polymarket-sports-arbitrage

# Sports Arbitrage Scanner A ClawHub automaton skill that continuously monitors sports betting odds from multiple bookmakers, identifies arbitrage opportunities, and reports guaranteed-profit trade setups. ## How Arbitrage Works An arbitrage opportunity exists when the sum of implied probabilities across all outcomes of a match (using the best available odds from any bookmaker) is less than 1.0. This means you can stake proportionally on all outcomes and lock in a profit no matter who wins. Implied probability of outcome = 1 / decimal_odds Arb exists when: sum(1/odds_i for all outcomes) < 1.0 Profit % = (1 - sum_of_implied_probs) / sum_of_implied_probs * 100 Stake for outcome i = (total_stake / odds_i) / sum_of_implied_probs ## Environment Variables ODDS_API_KEY (optional) API key for The Odds API (https://the-odds-api.com). Free tier allows ~500 requests/month. If not set, the skill falls back to built-in sample/demo data so it can still demonstrate functionality. MIN_PROFIT_PCT (optional, default: 0.5) Minimum profit percentage to report. Arbs below this threshold are silently filtered out. Increase to reduce noise, decrease to surface more marginal arbs. TOTAL_STAKE (optional, default: 1000) Hypothetical total stake amount (in your currency) used to compute the concrete stake split per outcome. Purely illustrative — adjust to your bankroll. SPORTS (optional, default: soccer_epl,basketball_nba,americanfootball_nfl) Comma-separated list of sport keys to scan. Valid sport keys are documented at https://the-odds-api.com/sports-odds-data/sports-apis.html RESULTS_FILE (optional, default: /tmp/sports_arb_results.json) Path where the JSON results file is written after each scan run. ## Output Each detected arbitrage opportunity is logged to stdout and appended to the JSON results file. The JSON schema per opportunity: { "match": "Team A vs Team B", "sport": "soccer_epl", "commence_time": "2026-03-21T15:00:00Z", "profit_pct": 1.23, "total_implied_prob": 0.9879, "outcomes": [ { "name": "Team A", "bookmaker": "pinnacle", "odds": 2.10, "implied_prob": 0.4762, "stake": 476.19, "potential_return": 1000.00 }, ... ], "total_stake": 1000, "guaranteed_return": 1012.30, "detected_at": "2026-03-21T03:00:00Z" }