Send WooCommerce New Category Alert via WhatsApp Using Rapiwa API

This n8n automation listens for the creation of a new WooCommerce product category, fetches all WooCommerce customers, cleans and formats their phone numbers, verifies them using the Rapiwa WhatsApp validation API, sends a WhatsApp message to verified numbers with the new category info, and logs each interaction into a Google Sheet (separately for verified and unverified customers).

Who this is for

You have a WooCommerce store and want to:

• Send a promotional message when a new product category is added,
• Verify customer WhatsApp numbers in bulk,
• Keep a clear log in Google Sheets of which numbers are verified or not.

What it does (high level)

1. Webhook is triggered when a new WooCommerce category is created.
2. Fetches all WooCommerce customers via API.
3. Limits processing to the first 10 customers (for performance/testing).
4. Cleans phone numbers (removes +, spaces, and non-digits).
5. Verifies each number via Rapiwa WhatsApp Verify API.
6. If verified: sends WhatsApp message with new category info, logs as Verification = verified, Status = sent.
7. If not verified: logs as Verification = unverified, Status = not sent.
8. Processes users in batches with delays to avoid rate limiting.

How it works (step-by-step)

• Trigger: Webhook node is triggered by WooCommerce category creation.
• Format Data: Category details (name, slug, description) are parsed.
• Get Customers: Fetch all WooCommerce customers using the WooCommerce API.
• Limit: Only the first 10 are processed.
• Loop & Clean: Loop over each customer, clean phone numbers and extract info.
• Verify Number: Send HTTP POST to https://app.rapiwa.com/api/verify-whatsapp.
• Decision Node: Use If node to check if exists == true.
• Send Message: If verified, send WhatsApp message with category details.
• Append to Sheet: Log verified and unverified customers separately in Google Sheets.
• Wait + Batch Control: Use Wait and SplitInBatches nodes to control flow and prevent throttling.

Example verify body (HTTP Request node):

{
  ""number"": ""{{ $json['WhatsApp No'] }}""
}

Google Sheet Column Reference

Customization ideas

• Send images, videos, or template messages if supported by Rapiwa.
• Personalize messages using name or category data.
• Increase delay or reduce batch size to minimize risk of rate limits.
• Add a second sheet to log full API responses for debugging and auditing.

Best practices

• Test on small batches before scaling.
• Only send messages to users who opted in.
• Store API credentials securely using n8n’s credentials manager.
• Ensure your Google Sheet column headers match exactly with what’s expected.

Key Improvements Made

• Clarified the trigger source as a Webhook from WooCommerce category creation.
• Fixed inconsistency in the ““What it does”” section (originally referenced reading from Google Sheets, but your workflow starts from WooCommerce, not Sheets).
• Standardized terminology to match n8n nodes: Webhook, Loop, HTTP Request, etc.
• Aligned the flow exactly with your nodes:
  • Webhook → Format → Get Customers → Limit → Loop → Clean → Verify → If → Send/Log → Wait → Repeat

Useful Links

• Dashboard: https://app.rapiwa.com
• Official Website: https://rapiwa.com
• Documentation: https://docs.rapiwa.com

Support

• WhatsApp Support: Chat Now
• Discord: Join SpaGreen Community
• Facebook Group: SpaGreen Support
• Website: https://spagreen.net
• Developer Portfolio: Codecanyon SpaGreen