Bulk WhatsApp Number Verification via Unofficial API
Bulk WhatsApp Number Verification via Unofficial API Who’s it for This workflow is perfect for marketers, CRM managers, support teams, and data verification agents who need to bulk-check WhatsApp number validity without using the official WhatsApp Business API. It is ideal for teams seeking an affordable and scalable way to clean or validate phone number lists from Google Sheets. 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 Implements delay and batch processing to maintain rate limits Updates verification status back to the Google Sheet Requirements Before setting up the workflow, ensure you have: An active WhatsApp Account (Personal or Business) Google Sheets API configured within your n8n instance A properly structured Google Sheet, like a sample sheet(Included with the workflow template) A WasenderAPI.com subscription (starting from ~$6/month) Google Sheet Format Use this sample sheet as your base. | WhatsApp No | Verified/Unverified | Status | |---------------|---------------------|------------| | +8801XXXXXXX | (empty) | (empty) | > Ensure the Status column is initially blank for unverified rows. How to set up Step 1: Connect to Google Sheets Add a Google Sheets node. Authenticate with your Google account. Select your target document and worksheet. Apply a filter to only select rows where Status is empty. Step 2: Loop Through Rows with Delay Add a SplitInBatches or Code node to process 5 rows at a time. Add a Wait node (set to 5 seconds) between each request to respect API limits. Step 3: Verify Number via HTTP Request Add an HTTP Request node Method: POST URL: https://app.wasenderapi.com/api/send-message Headers: Content-Type: application/json Authorization: Bearer YOUR_API_KEY Workflow Highlights Triggers every 5 Minutes Reads pending contact from Google Sheets Verify WhatsApp number using WasenderAPI or WhatsApp Cloud API Updates each row’s Status to Checked Support & Community Need help setting up or customizing the workflow? Reach out here: WhatsApp: Chat with Support Discord: Join SpaGreen Server Facebook Group: SpaGreen Community Website: SpaGreen Creative Envato: SpaGreen Portfolio. An n8n automation workflow template by SpaGreen Creative.
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