Market Making bots
Liquidity-providing bots that quote both sides of a market and earn the spread while staying delta-neutral.
PolyTraderBot
Six self-hosted Polymarket bots from one developer, sold separately at $10 a month each and delivered as full source with a browser dashboard, tests and a Docker setup for your own PC or VPS. CopyBot follows wallets you choose, or candidates it ranks from Polymarket's public leaderboard, with fixed, proportional or Kelly-fraction sizing, ten-plus individually switchable guards and exits that follow the leader out. Crypto5min and Crypto15min trade the 5- and 15-minute up/down windows on BTC, ETH, SOL, XRP, DOGE, BNB and HYPE from tree-based models retrained every 60 or 90 minutes. ARB scans the order books for binary YES and NO asks that sum to less than $1 after fees. WeatherBot prices temperature buckets from a weighted blend of Open-Meteo models, NWS, NOAA and Met.no forecasts and compares the result with the live asks. PolyLiq rests two-sided quotes in the markets that pay Polymarket's liquidity rewards, or takes over the resting orders you placed yourself. Every bot starts with real orders switched off, keeps the wallet key in a local env file and, from the current releases, updates itself from its own dashboard. The vendor advertises no returns; a free Polymarket terminal from the same developer is in beta on the same domain.
Olympus
Polymarket web terminal built around copy trading that keeps running on Olympus's servers after you close the tab. Every followed wallet gets its own ratio, trade and market caps, odds, liquidity and volume filters, a price-deviation guard and a limit mode that buys at the leader's own fill price, with stop-loss, take-profit, counter-trading and combo copying; a backtest replays the leader's history through those exact settings first, and separate trading wallets keep strategies apart. Around the copier: a manual terminal with a sports hub, crypto price windows, combos and TP/SL on any position; Bonds, which ranks every outcome priced 97¢ or more by what it pays after fees, and Autobond, which buys them inside a budget and a loss limit; an LP Rewards desk that places maker orders on Polymarket's reward markets; Polymarket Perps to 20x and Dimes Multiply positions to 10x; and a REST trading API with wallet-scoped keys. The base fee is 0.75% per executed trade, sliding toward zero at extreme prices. Built by the team behind SOL Decoder and Valhalla.
Kairos
Cross-venue trading terminal that merges Kalshi, Polymarket and Predict.fun into one order book. Matching contracts on different exchanges are shown as a single instrument with a composite ladder and a global best bid and offer, so you can see which venue is actually cheapest before you send, and an order to the NBBO endpoint routes to whichever book shows that price. Feeds are ingested next to the venues and merged in the browser with no polling interval; the ticket carries GTC, GTD, FOK, FAK and IOC time-in-force, post-only and slippage caps, with batch cancel and a per-venue kill switch. A bots panel runs parameterised templates — market making, cross-venue arbitrage, dip buying — against recorded books first and promotes the same config to live. The same engine is exposed as a REST and WebSocket API with scoped keys, IP whitelisting and a free read-only market-data tier. Built by a team from high-frequency trading firms and exchanges and backed by a $2.5M seed led by a16z.
PredictEngine
No-code bot builder that hosts and runs Polymarket strategies for you. You describe a rule in plain English — “buy BTC UP when it dips below $0.40” — or pick a template, and the platform writes the bot, provisions a dedicated Polygon wallet, signs the orders and keeps it running 24/7 on its own infrastructure, with a dashboard, a Discord bot and a mobile terminal to watch it. Templates cover single-side entries, cross-market arbitrage, copy trading that mirrors chosen wallets, market making and sports value against bookmaker lines; a marketplace lets users publish bots for others to run. The free plan runs five live bots; $9 a month unlocks the AI builder, 25 bots and backtesting; $49 adds an unlimited builder and 25% lower trading fees. The docs list Limitless and Predict.fun alongside Polymarket. The wallet is generated and encrypted on their side and the private key is exportable at any time.
Kuest
Open-source white-label infrastructure for launching your own Polymarket-style exchange — the team calls it the Shopify for prediction markets. A guided no-code flow takes a branded site live in about 15 minutes on your own domain, with shared liquidity synced from live Polymarket order flow so the books aren't empty on day one, and a 0.5–3% per-trade fee you set yourself, paid straight to your wallet. Runs on Polygon with USDC settlement, ships Python and Rust SDKs compatible with existing Polymarket tooling, and the entire TypeScript stack is public on GitHub with 1,000+ stars.
