Pricing

from $20.00 / 1,000 contract pair priced across venues

Polymarket vs Kalshi Arbitrage — Same Question, Two Prices

Give it a question that trades on both Polymarket and Kalshi and get the price gap between them, after Kalshi's fee. Returns best bid and ask on each site, which site to buy on and sell on, the gap in cents per $1 contract. $0.02 per pair priced, suggestions included; refusals are free. Unofficial.

Pricing

from $20.00 / 1,000 contract pair priced across venues

Rating

0.0

(0)

Developer

h ichi

Actor stats

Bookmarked

Total users

Monthly active users

6 days ago

Last modified

Categories

Automation

Developer tools

News

You can access the Polymarket vs Kalshi Arbitrage — Same Question, Two Prices programmatically from your own applications by using the Apify API. You can also choose the language preference from below. To use the Apify API, you’ll need an Apify account and your API token, found in API & Integrations in Apify Console.

Python

JavaScript

CLI

OpenAPI

HTTP

MCP

1from apify_client import ApifyClient
2
3# Initialize the ApifyClient with your Apify API token
4# Replace '<YOUR_API_TOKEN>' with your token.
5client = ApifyClient("<YOUR_API_TOKEN>")
6
7# Prepare the Actor input
8run_input = { "categories": [
9        "Politics",
10        "Economics",
11    ] }
12
13# Run the Actor and wait for it to finish
14run = client.actor("jpmarketdata/prediction-market-arbitrage").call(run_input=run_input)
15
16# Fetch and print Actor results from the run's dataset (if there are any)
17print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
18for item in client.dataset(run.default_dataset_id).iterate_items():
19    print(item)
20
21# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

Polymarket vs Kalshi Arbitrage — Spread After Fees API in Python

The Apify API client for Python is the official library that allows you to use Polymarket vs Kalshi Arbitrage — Same Question, Two Prices API in Python, providing convenience functions and automatic retries on errors.

Install the apify-client

$pip install apify-client

Other API clients include:

Polymarket vs Kalshi Arbitrage — Same Question, Two Prices API in JavaScript

Polymarket vs Kalshi Arbitrage — Same Question, Two Prices API through CLI

Polymarket vs Kalshi Arbitrage — Same Question, Two Prices OpenAPI definition

Polymarket vs Kalshi Arbitrage — Same Question, Two Prices API

Prediction Market Odds: Kalshi, Polymarket and PredictIt

scrapemint/prediction-market-odds-comparison

Find the same question priced differently on Kalshi, Polymarket and PredictIt. Matches equivalent binary Yes/No markets across venues and reports the YES-price gap, the cheaper side, and whether that gap clears both venues bid/ask. Keyless, no browser. Pay per matched pair.

Ken M

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

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

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 Arbitrage Monitor

automation-lab/polymarket-kalshi-arbitrage-monitor

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

Stas Persiianenko

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

Kalshi Arbitrage Finder — Groups Priced Against $1

jpmarketdata/kalshi-odds-arbitrage

Pick Kalshi categories and get each event where at most one outcome can win, priced as a group: sell one contract of each. Returns money back from selling all, profit % before and after fees, and cash tied up. $0.02 per group priced — 17 in one 200-event run; unpriceable ones are free. Unofficial.

h ichi

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 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

719

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.