Validate leads email addresses with Hunter.io and Google Sheets
How it works: This project automatically verifies lead email addresses stored in Google Sheets using Hunter.io. It checks each email’s validity and writes back the results—including confidence scores, verification status, and metadata—so your outreach lists are always clean and reliable. This workflow runs daily, reads from a source sheet, verifies emails via API, and writes results into another sheet. No manual checking. No wasted leads. Step-by-step: - Schedule Trigger: The workflow is schedul
At a glance
Validate leads email addresses with Hunter.io and Google Sheets is a ready-made n8n workflow you import as a workflow JSON file — no build required. It connects Google Sheets. It's free to download. Follow the 5-step import below to go live in minutes.
- Platform
- n8n
- Connects
- Google Sheets
- Modules
- 6
- Price
- Free
- Version
- v1.0

About this workflow
How it works: This project automatically verifies lead email addresses stored in Google Sheets using Hunter.io. It checks each email’s validity and writes back the results—including confidence scores, verification status, and metadata—so your outreach lists are always clean and reliable. This workflow runs daily, reads from a source sheet, verifies emails via API, and writes results into another sheet. No manual checking. No wasted leads. Step-by-step: - Schedule Trigger: The workflow is scheduled to run automatically once per day, but you can also run it manually when needed. - Fetch Emails: Reads emails from a Google Sheet (named Sheet1) with columns like Email, FirstName, LastName, and Company. - Data Cleaning: Filters out blank or invalid email formats before verification to save API usage. - Hunter.io Verification: Each email is passed to Hunter.io’s /email-verifier API, returning status (valid, invalid, risky), SMTP check, score (0–100), and disposable flag. - Format Results: The API response is converted into a human-readable summary like: ✅ Valid (96% confidence) or ❌ Invalid / Risky - Write to Sheet: The verified results are written back into your output Google Sheet—either appending new rows or updating existing ones. Setup instructions: - Google Sheet: Use a sheet named Sheet1 and ensure it includes these columns: Email, FirstName, LastName, Company. - Hunter.io Key: Sign up at hunter.io. Go to Dashboard → API → Copy your key In n8n, open the Email Verifier node → Create Credential → Paste your API key → Save
How to import this n8n workflow
- 1
Download the workflow JSON file after purchase.
- 2
Open n8n → click the menu → Import from File.
- 3
Select the downloaded JSON and import.
- 4
Set up credentials for each node that requires them.
- 5
Click Execute Workflow to test, then activate.
Setup guide
Setup guide included
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- JSON blueprint — instant download
- Setup guide PDF included
- 5 downloads · valid 30 days
- Works with n8n
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