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Polymarket arbitrage tools and bots

Use these tools to investigate cross-market price differences and possible arbitrage. A displayed spread is a starting point for checking the contracts and the trade, not proof that both legs can be executed.

How to choose arbitrage

Verify the event before the price

Similar questions can settle differently or face different trading constraints. Compare the exact outcomes and rules before assuming that positions offset one another.

Evaluate the complete trade

  • Account for fees on the intended legs.
  • Check fill risk and the capital required to complete the trade.
  • Identify incompatible outcomes and settlement differences.
  • Distinguish price comparison from documented execution support.
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21 tools · 1–12 shown

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MKTGAP’s public manual-input prediction-market fee calculator.
MKTGAP
Analytics4.0Editorial

A public manual calculator separating a gross price gap from fee-adjusted pair costs.

  • Access Web
ArbBets entry page showing cross-venue YES/NO price comparison
ArbBets
Data API3.5Editorial

Scan matched outcomes across venues and inspect sizing, prices and costs through the web app or paid API.

  • Access Web · API
Claw Arbs provider walkthrough of orders and strategy analysis
Claw Arbs
Trading bot3.5Editorial

Local desktop agents for paired arbitrage or directional value bets, with paper mode and explicit execution controls.

  • Trading mode Paper · Live automation
  • Access Windows · macOS · Linux
Crosswire prediction-market API page with a request example.
Crosswire
Data API3.5Editorial

Structured settlement comparisons for covered Polymarket and Kalshi contract pairs.

  • Access API · MCP
OddsPipe cross-venue market and spread API overview
OddsPipe
Data API3.5Editorial

Find paired contracts, filter match confidence and investigate cross-venue price differences through REST or Python.

  • Access API
PMIP product overview
PMIP
Analytics3.5Editorial

Investigate why a cross-venue price gap exists before treating it as a trading opportunity.

  • Trading mode Read-only
  • Access Web · Discord · Email
Prediction.com market comparison and smart-money dashboard
Prediction Hunt
Trading terminal3.5Editorial

Compare venue quotes, calculate costs and explore strategies with paper tools before choosing a trading route.

  • Trading mode Paper
  • Access Web · API
Prediction Pilot product overview
Prediction Pilot
Research tool3.5Editorial

A Kalshi-first research assistant with backtests, scheduled alerts and Polymarket comparisons; users execute orders themselves.

  • Trading mode Read-only
  • Access Web
predkit API documentation overview
predkit
Data API3.5Editorial

Normalized multi-venue data, matched markets and resumable alerts, with explicit feature-status limits.

  • Access API · MCP
Resolve Markets introduction to cross-venue contract discovery
Resolve Markets
Analytics3.5Editorial

Public research tools, free account archives and alerts, plus a separate application-only portfolio and trading beta.

  • Access Web
SpreadCore page explaining short-lived sports price gaps
SpreadCore
Trading terminal3.5Editorial

Compare sports odds, size a hedge and manage the Polymarket leg while checking both fills separately.

  • Trading mode Manual
  • Access Web · Telegram
Alphapoly pipeline stages and local setup
Alphapoly (Chainstack)
Analytics3.0Editorial

Run a local app to discover logical contract relationships, construct covering pairs and monitor paired positions.

  • Access Web