Optimize Cold Email Copy with Claude, Instantly, and Google Sheets

by Devon Toh ✓ · 146 views · created 2026-03-21 · Lead Nurturing, AI Summarization

What this workflow does

This workflow has 15 nodes and runs on a schedule (every 6 hours). It uses only n8n's built-in nodes. It also calls api.anthropic.com over HTTP.

How it runs

Trigger: On a schedule (every 6 hours).

1. Pull Instantly Campaign Stats (HTTP Request): calls an HTTP API
2. Read Experiment History (HTTP Request): calls an HTTP API
3. Read Active Variants (HTTP Request): calls an HTTP API
4. Read Program Doc (HTTP Request): calls an HTTP API
5. Merge Stats and History (Code): runs custom JavaScript code
6. Check Data Threshold (Code): runs custom JavaScript code
7. Route by Action (Code): runs custom JavaScript code
8. Safety Floor Check (Code): runs custom JavaScript code
9. Claude Evaluate and Generate (HTTP Request): calls api.anthropic.com (POST)
10. Telegram Safety Alert (HTTP Request): calls an HTTP API (POST)

…plus 4 more steps. See the full node list below.

HTTP calls to: api.anthropic.com

Before you upgrade to n8n 3.0

Nodes used (3)

• Schedule Triggern8n-nodes-base.scheduleTrigger
• HTTP Requestn8n-nodes-base.httpRequest
• Coden8n-nodes-base.code

From the author

Optimize Cold Email Copy with Claude, Instantly, and Google Sheets Inspired by Karpathy's Autoresearch, this workflow treats your cold email campaigns as continuous experiments. Instead of writing copy once and hoping for the best, it runs an automated…

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