Video Chapters
0:00 Build a Lead Enrichment Workflow | AI Automation with n8n | Capstone Project - Part 01
0:00 How to Enrich Leads Automatically Using Hunter IO and n8n - Capstone Project - Part 02
0:00 Enrich Leads Automatically in n8n [Capstone Project] | How to create PDF in n8n - Capstone Project - Part 03
Lesson 35 · 5. Hands-On Projects · Last updated · By Dheeraj Sharma

Lead Enrichment Capstone

Learn Lead Enrichment Capstone in this comprehensive n8n tutorial. Step-by-step guide with video, code examples, and expert tips from the n8n Zero to Hero course.

Table of Contents

Overview

This lesson is part of the n8n AI Automation - Zero to Hero course, Section: 5. Hands-On Projects.

Watch the video above for the full tutorial, or read the written guide below.

What is the n8n Lead Enrichment Capstone and what does it automate?

The Lead Enrichment Capstone is a three-part n8n workflow that automates the entire inbound lead lifecycle: form capture, dual-stage email validation, company enrichment, lead scoring, CRM deduplication, team routing, PDF summary generation, and follow-up scheduling. It replaces a multi-person manual process involving interns, business analysts, sales teams, and managers with a single n8n workflow that processes each lead without human intervention at every routine step.

How to set up the n8n Form Trigger and two-stage email validation pipeline

The n8n Form Trigger node generates a hosted web form inside your n8n workspace, producing a test URL for development and a production URL that activates only after the workflow is set to active. Configure the form with six fields: name (text, required), email (required), company name (required), website (optional), job title (optional), and interest area (dropdown with multi-select, required). Pin the test submission data immediately after the first successful submit so you avoid re-filling the form on every subsequent build step.

The IF node named "basic email validation" runs two n8n built-in functions as AND-joined conditions: .isEmail() confirms the field contains a structurally valid email format, and .extractDomain() extracts the domain so it can be checked against an array of blacklisted disposable-email services such as fake-mail and temp-mail. Any lead failing this gate is logged to a Google Sheets node configured to append a row to the "All Leads Log" sheet with the timestamp (using the now expression), full name, email, company name, status set to "discarded," and reason set to "basic email validation failed."

The Hunter.io node, available natively in n8n, runs the "email verifier" operation against the lead's email address and returns a status field and a numeric confidence score. A second IF node named "third party email validation" then checks that status equals "valid" (with case-insensitive comparison and type conversion enabled) AND that score is greater than 20. Leads failing either condition are appended to the same "All Leads Log" sheet with reason "third party email validation failed, invalid status of the email and/or low email deliverability score," keeping a complete audit trail before the workflow continues to company enrichment in parts two and three.

Key Takeaways

  • The n8n Form Trigger node replaces a Google Forms plus webhook setup during development; switch to the production URL and activate the workflow when connecting to a live website form.
  • The IF node's built-in .isEmail() and .extractDomain() functions perform format checking and domain blacklisting without any custom code or external HTTP calls.
  • Hunter.io's native n8n node returns both a status field (the primary signal, replacing the deprecated result field) and a numeric score; the capstone uses status = "valid" AND score > 20 as the minimum combined threshold.
  • Every discarded lead at any validation stage gets appended to the Google Sheets "All Leads Log" with a timestamped reason string, creating a durable rejection record that prevents the same bad lead from consuming pipeline resources again.
  • Part one of the capstone completes automation of steps one and two from the original manual process (form intake and email validation), eliminating the intern and sales-ops roles responsible for those tasks.

Next Steps

Continue your n8n journey with the full n8n AI Automation - Zero to Hero course.

Frequently Asked Questions

The n8n Form Trigger node generates a hosted web form with two URLs: a test URL usable immediately in development mode and a production URL that only becomes active after the workflow is switched to active. Use the test URL while building and validating each downstream node. Switch to the production URL when wiring the form into a live website, replacing tools like Google Forms connected via webhook.

The IF node uses two n8n built-in expression functions joined with AND logic. The `.isEmail()` function returns a boolean confirming the field holds a structurally valid email address. The `.extractDomain()` function pulls the domain portion of the email so it can be compared against an array of known disposable-email domains such as fake-mail and temp-mail. Every condition must return true before the lead proceeds to Hunter.io verification.

The third-party email validation IF node checks two fields from the Hunter.io verifier response: `status`, which must equal "valid" (compared case-insensitively with type conversion enabled), and `score`, a numeric confidence value that must be greater than 20. Hunter.io has deprecated the `result` field in favor of `status`, so `status` serves as the primary pass/fail signal and `score` acts as a secondary quality threshold.

The Google Sheets logging step mirrors the manual business process requirement: the intern or assistant was expected to record every rejected lead with a reason so the sales team would never waste time re-processing the same bad contact. The Google Sheets node appends a row to the "All Leads Log" sheet with a timestamp, lead details, status "discarded," and a specific reason string identifying which validation stage failed, giving sales ops a searchable rejection history.

Dheeraj Sharma

Dheeraj Sharma

AI Systems Builder
Creator of the n8n Zero to Hero course (42 lessons, 31+ hours). I help solopreneurs build AI systems that grow revenue without growing workload.

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