshiA CFTC-designated exchange for event contracts, settled in dollars against named sources.
Categories
Filed by the job a tool is hired for, not by its feature list — a backtest inside an analytics dashboard is still an analytics dashboard.
Prediction Market Venues
Where the contracts actually trade — what you can take a position on, and whether you are allowed to.
30 tools
Forecasting Platforms
Scored questions and tracked records, for people who want to be right rather than paid.
9 tools
Prediction Market Data APIs
Prices, order books, resolutions and history for people who write their own code.
29 tools
Prediction Market Analytics & Dashboards
Volume, open interest, cross-venue prices and calibration, read off someone else’s markets.
19 tools
Wallet & Whale Trackers
Who is trading what, read off the public chain — wallet P&L, large trades, trader scores and alerts.
15 tools
Trading Clients & Bots
The product between you and the exchange — terminals, front ends and automated strategies you run.
18 tools
SDKs & Client Libraries
Packages you import to read markets and sign orders from your own code — official, third-party and multi-venue.
10 tools
Collections
The same cards sliced by one thing they have in common rather than by the job they are hired for — what a model can call over MCP, what ships its own source, what settles in play money.
- Prediction Market Tools with an MCP Server22 tools
- Open-Source Prediction Market Tools20 tools
- Play-Money Prediction Platforms10 tools
- Tools That Cover More Than One Venue26 tools
- Tools With a Streaming Feed32 tools
- Prediction Market Tools You Run Yourself20 tools
- Prediction Market Tools That Score a Forecast11 tools
- Cash-Settled Prediction Markets28 tools
- Copy-Trading Tools for Prediction Markets10 tools
Already holding something?
Most people do not arrive at a catalogue to browse. They arrive because a provider shut down, changed its terms, or costs more than the job is worth — one page each, with what here does that job now.
Frequently asked questions
What does "hands-on" mean on a card?
That we obtained a key or an account and used the tool ourselves — priced the same question on more than one venue, hit the free tier until it stopped, followed the documentation to the place where it was wrong. No card carries the badge today: it marks the tools we did run, never the ones we intend to. The other 115 are compiled from the vendor's own documentation, pricing page and terms, and claim to be nothing more.
How often is a card updated?
Per block, not per page. Pricing goes stale in weeks and availability can change overnight, so each block on a card carries its own verification date and the ones that have gone old are flagged on the card itself. There is no site-wide "last reviewed" date, because it would be true of one block and a lie about the rest.
How is a tool filed into a category?
By the job it is bought for, not by its feature list. One product gets one primary category; a backtest inside an analytics dashboard is a capability flag, not a second category. The unit is a product, not a company, so one vendor can hold several cards.
What is not in the catalogue?
Tipsters, signal sellers and anything that tells you which side to take. What is in is venues, forecasting platforms, data and clients — including the ones that hold your money, because here that is the product: every card says who holds it, what you have to prove to get it back and how long the exit takes.
Does paid placement change what a card says?
No. A sponsorship buys a label and presentation — never sort position, never a rating, never a different set of fields, and free cards are never trimmed. Vendor-supplied copy renders in its own labelled block and is never merged into ours.
Can an AI agent read these pages?
Yes. Every card and listing has a plain-Markdown twin at the same URL with .md on the end — /tools/kalshi.md, /tools.md — carrying the fields without the page chrome.