Virae AI
AI trading terminal for Polymarket, in private beta: market discovery with live trending topics and order-book prices, a whale leaderboard ranking tracked wallets by PnL, volume, win rate and Sharpe with one-click copy tasks, and seven trading Agents across four strategy types — end-of-round BTC/ETH price-distance, pre-market maker ladders, weather-model probabilities and Musk tweet counts. Agents watch every eligible round and only place orders when sizing, liquidity and entry rules all pass; each ships with recorded paper performance clearly labelled as simulation, and the strategy-evaluation core is open source on GitHub. Turnkey-backed non-custodial wallets, web app plus Telegram bots, and a separate Solana memecoin terminal.
PolyPilot
PolyPilot scans eligible Polymarket crypto markets, estimates probability, checks executable prices and liquidity, applies account controls, and manages positions from an always-on worker. Users control status, positions, pause, resume and support from Telegram. A dedicated Polymarket wallet is provisioned for the user; its encrypted private key is exportable. No profit guarantee.
PolyData
Analytics workspace and trading terminal for Polymarket. Track positions, liquidity and market flow in real time, analyze any wallet's PnL, exposure and win rate from live on-chain data, rank top traders on a leaderboard, and execute in a focused terminal — from market signal to order entry in one place.
Predikt
DeFi infrastructure protocol that unifies prediction markets into one layer. Aggregates 500k+ markets across venues, tokenizes idle positions into composable DeFi assets, and routes execution through a solver-based, intent-driven engine — all behind a single API and SDK. Cross-chain (Solana & Sui); largely in beta.
Predictefy
Institutional-grade infrastructure across every prediction market venue. Matches identical markets on Polymarket, Kalshi, Hyperliquid, Limitless and more, then streams cross-venue arbitrage — spread, size, liquidity and route — in real time. Ships a market-data API, SDK, smart order router, MCP server and agent CLI, plus historical data back to 2020.
PolymarketAlpha
Autonomous AI agents that scan, analyze and execute on Polymarket across sports, crypto (5m, 15m, 1h) and weather markets — no manual intervention. Backed by a custom-built desk that also ships professional on-chain Solana bots (MEV, arbitrage, sniping and market making).
Polybot (No-Code)
No-code Chrome extension for building automated Polymarket trading bots right in your browser. Spin up a bot from any event page with one click, add stop-loss and take-profit orders, or run the Fair Value market-making bot with a configurable target probability — no coding required.
Poly-Maker
Open-source market-making bot for Polymarket. Quotes both sides of the book over WebSockets with configurable spreads, position merging and risk controls. Shared by its author as a reference implementation, not a turnkey money-maker.
PolyScreener
Real-time market screener for prediction markets. Scans 19,000+ Polymarket and Kalshi markets with live volume and liquidity metrics, category filters and volume thresholds so you can surface the most active, liquid opportunities fast.
HashDive
Advanced analytics for Polymarket and Kalshi. HashDive's proprietary Smart Scores rank how consistent and profitable a trader is, alongside a market screener, wallet tracking and candlestick charts with RSI, MACD and whale-volume breakdowns.
Polymarket Analytics
On-chain analytics and dashboards for Polymarket. Pulls every trade, wallet and position on-chain into searchable tables, trader leaderboards ranked by win rate and PnL, live volume discovery and consolidated position tracking.
Polyburg
Smart-wallet tracking terminal and official Polymarket build partner. Streams a live feed of profitable-trader activity, ranks top wallets daily and layers AI-powered signals, win-rate and ROI metrics so you can see what smart money is buying before everyone else notices.
Probably
Social prediction-market trading platform powered by Polymarket. Trade outcomes across topics, earn rewards and play alongside friends. Currently invite-only with a waitlist for early access.
Robin Markets
DeFi yield layer for Polymarket positions. Stake your YES/NO tokens and earn a guaranteed 6%+ APY while keeping full market exposure — Robin pairs opposite sides into delta-neutral positions, claims the collateral and routes USDC into DeFi lending across 900+ markets.
Stand
Advanced trading terminal and aggregator for prediction markets. Pulls Polymarket and Kalshi into one trade-first interface with live volume, liquidity and open interest, whale copy-trading, TP/SL and stop orders, and an Octobox that watches up to eight markets at once. Non-custodial via Privy, no fees on manual orders.
