AI Lead Qualification n8n Workflow: GPT-4o + Gmail/Google Sheets

Turn every inbound lead into an action—automatically qualify, score, and route with your n8n workflow

This AI Lead Qualification n8n Workflow: GPT-4o + Gmail/Google Sheets receives enquiries via a webhook, uses GPT-4o to enrich and score each lead against your ideal customer profile, then instantly routes leads to the right next step using Gmail or Google Sheets.

What this workflow does

• Receives inbound enquiries through a POST webhook on /lead.
• Attaches your ICP rules (ideal/good/poor/decline criteria and urgent signals) to the webhook payload.
• Orchestrates qualification with an OpenAI GPT-4o agent: it first calls an enrichment sub-workflow, then a scoring sub-workflow to produce a fit score (1–10) and an urgency flag.
• Routes high-scoring or urgent leads by sending a Gmail notification email to the owner for same-day follow-up.
• Routes mid-scoring leads by appending a row to a Google Sheets nurture list.
• Routes low-scoring or out-of-scope leads by sending a polite decline email via Gmail back to the enquirer.

Use cases

• Automatically triage leads from your website/contact form—no manual review needed.
• Notify your sales owner in real time when a lead meets your “urgent” criteria.
• Build a structured nurture pipeline by writing qualified leads into Google Sheets.
• Send fast, consistent “decline” responses for leads outside your ideal customer profile.

Technical details

• n8n nodes/tools used: set, webhook, gmail tool, google sheets tool, n8n-nodes-langchainagent, plus a sticky note.
• OpenAI integration: add OpenAI credentials for the GPT-4o chat model used by the orchestrator agent.
• Sub-workflows: connect enrich_lead and score_lead sub-workflows and set their workflowId values in the template.
• Routing targets: configure Gmail owner destination email and set the Google Sheets documentId and sheetName.

Perfect for n8n users, automation engineers, and SaaS operators who want reliable AI lead qualification with clear next actions.