The Intelligence Layer for Prediction Market Trading
Automated Value Betting & Arbitrage
Prediction Market Arbitrage Bot
The automated arbitrage bot for Kalshi, Polymarket, Polymarket US, Predict.fun, SX Bet, Sportmarket, Stake.com, BC.Game, Bet105, Pinnacle, and any sportsbook. Find and execute sure bets, pre-match value bets, and live in-play value bets in ~20ms, before the books catch up.
7-day free trial for new members. Windows, macOS & Linux.
12 venues pre-installed
Kalshi, Polymarket, Polymarket US, Predict.fun, SX Bet, Sportmarket, Stake.com, BC.Game, Cloudbet, Bet105, Pinnacle (PS3838), and BetInAsia, arbitrage-ready out of the box
Add any sportsbook
Community-shared configs catch odds changes in ~20ms on any bookmaker via DOM observation
Automated execution
Detects arbitrage opportunities and value bets, then places orders automatically
A sandbox for sports traders
Connect any sportsbook. Define any strategy. Automate any bet type: arbitrage, value, hedging, whatever you can think of. Create independent Strategy Agents, each with its own sport, edge thresholds, execution logic, and risk limits. Connect bookmakers through API or point-and-click calibration. Share and trade calibrations with other members on the Community Hub and go live on new sportsbooks in minutes.
Built for serious arb and value bettors
12 venues pre-installed
Kalshi, Polymarket, Polymarket US, Predict.fun, SX Bet, Sportmarket, Stake.com, BC.Game, Cloudbet, Bet105, Pinnacle (PS3838), and BetInAsia all ready out of the box. WebSocket feeds on Kalshi and Polymarket (~25ms), Predict.fun and SX Bet via API (P2P prediction markets with no account limits), Stake.com via API integration (crypto sportsbook with USDT, BTC, ETH funding), Cloudbet and PS3838 via REST, BC.Game, Bet105, BetInAsia, and Sportmarket via tuned headless browser with ~20ms DOM observation.
Calibrate any sportsbook
For any book without an API, the bot sits directly on the page with a headless browser. A MutationObserver catches odds changes in ~20ms. That's faster than any third-party API that has to scrape the same page, process it, and relay it to you (500-2000ms).
Community-shared calibrations
Members share and grab proven scraper configs for different books and bet types: moneyline, over/under, BTTS, handicap. Each calibrated independently. Skip the setup, go live on a new venue in minutes.
14-step safety pipeline
Kill switch, naked leg tracking, cooldowns, exposure limits, dedup, per-match rate limiting. Every trade passes through before execution.
Live in-play value betting & arbitrage
Edges are biggest during live events when odds shift fast. Across all connected venues, the bot fires one-sided value bets the moment a live price drifts above its true probability, and locks arbs the moment a spread opens between venues. Sub-second reaction time on price movements that last seconds.
Strategy Agents
Independent agents per sport, market type, or venue. Each agent owns its own edge thresholds, execution logic, risk limits, reference venues, and paper or live mode. Run dozens in parallel and tune them independently. Your NBA value-bet agent at Stake.com has nothing to do with your Kalshi-vs-Polymarket cross-venue arb agent on US politics.
Encrypted local credentials
All API keys and bookmaker credentials are stored locally on your machine, encrypted at rest. Nothing is transmitted to any external server. You keep full control of your accounts.
Account Switching
NewManage credentials across all your sportsbook accounts in one place, with Fernet-encrypted storage and per-session browser isolation. Switch profiles cleanly with a hot-restart that opens a fresh browser context, normalizes the navigator object, and matches locale and timezone to the venue. Your accounts stay separate.
Value Betting with Auto-Sniper Re-fire
NewOne-sided edge bets that re-fire when the edge improves. Pre-match and in-play.
Value betting finds odds at soft bookmakers that are higher than the true probability implied by sharp reference lines. Unlike arbitrage, you only bet one side: the side where the edge is positive. Higher expected return over time, no hedge leg needed. Enable No-Vig Odds to strip the bookmaker margin from sharp lines for a cleaner true-probability reference.
