Polymarket Openclaw Trading Bot

Polymarket OpenClaw Trading Bot

Skill by ara.so — Hermes Skills collection.

A TypeScript/Node.js trading bot for Polymarket prediction markets using the CLOB (Central Limit Order Book) API. Specializes in short-duration BTC markets (5m/15m windows) with rule-based strategies, optional OpenClaw AI decision layer, strict risk management, and real-time market polling.

What This Bot Does

• Market Selection: Automatically constructs Polymarket market slugs from coin + period (e.g., BTC + 5m)
• Price Polling: Fetches real-time UP/DOWN outcome token prices from Gamma/CLOB API
• Strategy Execution: Runs configurable trade_1 or trade_2 strategies with entry/exit rules
• OpenClaw AI Layer: Optional deterministic decision engine for signal experimentation
• Order Management: Submits market orders via CLOB v2 with retry logic and cooldowns
• Authentication: L1 wallet signing to derive API credentials, L2 authenticated trading client
• Risk Controls: Cooldowns, position limits, emergency swaps, balance validation

Installation

git clone https://github.com/Predictly-MCP-Labs/polymarket-openclaw-ai-btc-arbitrage-trading-bot.git
cd polymarket-openclaw-ai-btc-arbitrage-trading-bot
npm install

Prerequisites:

• Node.js ≥ 20.6
• Polygon wallet with private key
• USDC balance on Polygon for trading
• Polymarket account with funder/proxy address

Environment Configuration

Create .env file (never commit this):

# Required wallet credentials
POLYMARKET_PRIVATE_KEY=0x...  # Your wallet private key
POLYMARKET_FUNDER_ADDRESS=0x...  # Funder/deposit proxy address

# Optional signature type (defaults to proxy-friendly)
POLYMARKET_SIGNATURE_TYPE=POLY_PROXY  # EOA | POLY_PROXY | POLY_GNOSIS_SAFE | POLY_1271

Environment Variable Reference:

• POLYMARKET_PRIVATE_KEY: Wallet private key for signing CLOB operations (required)
• POLYMARKET_FUNDER_ADDRESS: Address holding trading collateral (required)
• PROXY_WALLET_ADDRESS: Alternate alias for funder address
• POLYMARKET_SIGNATURE_TYPE: Signature method for your account type

Strategy Configuration (trade.toml)

The bot uses TOML for strategy configuration:

# Core strategy settings
strategy = "trade_1"  # or "trade_2"
trade_usd = 10.0      # Notional per buy in USD
max_retries = 3       # Retries for transient errors
entry_buy_cooldown_sec = 30  # Pause after failed entry

# Market selection
[market]
market_coin = "btc"    # btc | eth | sol | xrp
market_period = "5"    # 5 | 15 | 60 | 240 | 1440 (minutes)

# trade_1 strategy: time/price exits
[trade_1]
buy_range_start_pct = 40  # Enter when price is 40-60%
buy_range_end_pct = 60
exit_time_pct = 80        # Exit at 80% of window elapsed
exit_price_min_pct = 55   # Only exit if price >= 55%
emergency_swap_enabled = false

# trade_2 strategy: ratio-based
[trade_2]
entry_ratio_min = 1.05
entry_ratio_max = 1.25
exit_ratio_threshold = 0.95
exit_time_emergency_pct = 90
emergency_swap_enabled = true

# Optional OpenClaw AI decision layer
[openclaw]
enabled = false       # Set true to activate
mode = "deterministic"  # deterministic | http
min_edge_bps = 50     # Minimum edge in basis points
max_spread_bps = 200  # Maximum allowed spread
lookback_points = 12  # Price history window

# Optional HTTP/LLM integration
# [openclaw.http]
# url = "https://your-openclaw-service.example.com/decide"
# bearer_token = "optional_token"
# timeout_ms = 2500

Running the Bot

# Development mode with hot reload
npm run dev

# Production build and run
npm run build
npm start

Key Code Patterns

Initialize CLOB Client and Authenticate

import { ClobClient } from "@polymarket/clob-client";
import { Wallet } from "ethers";

// Create wallet from private key
const wallet = new Wallet(process.env.POLYMARKET_PRIVATE_KEY!);

// Initialize CLOB client
const clobClient = new ClobClient(
  "https://clob.polymarket.com",  // host
  137,  // Polygon chain ID
  wallet,
  {
    funderAddress: process.env.POLYMARKET_FUNDER_ADDRESS,
    signatureType: parseInt(process.env.POLYMARKET_SIGNATURE_TYPE || "1")
  }
);

// Derive or create API credentials
const apiCreds = await clobClient.deriveApiKey();
console.log("API Key:", apiCreds.apiKey);

