Every tool in the catalogue

Prediction-market indices and reference rates, with Kalshi on the tier you can test.

Trader scoring, filters and paper-trading pods over Polymarket. Invite-only.

Self-hosted scanner for covering portfolios across correlated Polymarket contracts.

A store of third-party actors that normalize Kalshi and Polymarket into one row shape.

Daily volume, open interest and fees across thirteen event venues, with methodology.

Brier scores and letter grades for matched questions across four platforms.

One client for seven prediction venues, inside a 104-exchange crypto library.

Open-source forecasting workspace you host yourself, with a Brier score pointing upwards.

Polymarket wallet diagnostics with published methods, intervals and failed tests.

Event contracts on a CFTC-designated exchange, traded from inside the Crypto.com app.

The recorded bid-ask ladder for crypto up-or-down markets, which no venue keeps itself.

Write down what you think will happen, in Slack or a browser, and get scored on it.

Nine event venues normalized into one REST schema, billed by usage credit.

Economic and climate contracts on a CFTC exchange that pays interest on your collateral.

Play-money and real-money markets side by side, priced by an LS-LMSR market maker.

One question, two order books — play money and real money, selected per request.

Brier scores against the crowd, and the recruiting ground for Superforecasters.

Play money, a real order book, and a few thousand euro of prizes split by performance.

A CFTC-designated exchange for event contracts, settled in dollars against named sources.

REST, WebSocket and FIX access to a CFTC-regulated event exchange.

Kalshi's current official Python client - weekly releases, Python 3.13 only, no source.

Kalshi's own generated Python client - closed-source, and unreleased since September 2025.

Event contracts on Base, collateralised in USDC, traded on a central limit order book.

REST and WebSocket for markets, books, candles and trading on Base.

Limitless Exchange's own async Python SDK - CLOB and NegRisk orders, WebSocket, MIT.

No-code queries, charts and backtests over Kalshi and Polymarket history.

Anyone can open a question, anyone can take a side, and the currency buys nothing.

Every read is keyless, the server is MIT-licensed, and the currency is play money.

Proper scoring and public track records on questions nobody can take a position in.

Multi-chain event markets priced by an AMM and settled in stablecoins or in points.

Polymarket whale analytics indexed from Polygon, with a published farmer filter.

CCXT-shaped client for prediction markets, with a hosted API and a self-hosted mode.

Phone-sized Polymarket client with copy trading, parlays and a fee of its own.

Self-custody event contracts on an on-chain order book, resolved by the UMA oracle.

Third-party Polymarket wallet, trader and market analytics, free to browse.

Polymarket's Rust command line - MIT in the manifest, with no LICENSE file in the repo.

Order books, prices and order placement on Polymarket's matching engine.

Community SQL dashboards over Polymarket's on-chain record, free to read and fork.

Polymarket's read-only catalogue of events, markets, series and tags.

Polymarket's CFTC-designated US exchange — dollars, KYC, and no on-chain oracle.

A keyless public gateway for reading, and a signed key behind KYC for trading.

Official SDK for Polymarket US - installs as polymarket-us, unreleased since January.

Official TypeScript client for Polymarket US - npm has shipped nothing since January.

Polymarket's own unified Python SDK - sync and async, data through order signing.

Recorded L2 books for Polymarket crypto markets, priced by how far back you may look.

Polymarket and Kalshi in one terminal, with wallet analytics and a REST API.

Polymarket wallet tracking and an insider finder, with the trading terminal behind a code.

Read-only Polymarket wallet tracker with mark-to-market P&L and a CSV export.

Tick-level book history as Parquet, billed by the gigabyte, plus a mempool-aware feed.

Sixteen venues behind one verb family, priced in credits, with nothing readable for free.

Open-source Kalshi and Polymarket dataset, indexers and analysis scripts.

Political event contracts under CFTC no-action relief, capped at $3,500 a contract.

Free Polymarket wallet checker, leaderboards and event analytics, no signup.

A wiki with a market attached — anyone writes the question, edits it, votes the result.

Polymarket's own Python CLOB client - archived, and declared non-functional by its README.

Unofficial Kalshi client with what the generated SDK leaves out - streams and retries.

Forecast questions that already resolved, and learn in ninety seconds how wrong you were.

Event contracts in the Robinhood app, routed to three exchanges — one of them its own JV.

Forecast what a study will find, before it finds it, and be scored against the estimate.

Polymarket and Kalshi in one browser desk, with copytrading and a shared portfolio.