Live and in-play value betting: in-play markets are where soft books lag hardest. The moment a live price drifts above its true probability after a goal, red card, or momentum swing, the agent fires before the book catches up, in about 20 to 25 milliseconds. This is value betting on live games done at machine speed, not by hand.
Auto-Sniper re-fire: after a value bet fires, the agent keeps tracking that match. If the edge improves beyond your re-fire threshold, it automatically places another bet on the same outcome. Set your minimum edge improvement, max re-fires per match, and bet size. The bot compounds into positions that keep getting better.
Sniper Mode: limit orders on any bookmaker
NewFor value bettors: set your price, the bot waits and fires.
Bookmakers don't offer limit orders. Now you have them. Pick a match, select an outcome, set the minimum odd you want and your stake. The agent monitors every connected venue and fires the moment your price is available. One shot, done, moves on. Stack multiple targets across matches. Stays tucked away until you need it and never clutters your normal workflow.
Edge Lab: backtest your football betting angles
ExperimentalYour theory. Ten seasons of proof. One click.
Describe a betting angle in plain English (tired teams, wind kills goals, new-manager bounce) and backtest it in about a second against 66,000+ real matches across 18 European leagues and 10 seasons. Every match settles at Pinnacle closing odds, the sharpest price in the market, so a rule that passes here beat the hardest benchmark there is. Up to 66 pre-match data points per match: form, rest, xG, Elo, weather, referee, manager changes, and more. Edge Lab does not predict winners or hand you picks. It tests the rule you define.
Winning angles save to My Angles and arm as filters on your value-bet agents, so the bot fires only on matches your rule approves, and every fire shows the rule behind it. Football only while experimental.
See how Edge Lab worksBacktests are historical evidence, not guarantees.
AI predictions, weather, news, and sharp odds
Beyond detection. The intelligence layer ingests sharp aggregator data, weather model runs, beat reporter feeds, and predictive AI to produce a fair line that updates before book lines react. Every value-bet and arb strategy can opt in to any combination of these signals.
Sharp odds aggregator
NewA multi-book true-odds reference that blends 11 sharp books including Pinnacle, Pin88, BetIsn, and BetDEX into one tighter true-odds line. Drives value-bet edges, halts trades when sharps freeze a market on goals or red cards (5-15 seconds before soft books react), and picks the value leg of every arb so the engine fires the cheaper side first. 28,000+ live events covered across soccer, tennis, basketball, hockey, baseball, NFL, MMA, and more. Pure reference data, no executor.
Weather model ingestion
NewContinuous weather model runs feed stadium-level forecasts (precipitation, wind speed, temperature) into the value-bet engine. Outdoor soccer markets get a weather edge signal 5 to 30 minutes before book lines react to the latest forecast. Pre-line-move conditions are tagged on every relevant match so your strategies fire against the freshest forecast, not the stale one the soft book is still pricing.
News & lineup signals
NewInjury announcements, starting-XI confirmations, manager decisions, and team news parsed in real time. A late lineup change or pre-match injury can move a soccer moneyline or BTTS line 3 to 6 percent in 30 seconds with soft books lagging the sharp response. The agent halts firing on stale lines and queues bets against venues that have not yet repriced. Major European soccer leagues covered.
Per-market predictive AI
NewTrained per-sport, per-market models output a probability estimate for every outcome on every connected market. Combined with the 11-book sharp aggregate and the alternative-data signals, the synthesis produces a fair line that updates faster than any single book. On niche markets where Pinnacle is slow to update, the AI line is the freshest reference available to your value-bet and arb strategies.
Claw Arbs vs third-party odds services
Other arb finders rely on third-party odds APIs that scrape bookmaker pages, process the data, and relay it to you, adding 500-2000ms of delay. Claw Arbs connects directly to venue APIs via WebSocket and sits on bookmaker pages with a headless browser, catching odds changes at the source in ~20ms. By the time a third-party feed updates, your trade is already placed.
