Pricing

Pay per event

Polymarket & Kalshi Arbitrage Monitor

Match public Polymarket and Kalshi binary contracts, compare outcome prices, and export confidence evidence with candidate cross-market spread calculations.

Pricing

Pay per event

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Developer

Stas Persiianenko

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Monthly active users

5 days ago

Last modified

Polymarket Kalshi Arbitrage Monitor & Price Matcher API through CLI

The Apify CLI is the official tool that allows you to use Polymarket & Kalshi Arbitrage Monitor locally, providing convenience functions and automatic retries on errors.

Install Apify CLI

Using installation script (macOS/Linux):

$curl -fsSL https://apify.com/install-cli.sh | bash

Using installation script (Windows):

$irm https://apify.com/install-cli.ps1 | iex

Using Homebrew:

$brew install apify-cli

Using npm:

$npm install -g apify-cli

Other API clients include:

Polymarket & Kalshi Arbitrage Monitor API in Python

Polymarket & Kalshi Arbitrage Monitor API in JavaScript

Polymarket & Kalshi Arbitrage Monitor OpenAPI definition

Polymarket & Kalshi Arbitrage Monitor API

Polymarket + Kalshi Arbitrage Finder

maximedupre/prediction-market-arbitrage-finder

Compare public Polymarket and Kalshi binary markets. Get ranked theoretical arbitrage opportunities with prices, opposing legs, liquidity, match confidence, and direct market links.

Maxime Dupré

Polymarket × Kalshi Arbitrage Scanner

fkdg_digital/polymarket-kalshi-arbitrage-scanner

Scans Polymarket and Kalshi, matches equivalent binary markets and surfaces risk-free arbitrage opportunities and price divergences.

Franclim Diogo

Cross-Venue Prediction Market Spread Monitor

obsequious_doughnut/cross-venue-market-spread-monitor

Read-only, explainable Polymarket and Kalshi candidate spread analysis with fee, depth, and matching evidence.

BRADLEY B

Polymarket + Kalshi - Prediction Market Intelligence

straightforward_hydra/prediction-market-intelligence

Unified live odds & implied probabilities from Polymarket and Kalshi in one feed. No key.

Dev D

Prediction Market Data Suite (Polymarket + Kalshi)

ichigowa/prediction-market-data-suite

Unified, normalized prediction-market data from Polymarket and Kalshi: market listings, live prices, orderbooks, recent trades and official resolutions in one cross-platform schema. No auth required.

kyle herman

Polymarket Kalshi Arbitrage Finder & Monitor

antndev/polymarket-kalshi-arbitrage-finder

Finds matched markets across Polymarket and Kalshi and computes fee-adjusted, order-book-depth-aware arbitrage edges. Monitor mode emits only new or changed opportunities and can push webhook alerts.

Anton König

Prediction Markets Scraper - Polymarket & Kalshi Combined

feedforge/prediction-markets-scraper

Scrape Polymarket and Kalshi prediction markets in one run. Odds, prices, volume and close dates on one schema, as JSON or CSV.

Dominik

Polymarket + Kalshi Arbitrage Finder

congism/polymarket-kalshi-arb-finder

Scans both Polymarket and Kalshi for matching binary prediction markets and identifies price discrepancies where buying YES on one platform and NO on the other guarantees a risk-free profit. Returns ranked opportunities with trade details and return %. Now covers PredictIt too - see our Arb Scanner.

Cong

705

Prediction Market Scanner — Polymarket vs Kalshi

0xgollum/prediction-market-scanner

Search any topic and get live binary markets from Polymarket and Kalshi side by side — YES/NO prices, volume and links. Pairs the same yes/no question across both platforms and shows how their odds diverge.

0xGollum

Polymarket & Kalshi Scraper - Odds, Markets & Arbitrage

scrapesage/prediction-markets-scraper

Scrape Polymarket & Kalshi prediction markets: live odds & implied probability, 24h/weekly volume, liquidity, order flow (trades), top holders, wallet P&L, price history, and cross-platform arbitrage. Keyless, no browser. Monitor mode tracks odds moves and new markets. Export to JSON, CSV or Excel.