PolySpy
Telegram bot for instant alerts on brand-new Polymarket markets. Fires notifications the moment markets are created — filtered by category (politics, sports, crypto, finance, tech, culture, geopolitics) with subcategory and ignore-tag controls — so you can take a first-mover position before the crowd.
PolyScalping
Real-time scanner and reward analytics for Polymarket. Surfaces scalping opportunities as they appear and shows the full-wallet math Polymarket hides — tracking LP rewards, maker rebates, referral rewards and yield payouts, with leaderboards and an LP dashboard.
How market-making bots work on Polymarket
A market-making bot posts both a bid and an ask around a market's fair probability and earns the spread whenever both sides trade. It doesn't predict outcomes — it gets paid for standing in the middle and keeping the book liquid.
On Polymarket, makers can also earn liquidity rewards on eligible markets, which can turn even a spread-neutral book into positive expectancy. The bot's real job is everything around the quotes: repricing continuously as probability moves, and keeping inventory close to neutral so one resolution can't wipe out weeks of spread income.
What to look for in a market-making bot
Inventory management is the whole game. Check how the bot skews quotes once it accumulates one side, whether it widens or pulls quotes around scheduled news, and whether it understands Polymarket's liquidity-rewards parameters. Hard position limits are non-negotiable — a maker bot without them is a liability the first time a market gaps. If the author publishes fill rates and adverse-selection stats, that's a strong signal they know what they're doing.
Frequently asked questions
- Is market making on Polymarket profitable?
- It can be — spread income plus liquidity rewards is a real edge on liquid markets. The cost is adverse selection: informed traders hitting your stale quotes right before the price moves. Profitability lives or dies on repricing speed and inventory control.
- How much capital does market making need?
- More than most strategies. You hold inventory on both sides of every market you quote, and returns scale roughly with the capital deployed. Starting on one or two liquid markets keeps the requirement manageable.
- What is adverse selection?
- Getting filled precisely when you're wrong — someone with better information lifts your quote moments before the probability moves against you. Good maker bots minimize it by repricing fast, widening around events and cutting size when flow turns one-sided.
Guides to market making
All guidesWhat is a Polymarket trading bot? How they work, what they do, and what they can't
A plain-English explainer: what a Polymarket bot actually is, the seven things every one of them does, the main types — copy trading, arbitrage, market making, minute-market and news bots — what they cost, and the limits nobody puts on the landing page.
6 minAug 21, 2026How to build a Polymarket trading bot: a step-by-step guide
From an idea to a bot that runs unattended: picking a strategy you can actually test, the architecture (discovery, data, strategy, risk, execution, reconciliation), paper trading, deployment, and the mistakes that sink first bots — using Polymarket's APIs and unified SDKs as they are in 2026.
6 minAug 21, 2026The Polymarket API explained: CLOB, Gamma, Data API and WebSockets — and what changed in V2
A map of every Polymarket API a bot touches — Gamma for discovery, the CLOB for prices and orders, the Data API for positions and trades, WebSockets for live updates — plus authentication, order types, the taker-fee formula, rate limits and the 2026 V2 changes that broke older bots.
6 minAug 21, 2026Polymarket API with Python: from pip install to your first order
The 2026 way, with the unified polymarket-client SDK: create a secure client from a private key and wallet address, read a market, place a limit order and a market order, wait for settlement, list positions — and the gotchas (tick size, GTD expiry, geoblock, rate limits, the archived py-clob-client) that stop first scripts.
4 minAug 21, 2026What a Polymarket bot really costs: software, fees, spread, hosting, capital — and why the price tag is the smallest line
The full cost stack behind 'free' and '$49 one-time': the software, Polymarket's taker fee by category, the spread and slippage you pay every crossing, hosting and data, gas, the capital a strategy ties up — with worked break-even numbers for a minute-market bot, a copy-trading tool and a market maker.
4 minAug 21, 2026Polymarket arbitrage: the four kinds, why the edge vanishes, and what it costs to chase
What arbitrage means on a prediction market — outcome sets priced under a dollar, multi-outcome books that don't sum, the same event priced differently on Kalshi — why those gaps appear, the fee and capital maths that decide whether a bot can take them, and the execution risks (legging, resolution mismatch) that turn a sure thing into a loss.
5 minAug 21, 2026