N8N SMS Filter Unknown Contacts Workflow
A ready-to-use n8n workflow template that filters incoming calls to identify unknown/unsaved contacts and sends SMS notifications only to numbers not in Google Contacts, eliminating manual exclusion lists.
9-node workflow
Get it now →You're tired of manually managing exclusion lists just to stop spamming your own saved contacts with automated SMS.
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Who this is for:
- Freelancers and consultants screening inbound calls without a receptionist
- Small business owners running SMS campaigns who need smarter filtering
- n8n builders who want a real-world workflow they can ship immediately
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What's inside:
- A 9-node n8n workflow that cross-references incoming numbers against Google Contacts in real time
- Importable JSON — drop it into your instance and it works
- A setup guide that walks you through credentials, node config, and testing so you're not guessing
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No more maintaining a manual blocklist. No more accidental texts to people already in your phone. The logic is built in — Google Contacts is your source of truth, and the workflow handles the rest automatically.
Download and use it today.