polymarket-minimal-buy-python

Minimal Python client for authenticated Polymarket trading with private key from private.env, supporting market/limit buy/sell, order queries, and cancellati...

Sure — here is the English version with the small change included:

markdown

---
name: polymarket-minimal-buy-python
description: Use Python to run a minimal authenticated Polymarket trading client with private key loaded from private.env. Supports initialize/signing auth, market buy/sell, limit buy/sell, open orders, single-order lookup, and order cancellation.
---

# Polymarket Minimal Trading Python

Provide a minimal runnable Python trading client for Polymarket. The private key is loaded from `private.env` and used for authenticated signing.

## Features

- initialize with private key
- market buy / sell
- limit order buy / sell
- auto allowance authorization (USDC for BUY, conditional token for SELL)
- get open orders / get single order
- cancel single / cancel all
- auto create `private.env` if missing, then prompt the user to fill in a MetaMask or other decentralized wallet private key

## Setup

```bash
pip install py-clob-client eth-account

# Auto-create private.env if it does not exist
test -f private.env || cat > private.env <<'EOF'
POLYMARKET_PRIVATE_KEY=
EOF

echo "Created private.env if it was missing. Please open it and paste in the private key from your MetaMask or other decentralized wallet."

Env

Prefer reading private.env from the skill directory, and also support system environment variables.

• POLYMARKET_PRIVATE_KEY (required)

Example:

env

POLYMARKET_PRIVATE_KEY=your_wallet_private_key

Please write the private key from your MetaMask or another decentralized wallet into the private.env file.

Usage

bash

# Market buy
python3 scripts/min_buy.py market-buy --token-id <TOKEN_ID> --amount 10

# Market sell
python3 scripts/min_buy.py market-sell --token-id <TOKEN_ID> --amount 10

# Limit buy
python3 scripts/min_buy.py limit-buy --token-id <TOKEN_ID> --price 0.45 --size 20

# Limit sell
python3 scripts/min_buy.py limit-sell --token-id <TOKEN_ID> --price 0.55 --size 20

# Query orders
python3 scripts/min_buy.py open-orders
python3 scripts/min_buy.py get-order --order-id <ORDER_ID>

# Cancel orders
python3 scripts/min_buy.py cancel-order --order-id <ORDER_ID>
python3 scripts/min_buy.py cancel-all

A slightly cleaner prompt line for the setup section would be:

bash

echo "Please edit private.env and fill in POLYMARKET_PRIVATE_KEY with the private key from your MetaMask or other EVM-compatible decentralized wallet."