Qualify Inbound Leads with GPT-4o-mini in n8n + Sheets + Slack

Automatically qualify inbound leads using GPT-4o-mini in n8n—then notify Slack and return a JSON response

This n8n workflow accepts lead submissions from a webhook, validates and enriches them with an OpenAI Chat Completions qualification score (using GPT-4o-mini), logs the result (simulated Sheets/CRM write), and sends an alert to Slack—all in one streamlined flow.

What this workflow does

• Receives inbound leads via a webhook endpoint (configured with the path lead-capture) sent as a POST request containing at least email and name.
• Validates and normalizes data: required fields are checked, optional fields like company and source are normalized, and a timestamp is added to the lead record.
• Qualifies the lead with OpenAI: the workflow calls OpenAI Chat Completions to generate a JSON qualification score, reasoning, and a suggested action.
• Applies qualification logic: the lead is marked as qualified when the score is 7 or higher, and a processed timestamp is added.
• Logs the result: it produces a simulated “write to Google Sheets/CRM” result (replace this with a real Sheets/CRM node if desired).
• Notifies your team in Slack: sends a formatted message through a Slack incoming webhook.
• Returns a success payload as a JSON response to the original webhook requester.

Use cases

• SaaS teams that want to triage inbound form leads instantly and reduce manual review.
• Automation engineers building lead qualification pipelines in n8n with OpenAI-driven scoring.
• Ops workflows that need a Slack alert whenever a lead is qualified (score ≥ 7).

Technical details

• n8n nodes/tools: code, webhook, http request, respond to webhook
• OpenAI integration: OpenAI Chat Completions using GPT-4o-mini (via API key or n8n OpenAI credential)
• Slack integration: Slack Incoming Webhook
• Google Sheets/CRM: simulated logging step (swap for a real Sheets/CRM node in your setup)

Setup highlights: configure the webhook URL (path lead-capture), add your OpenAI authorization, and replace the placeholder Slack webhook URL.