Automated lead qualification voice agent with OpenAI GPT, Twilio, Elevenlabs and Gmail

by Jainik Sheth · 2,114 views · created 2025-10-18 · Lead Nurturing, AI Chatbot

What this workflow does

This AI workflow has 16 nodes and runs on Google Sheets events (row added) (plus 2 other triggers). Along the way it connects Google Sheets, OpenAI and Gmail. It also calls api.elevenlabs.io over HTTP.

How it runs

Trigger: On Google Sheets events (row added) (plus 2 other triggers).

1. Outbound Call (HTTP Request): calls api.elevenlabs.io (POST)
2. Edit Fields (Edit Fields (Set)): sets 2 fields: country_code, phone_number
3. Code: runs custom JavaScript code
4. Look up Customer Data (Google Sheets): uses Google Sheets
5. Message a model (OpenAI): uses OpenAI
6. Message a model (OpenAI): uses OpenAI
7. If: checks a condition and branches into true / false
8. Edit Fields (Edit Fields (Set)): sets 2 fields: country_code, phone_number
9. Respond to Webhook: sends the response back to the webhook caller
10. Merge: merges the data from its input branches

…plus 3 more steps. See the full node list below.

Services it uses

Google SheetsOpenAIGmail

HTTP calls to: api.elevenlabs.io

Before you upgrade to n8n 3.0

Nodes used (11)

• Google Sheets Triggern8n-nodes-base.googleSheetsTrigger
• Webhookn8n-nodes-base.webhook
• Respond to Webhookn8n-nodes-base.respondToWebhook
• Coden8n-nodes-base.code
• OpenAI@n8n/n8n-nodes-langchain.openAi
• Ifn8n-nodes-base.if
• Google Sheetsn8n-nodes-base.googleSheets
• Edit Fields (Set)n8n-nodes-base.set
• Mergen8n-nodes-base.merge
• Gmailn8n-nodes-base.gmail
• HTTP Requestn8n-nodes-base.httpRequest

From the author

What is this? This workflow is a Lead Qualification Voice Agent automation template built in n8n. It automates the process of qualifying leads by initiating outbound calls, analyzing call transcripts, updating lead data, and sending follow-up emails. The…

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