Send AI website audits with GPT-4.1 and Gmail as a lead magnet

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1. Workflow Overview

How it works A prospect submits a form with their email and website URL The workflow fetches and cleans the website HTML, extracting key business signals An Analyst Agent reads the content and prod...

Best for

Lead Generation automation workflows
AI Summarization automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.formtrigger, @n8n/n8n-nodes-langchain.lmchatopenai, @n8n/n8n-nodes-langchain.outputparserstructured, @n8n/n8n-nodes-langchain.agent, n8n-nodes-base.gmail, n8n-nodes-base.code, n8n-nodes-base.httprequest, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Stefan Joulien.

Original n8n.io source

1.1 Workflow description

Title: Send AI website audits with GPT-4.1 and Gmail as a lead magnet
Workflow name: Send AI website audits with GPT-4.1 and Gmail as a lead magnet

How it works

A prospect submits a form with their email and website URL
The workflow fetches and cleans the website HTML, extracting key business signals
An Analyst Agent reads the content and produces a structured JSON diagnostic (business type, offers, pain points, funnels, copy kit)
A Writer Agent converts the diagnostic into a personalised email with 10 actionable improvements, written automatically in the lead's language
A branded HTML email is assembled and sent via Gmail with numbered improvement cards, a booking CTA and a professional footer

Set up steps

Connect your OpenAI API credentials to both AI model nodes (~2 min)
Connect your Gmail account to the Send Email node (~1 min)
Open the Build Email HTML node and fill in the 6 constants at the top: your name, email, cal.com booking link, Instagram URL, LinkedIn URL and logo image URL (~3 min)
Activate the workflow and share the form URL with your leads

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Form Trigger

Type / Role: n8n-nodes-base.formTrigger - formTrigger
Config choices: Version 2.2

Block 2 - OpenAI – Analyst Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.2

Block 3 - Analyst Output Parser

Type / Role: @n8n/n8n-nodes-langchain.outputParserStructured - outputParserStructured
Config choices: Version 1.3

Block 4 - Writer Output Parser

Type / Role: @n8n/n8n-nodes-langchain.outputParserStructured - outputParserStructured
Config choices: Version 1.3

Block 5 - Analyst Agent

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 2.2

Block 6 - Writer Agent

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 2.2

Block 7 - OpenAI – Writer Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.2

Block 8 - Send Email

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2.1

Block 9 - Build Email HTML

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 10 - Clean HTML

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

Block 11 - Fetch Website HTML

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 12 - Sticky – Overview

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 13 - Sticky – Form

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 14 - Sticky – Fetch & Clean

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 15 - Sticky – Analyst Agent

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 16 - Sticky – Writer Agent

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 17 - Sticky – Build HTML

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 18 - Sticky – Send Email

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Send AI website audits with GPT-4.1 and Gmail as a lead magnet
Complexity	advanced
Nodes	18
Categories	Lead Generation, AI Summarization
Author	Stefan Joulien
Published	22 Mar 2026

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/14227/14227.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Lead Generation workflows AI Summarization workflows

Frequently asked questions

What does Send AI website audits with GPT-4.1 and Gmail as a lead magnet do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Lead Generation, AI Summarization use case.

Stefan Joulien

5 workflows

Nodes

n8n-nodes-base.formtrigger @n8n/n8n-nodes-langchain.lmchatopenai @n8n/n8n-nodes-langchain.outputparserstructured @n8n/n8n-nodes-langchain.agent n8n-nodes-base.gmail n8n-nodes-base.code n8n-nodes-base.httprequest n8n-nodes-base.stickynote

Complexity

advanced

Published 22 Mar 2026

Likes 0

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Install path: /data/workflows/14227/14227.json

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Send AI website audits with GPT-4.1 and Gmail as a lead magnet

Workflow preview

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

How it works

Set up steps

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Form Trigger

Block 2 - OpenAI – Analyst Model

Block 3 - Analyst Output Parser

Block 4 - Writer Output Parser

Block 5 - Analyst Agent

Block 6 - Writer Agent

Block 7 - OpenAI – Writer Model

Block 8 - Send Email

Block 9 - Build Email HTML

Block 10 - Clean HTML

Block 11 - Fetch Website HTML

Block 12 - Sticky – Overview

Block 13 - Sticky – Form

Block 14 - Sticky – Fetch & Clean

Block 15 - Sticky – Analyst Agent

Block 16 - Sticky – Writer Agent

Block 17 - Sticky – Build HTML

Block 18 - Sticky – Send Email

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions