Polymarket Arbitrage Trading Bot: Open-Source Crypto Bot

What Is Polymarket Arbitrage Trading Bot?

Polymarket Arbitrage Trading Bot is a TypeScript crypto trading bot built by CoreGuideLab for Polymarket binary markets. It automates UP/DOWN price polling, rule-based trade selection, and order execution for developers, quant traders, and operators, and it targets five market windows from 5m to 1d. Polymarket Arbitrage Trading Bot is one of the best Crypto Trading Bots tools for TypeScript developers and Polymarket operators.

The project is not a generic exchange bot. It is narrowly shaped around Polymarket's CLOB API, market metadata from Gamma API, and a strategy file in trade.toml that drives the execution loop. That focus makes Polymarket Arbitrage Trading Bot easier to audit than a multi-exchange engine, especially when you want deterministic rules instead of black-box signal generation.

Quick Overview

Who Should Use Polymarket Arbitrage Trading Bot?

Polymarket Arbitrage Trading Bot fits teams and solo builders who want direct control over Polymarket order flow without building a full market-making stack from scratch.

• TypeScript-first engineers who want a bot they can read, modify, and ship from a single Node.js codebase.
• Polymarket traders who need rule-based entries and exits on binary crypto markets instead of discretionary manual clicking.
• Indie hackers building a niche trading workflow around trade.toml and a dedicated proxy wallet.
• Ops-minded developers who want live status output, retry handling, and a clear separation between config, strategy, and execution.

Not ideal for:

• Traders who need portfolio-level risk management, cross-exchange hedging, or multi-asset allocation logic.
• Teams that want a GUI-first product with dashboards, backtesting reports, and one-click cloud deployment.
• Anyone uncomfortable managing a private key, proxy wallet address, and live order execution against a production market.

Key Features of Polymarket Arbitrage Trading Bot

Polymarket Arbitrage Trading Bot is built around a small number of deterministic trading primitives rather than a broad feature surface.

• Market window selection — The bot selects active contracts by coin and period, with support for btc, eth, sol, and xrp across 5m, 15m, 1h, 4h, and 1d windows. That keeps the market universe constrained and predictable.
• Live UP/DOWN price polling — It continuously polls bid and ask prices for both UP and DOWN tokens, which is the minimum data needed to decide whether a binary market is worth entering or exiting. The runtime output also prints a trend legend so operators can see state at a glance.
• Two strategy modes — trade_1 exits positions on either elapsed time ratio or UP price ratio, while trade_2 uses a stricter entry band, an exit range, and an optional emergency swap path. These are not generic indicators; they are explicit rule sets in trade.toml.
• Order execution with retry logic — The bot posts market orders through the Polymarket CLOB API and retries failed attempts up to the configured limit. Balance confirmation is part of the flow, which matters when fills are asynchronous or partial.
• TOML-based configuration — Runtime behavior lives in trade.toml, not in compiled code. That makes it easier to tune trade_usd, max_retries, and strategy thresholds without editing the TypeScript source.
• Node.js 20 runtime — The project requires Node.js >= 20.6.0, which means modern ESM support, current tooling compatibility, and a clean path for tsx-based development. That is the right baseline for a new TypeScript bot, not a legacy compromise.
• Operational visibility — The bot prints the current public key, active strategy, market window, and trade amount at startup. For live trading, that saves time when you are validating whether the process loaded the expected account and market.

Polymarket Arbitrage Trading Bot vs Alternatives

Polymarket Arbitrage Trading Bot is strongest when you want a narrow, auditable Polymarket-specific engine. If you want a broader market-making framework, a different tool is a better fit.

Pick Hummingbot if you need a larger exchange abstraction layer and are not tied to Polymarket. Pick Freqtrade if your priority is strategy research, backtesting, and Python-centric trading ops rather than a dedicated Polymarket execution loop.

Pick OctoBot if you want a broader retail trading interface and can trade off some code-level transparency. If you want to pair this bot with deployment or workflow automation, djevops is a better companion than another trading engine.

