Data Enrichment Pipeline with Hunter.io + n8n

The Enrichment Problem

You have a list of companies and names. You need verified email addresses. Doing this manually takes forever.

The Automated Pipeline

CSV Upload → n8n Webhook → Hunter.io API → Verification → Clean Output

Step 1: Set Up the Webhook

Create an n8n webhook that accepts CSV data:

// Parse incoming CSV
const rows = $input.all().map(item => ({
  name: item.json.full_name,
  company: item.json.company_domain,
}));
return rows;

Step 2: Find Emails with Hunter.io

For each prospect, call the Email Finder API:

GET https://api.hunter.io/v2/email-finder
  ?domain={{company_domain}}
  &first_name={{first_name}}
  &last_name={{last_name}}
  &api_key=YOUR_KEY

Step 3: Verify Found Emails

Run each email through verification:

GET https://api.hunter.io/v2/email-verifier
  ?email={{found_email}}
  &api_key=YOUR_KEY

Only keep emails with status: "valid" or "accept_all"

Step 4: Score and Output

Add a scoring function:

const confidence = $json.data.confidence;
const status = $json.data.status;

return [{
  json: {
    email: $json.data.email,
    confidence,
    status,
    quality: confidence > 80 ? 'high' : confidence > 50 ? 'medium' : 'low'
  }
}];

Step 5: Export Clean Data

Push verified leads to:

• Google Sheets
• Your CRM
• Your email sending tool

Credit Optimization

Hunter.io charges per request. Save credits by:

1. Checking your existing database first
2. Caching results for 30 days
3. Only verifying emails you plan to use
4. Using domain search for bulk company lookups

Download This Template

This n8n workflow is ready to import. Just add your Hunter.io API key and connect your output destination.