n8n Lead Qualification: GPT-4o Webhook → Gmail & Google Sheets

Instant lead triage with GPT-4o: Webhook → Gmail & Google Sheets

This n8n workflow automatically receives new lead enquiries on a /lead webhook, enriches and scores them using an OpenAI GPT-4o agent, then routes results to the right place—sending priority emails via Gmail or logging leads into Google Sheets.

What this workflow does

• Receives inbound enquiries via a POST webhook request to /lead.
• Attaches your ideal-customer rules & urgency signals to the payload so every lead is evaluated consistently.
• Enriches with a GPT-4o agent by orchestrating an enrich_lead sub-workflow that extracts only knowable facts from the enquiry.
• Scores the lead through a score_lead sub-workflow, returning:
  • a 1–10 fit score
  • an urgency flag
  • reasoning based on the enrichment and your ideal-customer rules
• Routes leads by fit and urgency:
  • High-scoring or urgent leads get a priority email via Gmail to the workflow owner.
  • Mid-scoring leads are appended to a nurture list in Google Sheets with key details and the score.
  • Low-scoring / out-of-scope leads receive a polite decline email to the enquirer via Gmail.

Use cases

• Your website or app submits enquiries to /lead, and sales gets only prioritized, high-fit leads.
• Marketing nurture automation: mid-fit leads are captured in Google Sheets for follow-up campaigns.
• Lead quality control: low-fit enquiries get a fast, respectful decline email to reduce manual work.

Technical details

• Nodes/tools: set, webhook, Gmail tool, google sheets tool, n8n-nodes-langchainagent (GPT-4o agent), plus workflow scaffolding like Sticky Note.
• OpenAI: configure an OpenAI credential; ensure the orchestrator uses GPT-4o with your preferred temperature.
• Sub-workflows: connect enrich_lead and score_lead, and paste their workflow IDs into the corresponding tool configurations.
• Gmail routing: replace owner@example.com with the inbox receiving priority leads.