If you need orchestration across multiple automated agents or services, OpenSwarm can sit above the bot as the control layer. If the surrounding workflow needs machine identity or signing discipline, MachineAuth is more relevant than a second trading framework.

How Polymarket Arbitrage Trading Bot Works

Polymarket Arbitrage Trading Bot works as a small event loop that binds three pieces together: market discovery, price evaluation, and order execution. The design is intentionally direct, with src/config/ handling environment and TOML validation, src/services/ handling external API calls, and src/trade/ handling the strategy rules and order logic.

The core abstraction is a live market snapshot that combines market metadata, current bid/ask data, and the chosen strategy thresholds. From there, the bot evaluates either trade_1 or trade_2, decides whether the state meets an entry or exit condition, and then sends a market order through the Polymarket CLOB API with retry handling and balance confirmation.

npm install
cat > .env <<'EOF'
POLYMARKET_PRIVATE_KEY=your_private_key
PROXY_WALLET_ADDRESS=your_proxy_wallet_address
EOF
npm run dev

The commands above install dependencies, create the wallet variables the bot needs, and start the development runtime through tsx. After launch, the process prints the active strategy, selected market window, and trade size so you can confirm the configuration before the first order is sent.

The architecture favors explicit rules over inference. That means less magic and fewer hidden dependencies, but it also means the bot only does what trade.toml describes, which is exactly what you want when live funds are involved.

Pros and Cons of Polymarket Arbitrage Trading Bot

Pros:

• Clear execution path — The bot separates config loading, market polling, strategy evaluation, and order submission, which makes debugging easier than in monolithic trading code.
• Polymarket-native focus — It speaks directly to the Polymarket CLOB workflow instead of hiding exchange details behind a generic adapter.
• Two explicit strategy modes — trade_1 and trade_2 cover time-driven exits and range-based entry/exit logic without requiring a custom strategy engine.
• Low-friction configuration — trade.toml and .env keep operational tuning out of the TypeScript source tree.
• TypeScript stack — Teams already using Node.js can extend the bot without switching languages or building a Python sidecar.
• Live operator feedback — The status legend and startup header reduce the chance of running the wrong market or wallet unnoticed.

Cons:

• Single-venue scope — Polymarket Arbitrage Trading Bot is tied to Polymarket, so it is not the right base if you need cross-exchange routing.
• Strategy surface is narrow — Only two strategy modes are documented, which is fine for focused execution but not enough for complex quant research.
• No visible backtesting layer — The page text describes live trading behavior, not offline simulation or historical validation.
• Manual secret handling — You must manage a private key and proxy wallet address, which adds operational risk if your local environment is sloppy.
• Limited market selection — The supported coins and periods are explicit, so the bot is not trying to trade every available instrument on the platform.

Getting Started with Polymarket Arbitrage Trading Bot

Polymarket Arbitrage Trading Bot gets started with a standard Node.js install, a local .env, and a trade.toml file that defines the strategy thresholds. The quickstart is short because the bot expects you to already know which market, coin, and time window you want to trade.

# requires Node.js 20.6.0+
git clone https://github.com/CoreGuideLab/polymarket-arbitrage-trading-bot
cd polymarket-arbitrage-trading-bot
npm install

cat > .env <<'EOF'
POLYMARKET_PRIVATE_KEY=your_private_key
PROXY_WALLET_ADDRESS=your_proxy_wallet_address
EOF

# edit trade.toml, then start the bot
npm run dev

After the first run, verify that the startup output shows the expected public key, strategy, and market window. If the bot cannot authenticate or resolve the market config, check the proxy wallet address, the private key, and the strategy, market_coin, and market_period values in trade.toml.

For a production rollout, build first with npm run build and then run the compiled output with npm start. That path is better when you want stable deployment behavior rather than the fast reload loop from tsx.

Verdict

Polymarket Arbitrage Trading Bot is the strongest option for Polymarket-specific, rule-based automation when you want TypeScript control over order flow and market timing. Its biggest strength is the simple trade.toml strategy model; its main caveat is the narrow scope and live-wallet operational risk. Pick it if you want direct execution, not a full trading platform.