How to Make a Polymarket Bot: Complete 2026 Guide

Polymarket processes over $50 million in weekly volumeacross crypto, politics, sports, and world events. Manual trading means staring at screens all day and missing opportunities while you sleep. A bot trades 24/7, executes instantly, and doesn't panic-sell.

This guide covers two ways to make a Polymarket bot in 2026: a no-code method that takes under 60 seconds (using PredictEngine), and a Python methodfor developers who want full control. Both approaches work with real money on Polymarket's CLOB (Central Limit Order Book).

What Is a Polymarket Bot?

A Polymarket bot is software that automatically buys and sells prediction market shares on your behalf. Polymarket's markets work like stocks: each outcome (YES/NO) has a price between $0.01 and $0.99, and you profit when the price moves in your favor or the event resolves.

Your bot connects to Polymarket's CLOB API (the same orderbook institutional traders use), monitors market prices in real-time, and places buy/sell orders when your strategy conditions are met. All trades happen on the Polygon blockchain using USDC.

Why Make a Polymarket Bot?

Polymarket's rolling crypto markets update every 5, 15, and 60 minutes. That's 288 trading opportunities per day on a single market. With 4 crypto assets and multiple timeframes, manually tracking everything is impossible.

Method Comparison: No-Code vs Python

Method 1: No-Code Bot with PredictEngine

The fastest way to make a Polymarket bot. PredictEngine's AI builder turns plain English into a working trading bot. No Python, no APIs, no server setup.

1Create Your Free Account

Sign up at PredictEngine. You get 1,500 free credits immediately plus 250 daily credits. No credit card required. Takes 30 seconds.

2Open the AI Bot Builder

In your dashboard, click "AI Builder". This is PredictEngine's AI strategy generator — you describe what you want in plain English, and it creates a fully configured bot.

3Describe Your Strategy

Tell the AI what you want your bot to do. Here are real prompts that work:

4Review, Fund, and Launch

The AI generates your bot with all parameters configured: entry/exit prices, stop loss, position sizes, slippage tolerance, and market selection. Review the settings and click "Create Bot".

You can run your bot in simulation mode first (virtual money, real market data) to test your strategy before funding with real USDC. When ready, deposit USDC to your PredictEngine wallet and switch to live trading.

Method 2: Python Bot (Developer Guide)

For developers who want full control. You'll use Polymarket's official Python SDK (py-clob-client) to interact with the CLOB API directly.

1Prerequisites

• Python 3.9+ installed
• A Polygon wallet with USDC (you need USDC.e on Polygon)
• Polymarket API credentials (get from docs.polymarket.com)

2Install Dependencies

pip install py-clob-client python-dotenv web3

3Configure Your Environment

Create a .env file with your Polymarket API credentials:

PRIVATE_KEY=your_wallet_private_key_without_0x
POLY_API_KEY=your_api_key
POLY_API_SECRET=your_api_secret
POLY_API_PASSPHRASE=your_passphrase

4Write Your Bot

Here's a working Polymarket bot that buys when price drops below a target and sells when it rises above a target:

import os, time
from dotenv import load_dotenv
from py_clob_client.client import ClobClient
from py_clob_client.clob_types import OrderArgs, OrderType, ApiCreds

load_dotenv()

# === CONFIG ===
CHAIN_ID = 137  # Polygon
HOST = "https://clob.polymarket.com"

# Your strategy parameters
TOKEN_ID = "YOUR_TOKEN_ID"     # Get from Polymarket market URL
BUY_BELOW = 0.40               # Buy when price drops below 40c
SELL_ABOVE = 0.55               # Sell when price rises above 55c
TRADE_SIZE = 50                 # Number of shares per trade

# === SETUP CLIENT ===
private_key = os.getenv("PRIVATE_KEY")
creds = ApiCreds(
    api_key=os.getenv("POLY_API_KEY"),
    api_secret=os.getenv("POLY_API_SECRET"),
    api_passphrase=os.getenv("POLY_API_PASSPHRASE"),
)
client = ClobClient(HOST, key=private_key, chain_id=CHAIN_ID, creds=creds)

def get_midpoint(token_id: str) -> float:
    """Get current midpoint price from orderbook."""
    book = client.get_order_book(token_id)
    best_bid = float(book.bids[0].price) if book.bids else 0
    best_ask = float(book.asks[0].price) if book.asks else 1
    return (best_bid + best_ask) / 2

def buy(token_id: str, price: float, size: int):
    """Place a buy order."""
    order = client.create_order(
        OrderArgs(price=price, size=float(size), side="BUY", token_id=token_id)
    )
    resp = client.post_order(order, OrderType.GTC)
    print(f"BUY {size} shares @ ${price:.2f} -> {resp}")
    return resp

def sell(token_id: str, price: float, size: int):
    """Place a sell order."""
    order = client.create_order(
        OrderArgs(price=price, size=float(size), side="SELL", token_id=token_id)
    )
    resp = client.post_order(order, OrderType.GTC)
    print(f"SELL {size} shares @ ${price:.2f} -> {resp}")
    return resp

# === MAIN LOOP ===
holding = False
print(f"Bot started. Buy < ${BUY_BELOW}, Sell > ${SELL_ABOVE}")

while True:
    try:
        price = get_midpoint(TOKEN_ID)
        print(f"Price: ${price:.3f} | Holding: {holding}")

        if not holding and price < BUY_BELOW:
            buy(TOKEN_ID, round(price + 0.02, 2), TRADE_SIZE)
            holding = True

        elif holding and price > SELL_ABOVE:
            sell(TOKEN_ID, round(price - 0.02, 2), TRADE_SIZE)
            holding = False

        time.sleep(10)  # Check every 10 seconds

    except KeyboardInterrupt:
        print("Bot stopped.")
        break
    except Exception as e:
        print(f"Error: {e}")
        time.sleep(30)

5Run Your Bot

python polymarket_bot.py

For 24/7 operation, deploy on a VPS (DigitalOcean, AWS, etc.) or use a service like QuantVPS. Run inside tmux or screen so it persists after SSH disconnects.

Bot Strategies That Actually Work

Your bot is only as good as its strategy. Here are the proven approaches on Polymarket in 2026:

Costs and Fees

Common Mistakes to Avoid

Frequently Asked Questions