How to find arbitrage bets automatically
Connect to sharp and soft sportsbooks
Kalshi, Polymarket, Polymarket US, Predict.fun, SX Bet, Sportmarket, Stake.com, BC.Game, Cloudbet, Bet105, Pinnacle (PS3838), and BetInAsia come pre-installed. Compare sharp bookmaker odds (Sportmarket, Pinnacle, BetInAsia) against soft books and prediction markets to find sure bets and value edges.
Add any bookmaker with community configs
Want more venues? The community shares calibrations: configs that sit directly on a bookmaker's page and catch odds changes in ~20ms via DOM observation. Works with any sportsbook: Bet365, DraftKings, FanDuel, William Hill, and more.
Automated arbitrage and value bet execution
Three engines scan for arbitrage opportunities and value bets across all connected venues. When an edge is found, the bot places both legs of an arb or a single-side value bet, fully automated.
Get Claw Arbs
Claw Arbs is a membership. New members start with a 7-day free trial; alpha members unlock the founding rate with the key from their app. Your download link arrives at checkout and in your welcome email.
Windows, macOS & Linux. 7-day free trial, cancel anytime.
Certified by Microsoft and Apple
Claw Arbs is officially certified by both Microsoft and Apple, confirming the app is safe, virus-free, and published by us.
About antivirus warnings. Because Claw Arbs is an automated trading bot, a few antivirus programs may flag it as a false positive. This is common for any trading automation tool and does not mean the app is unsafe. Microsoft and Apple have already certified it. If your antivirus blocks it, simply add an exception for the install folder.
Windows: If SmartScreen still pops up on first launch, click "More info" then "Run anyway". If Defender removes the file, go to Windows Security → Protection history and restore it.
macOS: If Gatekeeper still asks for confirmation on first launch, open System Settings → Privacy & Security, scroll to the bottom, and click "Open Anyway". You only need to do this once.
Linux: Run chmod +x ClawArbs then ./ClawArbs from terminal. Requires GTK3 + WebKit2GTK.
Your venue credentials are encrypted and stored locally on your device. They are never sent to external servers, only to the venue itself for authentication.
Arbitrage & value betting FAQ
Free Tools
View all →Live Arbitrage Scanner
Real arbs and value bets streaming from the Claw Arbs engine as they are detected.
CalculatorArbitrage & Value Bet Calculator
Sure bet detection, middle finder, Asian handicaps, and no-vig value detection.
SimulatorBankroll Growth Simulator
Monte Carlo sim with animated growth curves and risk of ruin.
ConverterOdds Converter
Decimal, American, fractional, and implied probability. Single or bulk.
CalculatorExpected Value (EV) Calculator
Find your edge, break-even win rate, and EV per bet. Includes CLV mode.
CalculatorKelly Criterion Calculator
Optimal stake sizing with full, half, and quarter Kelly.
CalculatorHedge Bet Calculator
Lock in guaranteed profit on any open bet. Free bet mode included.
CalculatorMatched Betting Calculator
Back/lay calculator for bookmaker bonuses. Qualifying bets and free bet conversion.
CalculatorParlay & SGP Calculator
Parlay builder, round robin, and correlation-aware SGP edge finder.
CalculatorHold & Margin Calculator
See bookmaker vig, compare margins across books, detect arbs.
CalculatorDutching Calculator
Split stakes across selections for equal profit. Up to 20 legs.
From the Blog
View all →Arbitrage Betting Calculator: Free Sure Bet Calculator
Enter your odds, instantly check for sure bets, and get exact stake sizes.
GuideHow to Avoid Sportsbook Limits and Bans (2026)
Round-number stakes, jitter, leg timing, mug betting, and per-venue throttling: the full anti-limiting playbook.
GuideMatched Betting in 2026: The Complete Guide
Free bet conversion math, SNR vs SR offers, the best US and UK bookmakers, and tools to manage account portfolios cleanly at scale.
Get in touch
Questions, feedback, or partnership inquiries.