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Polymarket API

Query Polymarket prediction markets. Use for questions about prediction markets, betting odds, market prices, event probabilities, or when user asks about Polymarket data.

Danny Shmueli

@dannyshmueli

What This Skill Does

Queries Polymarket prediction markets for real-time betting odds, market prices, event probabilities, and market data using the public Polymarket API with no authentication required. Supports searching markets by keyword, fetching top markets by volume, and retrieving specific markets or event groups.

Replaces manual browsing of Polymarket's website or building custom API integrations by providing a simple command-line interface to access prediction market data.

When to Use It

  • Search Polymarket for prediction markets related to a specific topic or keyword
  • Fetch the top prediction markets by 24-hour trading volume
  • Retrieve current Yes/No prices and implied probabilities for a specific market
  • List all events (grouped markets) on Polymarket
  • Get detailed market data including volume and price history for analysis

Install

$ openclaw skills install @dannyshmueli/polymarket-api

Polymarket

Query prediction market data from Polymarket's public API (no auth required).

Quick Start

# Top markets by 24h volume
python3 scripts/polymarket.py --top

# Search markets
python3 scripts/polymarket.py --search "trump"

# Get specific market by slug
python3 scripts/polymarket.py --slug "will-trump-win-the-2024-election"

# List events (grouped markets)
python3 scripts/polymarket.py --events

Script Location

skills/polymarket/scripts/polymarket.py

API Endpoints

The script uses gamma-api.polymarket.com:

  • /markets - Individual markets with prices, volumes
  • /events - Event groups containing related markets

Output Format

Markets show: question, Yes/No prices (as percentages), 24h volume, total volume.

Interpreting Prices

  • outcomePrices are 0-1 representing probability
  • Price of 0.65 for "Yes" = market thinks 65% chance of Yes
  • Higher volume = more liquid, more reliable signal

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