Custom API Health Checks
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import time
import requests

def handler(event, context):
    target_endpoint = "https://api.yourdomain.com/v1/health"
    start_time = time.time()
    
    try:
        response = requests.get(target_endpoint, timeout=5)
        duration_ms = round((time.time() - start_time) * 1000)
        
        # 1. Assert status code
        if response.status_code != 200:
            raise Exception(f"Unexpected HTTP {response.status_code}: {response.text[:200]}")
            
        # 2. Assert payload contents
        data = response.json()
        if data.get("database") != "connected":
            raise Exception(f"Database degraded: {data}")
            
        print(f"✅ Healthcheck Passed: {duration_ms}ms latency.")
        return {"status": "healthy", "duration_ms": duration_ms}
        
    except Exception as e:
        # LiteLambda captures uncaught exceptions and dispatches failure alerts!
        print(f"🚨 Outage Detected: {str(e)}")
        raise e