feat: add market alert script

scripts/market_alert.py

@@ -0,0 +1,32 @@
+"""
+Monitor a specific market and alert when the YES price crosses a threshold.
+
+Set MARKET_TICKER and PRICE_THRESHOLD environment variables.
+"""
+
+import os
+import time
+from kalshi_python import KalshiClient, Configuration  # type: ignore
+
+TICKER = os.getenv("MARKET_TICKER", "TEMP-DEMO-1")
+THRESHOLD = float(os.getenv("PRICE_THRESHOLD", "0.75"))
+
+def build_client():
+    cfg = Configuration(host=os.getenv("KALSHI_API_HOST", "https://api.elections.kalshi.com/trade-api/v2"))
+    cfg.api_key_id = os.getenv("KALSHI_API_KEY_ID")
+    with open(os.getenv("KALSHI_PRIVATE_KEY_PATH"), "r", encoding="utf-8") as f:
+        cfg.private_key_pem = f.read()
+    return KalshiClient(cfg)
+
+def main() -> None:
+    client = build_client()
+    while True:
+        market = client.markets_api.get_market(TICKER).market  # type: ignore
+        yes_price = market.yes_price
+        if yes_price >= THRESHOLD:
+            print(f"Alert: {TICKER} YES price {yes_price} >= threshold {THRESHOLD}")
+            break
+        time.sleep(60)
+
+if __name__ == "__main__":
+    main()