Fetch Market Data

import { getMarket } from "./services/gamma";

// Build market slug from config
const coin = config.market.market_coin;  // "btc"
const period = config.market.market_period;  // "5"
const slug = `will-btc-close-higher-in-${period}-minutes`;

// Fetch market metadata
const market = await getMarket(slug);
console.log("Market ID:", market.id);
console.log("Condition ID:", market.condition_id);
console.log("Tokens:", market.tokens);  // [UP token, DOWN token]

Poll Prices and Execute Strategy

import { Trade } from "./trade/trade";

// Create trade instance
const trade = new Trade(
  clobClient,
  config.trade_usd,
  config.max_retries,
  config.entry_buy_cooldown_sec
);

// Update prices (fetches from CLOB)
await trade.updatePrices(
  market.tokens[0].token_id,  // UP token
  market.tokens[1].token_id   // DOWN token
);

// Make trading decision based on strategy
import { make_trading_decision } from "./trade/decision";

const decision = await make_trading_decision(
  trade,
  config.strategy,
  config.trade_1,
  config.trade_2,
  market.end_date_iso
);

console.log("Decision:", decision);

Place Market Order

// Buy UP token
const buyResult = await trade.buy(
  market.tokens[0].token_id,  // UP token ID
  "UP"
);

if (buyResult.success) {
  console.log("Buy successful:", buyResult.orderId);
} else {
  console.error("Buy failed:", buyResult.error);
}

// Sell position
const sellResult = await trade.sell("UP");
if (sellResult.success) {
  console.log("Sell successful:", sellResult.orderId);
}

Strategy Decision Logic (trade_1)

import { TradeAction } from "./trade/decision";

function evaluateTrade1Strategy(
  trade: Trade,
  config: Trade1Config,
  endTimeIso: string
): TradeAction {
  const now = Date.now();
  const endTime = new Date(endTimeIso).getTime();
  const timeElapsedPct = ((now - (endTime - 5 * 60 * 1000)) / (5 * 60 * 1000)) * 100;

  const upPrice = trade.upPrice;
  const downPrice = trade.downPrice;

  // Entry logic: price in range, not already holding
  if (!trade.hasBought) {
    const priceInRange = 
      upPrice >= config.buy_range_start_pct &&
      upPrice <= config.buy_range_end_pct;

    if (priceInRange) {
      return { action: "BUY_UP", reason: "Price in entry range" };
    }
    return { action: "HOLD", reason: "Waiting for entry conditions" };
  }

  // Exit logic: time threshold or price target
  const shouldExitTime = timeElapsedPct >= config.exit_time_pct;
  const shouldExitPrice = upPrice >= config.exit_price_min_pct;

  if (shouldExitTime && shouldExitPrice) {
    return { action: "CLOSE_POSITION", reason: "Time and price exit met" };
  }

  return { action: "HOLD", reason: "Holding position" };
}

OpenClaw Decision Integration

import { getOpenClawDecision } from "./trade/openclaw";

if (config.openclaw.enabled) {
  const openclawDecision = await getOpenClawDecision(
    trade,
    {
      upPrice: trade.upPrice,
      downPrice: trade.downPrice,
      timeToExpiry: (new Date(market.end_date_iso).getTime() - Date.now()) / 1000,
      hasBought: trade.hasBought,
      positionSide: trade.positionSide
    },
    config.openclaw
  );

  console.log("OpenClaw signal:", openclawDecision.action);
  console.log("Reason:", openclawDecision.reason);
}

Error Handling with Retry Logic

import { retryOnTransient } from "./utils/retry";

async function placeOrderWithRetry(
  clobClient: ClobClient,
  tokenId: string,
  side: "BUY" | "SELL",
  size: number,
  maxRetries: number
) {
  return retryOnTransient(
    async () => {
      const order = await clobClient.createMarketOrder({
        tokenID: tokenId,
        side,
        amount: size.toString()
      });

      const result = await clobClient.postOrder(order);
      return result;
    },
    maxRetries,
    (error) => {
      // Check if error is transient (network, 5xx, 429)
      const isTransient = 
        error.message.includes("ECONNRESET") ||
        error.message.includes("429") ||
        error.message.includes("5xx");
      return isTransient;
    }
  );
}

Common Trading Workflows

Setup and Run for BTC 5-Minute Markets

1. Configure .env with wallet credentials
2. Edit trade.toml:

   [market]
   market_coin = "btc"
   market_period = "5"
   
   strategy = "trade_1"
   trade_usd = 5.0
   

3. Run: npm run dev
4. Monitor logs for entry/exit signals

Switch to 15-Minute Markets

Change only the period in trade.toml:

[market]
market_period = "15"

