Verify WhatsApp numbers in bulk using Google Sheets & WasenderAPI

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

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 n...

Best for

Lead Generation automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.splitinbatches, n8n-nodes-base.wait, n8n-nodes-base.limit, n8n-nodes-base.scheduletrigger, n8n-nodes-base.stickynote, n8n-nodes-base.if, n8n-nodes-base.googlesheets, n8n-nodes-base.httprequest

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by SpaGreen Creative.

Original n8n.io source

1.1 Workflow description

Title: Verify WhatsApp numbers in bulk using Google Sheets & WasenderAPI
Workflow name: Verify WhatsApp numbers in bulk using Google Sheets & WasenderAPI

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

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Loop Over Items

Type / Role: n8n-nodes-base.splitInBatches - splitInBatches
Config choices: Version 3

Block 2 - Wait

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 3 - Limit

Type / Role: n8n-nodes-base.limit - limit
Config choices: Version 1

Block 4 - Trigger Every 5 Minute

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.2

Block 5 - Sticky Note1

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 6 - If

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2.2

Block 7 - Fetch All Pending Contacts for Verifing

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 8 - Verify WhatsApp Number Using HTTP Request

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 9 - Set Status

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 10 - Set Status1

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 11 - Change State of Rows in Checked

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

3. Summary Table

Workflow	Verify WhatsApp numbers in bulk using Google Sheets & WasenderAPI
Complexity	intermediate
Nodes	11
Categories	Lead Generation
Author	SpaGreen Creative
Published	19 Jul 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/6183/6183.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Lead Generation workflows

Frequently asked questions

What does Verify WhatsApp numbers in bulk using Google Sheets & WasenderAPI do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Lead Generation use case.

SpaGreen Creative

60 workflows

Nodes

n8n-nodes-base.splitinbatches n8n-nodes-base.wait n8n-nodes-base.limit n8n-nodes-base.scheduletrigger n8n-nodes-base.stickynote n8n-nodes-base.if n8n-nodes-base.googlesheets n8n-nodes-base.httprequest

Complexity

intermediate

Published 19 Jul 2025

Likes 0

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Install path: /data/workflows/6183/6183.json

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Verify WhatsApp numbers in bulk using Google Sheets & WasenderAPI

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Bulk WhatsApp Number Verification via Unofficial API

Who’s it for

Overview

How it works / What it does

Requirements

Google Sheet Format

How to set up

Step 1: Connect to Google Sheets

Step 2: Loop Through Rows with Delay

Step 3: Verify Number via HTTP Request

Workflow Highlights

Support & Community

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Loop Over Items

Block 2 - Wait

Block 3 - Limit

Block 4 - Trigger Every 5 Minute

Block 5 - Sticky Note1

Block 6 - If

Block 7 - Fetch All Pending Contacts for Verifing

Block 8 - Verify WhatsApp Number Using HTTP Request

Block 9 - Set Status

Block 10 - Set Status1

Block 11 - Change State of Rows in Checked

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions