n8n is a self-hosted workflow automation platform that connects HailTrace, ATTOM Data, BatchSkipTracing, and outreach tools through a visual workflow canvas. For storm lead generation, n8n executes the same logic as the Make.com scenario demonstrated in the Storm Lead AI Machine — but with the added flexibility of custom code nodes, self-hosted infrastructure, and unlimited workflow executions without per-operation pricing.
The n8n Storm Lead Workflow Architecture
The workflow begins with a Schedule trigger that polls the HailTrace API every 30 minutes. When the HTTP Request node returns a qualifying event (hail size above the configured threshold in a monitored territory), a Set node extracts the storm swath GeoJSON polygon and event metadata. An HTTP Request node sends the polygon to ATTOM Data's property search endpoint, returning all residential properties inside the swath. An Iterator node processes each property record through a BatchSkipTracing HTTP call to append the verified mobile number and email. An OpenAI node runs the AI scoring prompt — passing hail size, roof age, property value, and owner status — returning a score from 0 to 100. Properties scoring above the threshold are routed to GoHighLevel via the GHL API to create contact records and pipeline opportunities, and to Twilio for voicemail drop delivery.
Code Node Flexibility
n8n's JavaScript code nodes handle the polygon intersection logic, deduplication against previously contacted properties, and score weighting customization that no-code tools don't support natively. For storm lead systems running multiple markets simultaneously, n8n's ability to parallelize webhook flows across territories without additional cost makes it the preferred platform for high-volume deployments. The same logical pipeline using Make.com for faster setup is demonstrated at omnionlinestrategies.com/storm-lead-ai-machine.