Enable OpenClaw AI Decision Layer

[openclaw]
enabled = true
mode = "deterministic"
min_edge_bps = 50
max_spread_bps = 200
lookback_points = 12

Run Multiple Strategies Simultaneously

Run separate processes with different configs:

# Terminal 1: 5-minute BTC
cp trade.toml trade-5m.toml
# Edit trade-5m.toml: market_period = "5"
CONFIG_PATH=trade-5m.toml npm run dev

# Terminal 2: 15-minute BTC
cp trade.toml trade-15m.toml
# Edit trade-15m.toml: market_period = "15"
CONFIG_PATH=trade-15m.toml npm run dev

Module Reference

Troubleshooting

"Invalid BytesLike" Error

Cause: Malformed POLYMARKET_PRIVATE_KEY

Fix: Ensure private key starts with 0x and is 64 hex characters:

POLYMARKET_PRIVATE_KEY=0xabcdef1234567890...

Orders Not Filling

Possible causes:

• Insufficient USDC balance on funder address
• Market moved before order posted
• Spread too wide (max_spread_bps exceeded)

Debug:

const balance = await clobClient.getBalance();
console.log("USDC balance:", balance.usdc);

console.log("Current spread:", Math.abs(trade.upPrice - trade.downPrice));

Entry Cooldown Blocking Trades

Expected behavior: After a failed buy, bot waits entry_buy_cooldown_sec before retrying

Adjust: Lower cooldown in trade.toml:

entry_buy_cooldown_sec = 10  # Instead of 30

OpenClaw Not Triggering

Check:

1. [openclaw].enabled = true in trade.toml
2. Mode is "deterministic" or "http" with valid endpoint
3. Logs show "OpenClaw signal:" messages

Debug:

console.log("OpenClaw config:", config.openclaw);
console.log("Edge BPS:", calculatedEdge);

API Authentication Failures

Symptoms: "401 Unauthorized" or "Invalid signature"

Fix:

1. Verify POLYMARKET_SIGNATURE_TYPE matches your account:
   • EOA for standard wallets
   • POLY_PROXY for Polymarket proxy accounts
2. Regenerate API credentials:

   const newCreds = await clobClient.createApiKey();
   

Market Not Found

Error: Market slug not found

Cause: Coin/period combination doesn't match active Polymarket markets

Fix: Verify active markets at polymarket.com and adjust:

[market]
market_coin = "btc"  # Check available coins
market_period = "5"  # Check available periods

Advanced Patterns

Custom Decision Logic

Extend decision engine with custom strategy:

// src/trade/customStrategy.ts
export function customDecision(
  trade: Trade,
  customConfig: any
): TradeAction {
  // Your custom logic
  const momentum = calculateMomentum(trade.priceHistory);
  
  if (momentum > customConfig.momentum_threshold) {
    return { action: "BUY_UP", reason: "Strong upward momentum" };
  }
  
  return { action: "HOLD", reason: "Waiting for momentum" };
}

// Register in decision.ts
import { customDecision } from "./customStrategy";

if (config.strategy === "custom") {
  return customDecision(trade, config.custom);
}

Monitor Multiple Markets

const markets = [
  { coin: "btc", period: "5" },
  { coin: "eth", period: "5" },
  { coin: "btc", period: "15" }
];

for (const market of markets) {
  const slug = buildSlug(market.coin, market.period);
  const marketData = await getMarket(slug);
  
  // Run parallel trading loops
  runMarketLoop(marketData, config);
}

Backtesting Strategy

import { Trade } from "./trade/trade";

async function backtestStrategy(
  historicalData: PricePoint[],
  config: TomlConfig
) {
  const results = [];
  
  for (const dataPoint of historicalData) {
    const trade = new Trade(mockClient, config.trade_usd, 1, 0);
    trade.upPrice = dataPoint.upPrice;
    trade.downPrice = dataPoint.downPrice;
    
    const decision = await make_trading_decision(
      trade,
      config.strategy,
      config.trade_1,
      config.trade_2,
      dataPoint.endTime
    );
    
    results.push({ time: dataPoint.time, decision });
  }
  
  return results;
}

Safety and Compliance

• Start small: Use low trade_usd values initially
• Paper trading: Test strategies without real orders first
• Risk limits: Respect max_retries and cooldowns
• Market risk: 5m/15m windows move fast; fills may not match signals
• Regulatory: Ensure compliance with local prediction market regulations
• API limits: CLOB has rate limits; bot includes retry backoff

Key Search Terms

Polymarket trading bot, Polymarket CLOB API, Polymarket arbitrage bot, BTC 5 minute Polymarket, BTC 15 minute Polymarket, TypeScript prediction market bot, Polymarket API credentials, OpenClaw AI trading, Polymarket wallet setup, CLOB order execution