This article provides a complete, practical walkthrough of the Hunter Form Send Webhook n8n agent. It connects HTTP Request, Webhook across approximately 1 node(s). Expect a Intermediate setup in 15-45 minutes. One‑time purchase: €29.

What This Agent Does

This agent orchestrates a reliable automation between HTTP Request, Webhook, handling triggers, data enrichment, and delivery with guardrails for errors and rate limits.

It streamlines multi‑step processes that would otherwise require manual exports, spreadsheet cleanup, and repeated API requests. By centralizing logic in n8n, it reduces context switching, lowers error rates, and ensures consistent results across teams.

Typical outcomes include faster lead handoffs, automated notifications, accurate data synchronization, and better visibility via execution logs and optional Slack/Email alerts.

How It Works

The workflow uses standard n8n building blocks like Webhook or Schedule triggers, HTTP Request for API calls, and control nodes (IF, Merge, Set) to validate inputs, branch on conditions, and format outputs. Retries and timeouts improve resilience, while credentials keep secrets safe.

Third‑Party Integrations

• HTTP Request
• Webhook

Import and Use in n8n

1. Open n8n and create a new workflow or collection.
2. Choose Import from File or Paste JSON.
3. Paste the JSON below, then click Import.
4. Show n8n JSON

   Title:
   Automated Smart Lead Qualification with n8n, MadKudu, Hunter, Gmail, and HubSpot
   
   Meta Description:
   Learn how to build a powerful lead qualification and outreach workflow using n8n, MadKudu, Hunter.io, Gmail, and HubSpot. Automatically verify emails, score leads, and send personalized follow-ups—all without writing code.
   
   Keywords:
   n8n workflow, lead qualification, Hunter.io, MadKudu, HubSpot CRM, Gmail automation, lead scoring, email automation, sales automation, marketing automation
   
   Third-Party APIs Used:
   
   - Hunter.io API (for email verification)
   - MadKudu API (for lead scoring)
   - Gmail (Gmail API for automated outreach)
   - HubSpot API (CRM and engagement tracking)
   
   Article:
   
   🔎 Smart Lead Qualification & Outreach Using n8n: The No-Code Way to Close High-Quality Leads
   
   In the world of B2B sales and marketing, staying responsive while qualifying leads quickly can make the difference between winning and losing business. Enter n8n: a powerful, low-code workflow automation tool. Combined with tools like MadKudu, Hunter.io, Gmail, and HubSpot, you can now build a fully automated lead qualification and outreach pipeline. No manual work needed—just automation, intelligence, and scale.
   
   In this article, we’ll walk through a smart lead routing workflow that automatically:
   
   ✅ Collects email leads through a web form  
   ✅ Verifies the email’s validity using Hunter.io  
   ✅ Scores the lead using MadKudu  
   ✅ Enriches and stores the lead data in HubSpot  
   ✅ Sends a personalized email via Gmail  
   ✅ Logs the interaction back into HubSpot CRM
   
   Let’s dive into how it works.
   
   🛠 Step-by-Step Setup with n8n
   
   The foundation of this automation is a workflow built in n8n. Here's how it all fits together:
   
   1. Collect Leads via Web Form  
   The workflow begins with an n8n Form Trigger, where users submit their business emails through a "Contact Us" form. You could replace this with any third-party forms like Typeform or Google Forms.
   
   2. Verify Email Validity (Hunter.io)  
   Once the form is submitted, the email is sent to Hunter.io for validation. If the email isn’t valid, the automation halts—no one wants to waste time or resources on bounced emails.
   
   3. Qualify the Lead (MadKudu)  
   For valid emails, we query the MadKudu API to get a customer fit score. This service uses existing data to predict how likely the lead is to convert. Leads with a score over 60 are deemed valuable and worthy of follow-up.
   
   4. Pass Qualified Leads to HubSpot  
   Next, we log into HubSpot CRM and record the contact if they’re a good fit. This ensures that your internal sales team has immediate access to important information, and it sets the stage for future engagement.
   
   5. Send Personalized Outreach (Gmail)  
   The lead receives a tailored email from Mutasem at n8n. This is powered by Gmail’s API. The content is customizable and includes a Calendly link for booking a demo or call—streamlining the next step in the sales funnel.
   
