GPT-4o: Twilio integration with auto follow-up features

by Greypillar ✓ · 265 views · created 2025-10-01 · Lead Nurturing

What this workflow does

This AI workflow has 20 nodes and runs on Twilio events (com.twilio.voice.insights.call summary.complete). Along the way it connects Twilio, OpenAI Chat Model, Airtable and Slack.

How it runs

Trigger: On Twilio events (com.twilio.voice.insights.call summary.complete).

1. Analyze Call Context (Code): runs custom JavaScript code
2. Check Existing Contact (HTTP Request): calls an HTTP API
3. Merge Customer Data (Code): runs custom JavaScript code
4. Generate AI Response (Basic LLM Chain): sends a prompt to an LLM, with model: OpenAI Chat Model; output parser: Structured Output Parser
5. Prepare Messages (Code): runs custom JavaScript code
6. Send SMS? (If): checks a condition and branches into true / false
7. Send Email? (If): checks a condition and branches into true / false
8. Send SMS (Twilio): uses Twilio
9. Send Email: sends an email over SMTP
10. Merge: merges the data from its input branches

…plus 7 more steps. See the full node list below.

Services it uses

TwilioOpenAI Chat ModelAirtableSlack

Before you upgrade to n8n 3.0

Nodes used (13)

• Mergen8n-nodes-base.merge
• Coden8n-nodes-base.code
• Twilio Triggern8n-nodes-base.twilioTrigger
• HTTP Requestn8n-nodes-base.httpRequest
• Basic LLM Chain@n8n/n8n-nodes-langchain.chainLlm
• OpenAI Chat Model@n8n/n8n-nodes-langchain.lmChatOpenAi
• Structured Output Parser@n8n/n8n-nodes-langchain.outputParserStructured
• Ifn8n-nodes-base.if
• Twilion8n-nodes-base.twilio
• Send Emailn8n-nodes-base.emailSend
• Airtablen8n-nodes-base.airtable
• Slackn8n-nodes-base.slack
• Waitn8n-nodes-base.wait

From the author

How it works • Twilio webhook detects missed/unanswered calls automatically • Analyzes call context (time of day, business hours, weekend/weekday) • Checks CRM for existing customer data and purchase history (optional) • AI Chain (GPT-4o) generates…

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