Who’s it for

This workflow is ideal for marketers, CRM managers, support teams, and data verification agents who need to bulk-check WhatsApp numbers without using the official WhatsApp Business API. It helps clean and validate phone number lists from Google Sheets affordably.

Overview

This n8n workflow verifies unlimited WhatsApp numbers from a Google Sheet using your own WhatsApp number through the WasenderAPI.com platform.

How it works / What it does Fetches real-time data from Google Sheets Verifies if a number is registered on WhatsApp Uses delay and batch processing to respect rate limits Updates verification status back to Google Sheets Requirements An active WhatsApp Account (Personal or Business) Google Sheets API configured in n8n Properly structured Google Sheet (sample included) WasenderAPI.com subscription (~$6/month) Google Sheet Format

Use this sample sheet as your base.

WhatsApp No Verified/Unverified Status +8801XXXXXXX (empty) (empty)

Note: Ensure the Status column is blank for unverified rows.

Workflow Highlights Triggers every 5 minutes Reads pending contacts from Google Sheets Verifies WhatsApp numbers using WasenderAPI Updates row status to Checked