   6. Record Email Engagement in HubSpot  
   Finally, the outreach email and metadata (e.g., subject, body, recipient) are recorded in HubSpot under the corresponding contact. This allows sales reps to track engagement and follow up more effectively.
   
   📋 Flow Logic Summary
   
   - User submits email via web form
   - Email is checked for validity using Hunter.io
   - If valid, MadKudu scores the lead
   - If score > 60, the lead is enriched in HubSpot
   - An outreach email is sent via Gmail
   - The email engagement is recorded in HubSpot
   
   ❌ Edge Case Handling: Smart Exit Paths
   
   Not all leads are created equal. This workflow includes smart logic to avoid wasting resources on unqualified or fake emails. Invalid entries or low-score leads are automatically excluded from further automation paths — saving time and effort for your sales team.
   
   🎨 Customization Options
   
   This workflow is designed as a smart scaffold, and it’s fully customizable:
   
   - Swap out the n8n Form Trigger with any third-party form tool  
   - Edit the scoring logic to match your unique sales criteria  
   - Adjust the outreach message in Gmail to reflect changes in campaigns  
   - Add more actions like Slack notifications or nurturing drip campaigns
   
   🤝 Integrations at a Glance
   
   Here are the major third-party integrations used in this workflow:
   
   - 🔗 Hunter.io — Validates the lead’s email so that you're not targeting invalid addresses.  
   - 📊 MadKudu — Assigns a customer fit score based on predictive models, helping focus only on high-potential leads.  
   - 📬 Gmail — Sends automated, personalized emails that feel human, not spammy.  
   - 📁 HubSpot — Stores leads and logs engagements for full CRM visibility.
   
   🚀 Why This Matters
   
   Manual lead qualification is error-prone and slow. By automating your outreach with intelligence, you:
   
   - Save time for your sales and marketing teams  
   - Increase response rates with targeted outreach  
   - Improve CRM hygiene and engagement insights  
   - Scale your lead pipeline without burning out your team
   
   🧠 Final Thoughts
   
   This n8n workflow showcases how modern businesses can use automation not just to save time, but to become smarter and more strategic in how they approach lead management.
   
   Whether you're a solo marketer or part of a growing startup team, automating lead flows with tools like n8n, MadKudu, Hunter.io, and HubSpot can be the edge that drives your growth.
   
   Want to build it yourself? All you need are the right API keys and about 20 minutes to set it up—all with zero actual coding.
   
   📨 Happy automating!

5. Set credentials for each API node (keys, OAuth) in Credentials.
6. Run a test via Execute Workflow. Inspect Run Data, then adjust parameters.
7. Enable the workflow to run on schedule, webhook, or triggers as configured.

Tips: keep secrets in credentials, add retries and timeouts on HTTP nodes, implement error notifications, and paginate large API fetches.

Validation: use IF/Code nodes to sanitize inputs and guard against empty payloads.

Why Automate This with AI Agents

AI‑assisted automations offload repetitive, error‑prone tasks to a predictable workflow. Instead of manual copy‑paste and ad‑hoc scripts, your team gets a governed pipeline with versioned state, auditability, and observable runs.

n8n’s node graph makes data flow transparent while AI‑powered enrichment (classification, extraction, summarization) boosts throughput and consistency. Teams reclaim time, reduce operational costs, and standardize best practices without sacrificing flexibility.

Compared to one‑off integrations, an AI agent is easier to extend: swap APIs, add filters, or bolt on notifications without rewriting everything. You get reliability, control, and a faster path from idea to production.

Best Practices

• Credentials: restrict scopes and rotate tokens regularly.
• Resilience: configure retries, timeouts, and backoff for API nodes.
• Data Quality: validate inputs; normalize fields early to reduce downstream branching.
• Performance: batch records and paginate for large datasets.
• Observability: add failure alerts (Email/Slack) and persistent logs for auditing.
• Security: avoid sensitive data in logs; use environment variables and n8n credentials.

FAQs

Can I swap integrations later? Yes. Replace or add nodes and re‑map fields without rebuilding the whole flow.

How do I monitor failures? Use Execution logs and add notifications on the Error Trigger path.

Does it scale? Use queues, batching, and sub‑workflows to split responsibilities and control load.

Is my data safe? Keep secrets in Credentials, restrict token scopes, and review access logs.