modbender name: polymarket_trader description: A skill to securely execute trades on the Polymarket CLOB via a Python script. tools:
- name: place_polymarket_order
description: Places a limit order on a specified Polymarket market.
args:
- name: market_slug type: string description: The slug of the market (e.g., 'trump-out-as-president-by-march-31').
- name: direction type: string description: "The outcome to bet on. Must be 'Yes' or 'No'."
- name: price type: number description: The price for the limit order (e.g., 0.50). Must be between 0.01 and 0.99.
- name: size type: number description: The size of the order in shares (e.g., 10). exec:
This command chain securely passes arguments as environment variables to the script
after activating the virtual environment. This prevents shell injection vulnerabilities.
command: > source ../../polymarket_venv/bin/activate && export MARKET_SLUG='{{market_slug}}' && export DIRECTION='{{direction}}' && export PRICE={{price}} && export SIZE={{size}} && python trade.py
Polymarket Trader Skill
This skill provides a tool to place trades on Polymarket.
Security
This skill is designed to be secure. It reads the private key from the POLYMARKET_PRIVATE_KEY environment variable and reads all trade parameters as environment variables to prevent shell injection.
Setup
This skill requires a Python virtual environment named polymarket_venv located in the OpenClaw workspace root.
The environment must have the following packages installed:
py-clob-clientrequests
It also requires the POLYMARKET_PRIVATE_KEY environment variable to be set for the OpenClaw user.
Tools
place_polymarket_order
This tool is a wrapper around the trade.py script. It allows the agent to place trades by providing the market slug, direction, price, and size.