This n8n workflow automates the process of verifying multiple WhatsApp numbers using an unofficial API, ensuring efficient validation of contact data at regular intervals. Designed for use with Google Sheets, it fetches pending contacts, verifies their WhatsApp status via HTTP requests, and updates their verification status in the sheet, making it ideal for organizations managing large contact lists.
The workflow begins with a schedule trigger that runs every five minutes, ensuring regular checking of pending contacts. It fetches all pending contact entries from Google Sheets, then limits the batch size to control processing load. Each contact is then looped through; within the loop, an HTTP request is sent to an unofficial WhatsApp API to verify the contact’s number.
Results from the verification process are processed through ‘If’ nodes that determine whether the number is active on WhatsApp. Based on the outcome, the workflow updates the contact’s status in Google Sheets—marking verified or pending—by modifying the respective rows. The use of ‘Wait’ nodes helps manage pacing or rate limits during processing.
This automation is especially useful for businesses or service providers that need to validate large numbers of contact details efficiently, ensuring that outreach or marketing efforts are based on active WhatsApp numbers while saving time and reducing manual effort.
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