Polymarket Scanner (Free Edition)

Scan 10,000+ prediction markets for mispricings using the public Polymarket Gamma API.

Quick Start

pip install requests
python polymarket_scanner.py

No API key needed. No authentication required.

What It Does

• Exclusive Outcome Scanner — Detects when mutually exclusive outcomes (elections, tournaments) don't sum to 100%
• Ladder Contradiction Detector — Finds logical impossibilities in threshold markets (e.g., "BTC > $100K" priced higher than "BTC > $90K")

Example Output

=== Polymarket Scanner (Free Edition) ===
Fetching events...
  500 events, 8000 markets

Scanning exclusive outcomes...
  3 high-confidence opportunities

Scanning ladder contradictions...
  12 contradictions found

--- Ladder Contradictions ---
  #1 Bitcoin above ___ on March 16?
     $68,000 @ 67.50% vs $72,000 @ 31.50%
     Deviation: 36.0%, Liq: $19,341

REST API

Don't want to run code locally? Use the Polymarket Scanner API — a hosted REST endpoint that returns arbitrage opportunities as JSON:

curl https://polymarket-scanner-api.onrender.com/api/scan

Free tier: 3 requests/day. Pro ($29/mo): unlimited.

Full Version

The full Polymarket Scanner Toolkit ($29) adds:

• Cross-market logical implication analysis — Finds inconsistencies between related markets across events
• Bidirectional ladder detection — HIGH and LOW threshold scanning
• Confidence scoring system — Automatically classifies exclusive vs. non-exclusive outcomes
• Scheduled monitoring with alerting — Run 24/7 and get notified of new opportunities
• Extensible architecture — Dataclass-based design, easy to add custom strategies
• 3 ready-to-use examples — Basic scan, scheduled monitoring, ladder monitor

Requirements

• Python 3.10+
• requests

License

MIT — free for personal and commercial use.