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Audit & generate JSON-LD schema markup for SEO with GPT-4.1-mini + Gmail

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Audit & generate JSON-LD schema markup for SEO with GPT-4.1-mini + Gmail preview
Open on n8n.io

Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Schema Markup Generator Automatically audit and optimize your site’s JSON LD structured data and email a step by step implementation guide. What It Does Collects a website URL & email via form Extr...

Best for

  • Market Research automation workflows
  • Multimodal AI automation workflows
  • intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.gmail, @n8n/n8n-nodes-langchain.agent, @n8n/n8n-nodes-langchain.lmchatopenrouter, @n8n/n8n-nodes-langchain.toolcode, n8n-nodes-base.formtrigger, n8n-nodes-base.httprequesttool, @n8n/n8n-nodes-langchain.outputparserautofixing

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title
Audit & generate JSON-LD schema markup for SEO with GPT-4.1-mini + Gmail
Workflow name
Audit & generate JSON-LD schema markup for SEO with GPT-4.1-mini + Gmail

Schema Markup Generator Automatically audit and optimize your site’s JSON-LD structured data and email a step-by-step implementation guide.


What It Does

  • Collects a website URL & email via form
  • Extracts existing JSON-LD, identifies gaps
  • Generates optimized schema markup (GPT-4.1-mini)
  • Builds an HTML before/after guide with action items
  • Emails the full implementation instructions

Prerequisites

  • n8n instance (self-hosted, Desktop, or Cloud)
  • Gmail OAuth2 credentials
  • OpenRouter API key (for GPT-4.1-mini)

Quick Setup

  1. Gmail: Add OAuth2 credential → select in “Send Email” node
  2. OpenRouter: Store API key → link in “Schema Markup Agent” node
  3. Form: Configure fields websiteUrl & emailAddress in your Webhook/Form node

Customization

  • AI Prompt: Tweak system message to focus on specific schema types or output style
  • Email Template: Modify HTML header/footer or add sections

Troubleshooting & Limits

  • Monitor OpenRouter rate limits and Gmail send quotas
  • Ensure target sites allow scraping for schema extraction

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 - Sticky Note

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

Block 2 - Sticky Note3

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

Block 3 - Sticky Note1

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

Block 4 - Send to your email

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

Block 5 - Sticky Note2

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

Block 6 - Schema Markup Agent

Type / Role
@n8n/n8n-nodes-langchain.agent - agent
Config choices
Version 1.9

Block 7 - OpenRouter

Type / Role
@n8n/n8n-nodes-langchain.lmChatOpenRouter - lmChatOpenRouter
Config choices
Version 1

Block 8 - Code

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

Block 9 - On form submission

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

Block 10 - HTTP Request

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

Block 11 - Auto-fixing Output Parser

Type / Role
@n8n/n8n-nodes-langchain.outputParserAutofixing - outputParserAutofixing
Config choices
Version 1

Block 12 - Structured Output

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

Block 13 - OpenRouter1

Type / Role
@n8n/n8n-nodes-langchain.lmChatOpenRouter - lmChatOpenRouter
Config choices
Version 1

3. Summary Table

Workflow Audit & generate JSON-LD schema markup for SEO with GPT-4.1-mini + Gmail
Complexity intermediate
Nodes 13
Categories Market Research, Multimodal AI
Author Ari Nakos
Published 11 May 2025

4. Reproducing the Workflow from Scratch

  1. 1. Download the workflow JSON

    Use the JSON export at /data/workflows/3980/3980.json as the source template for this automation.

  2. 2. Import the template into n8n

    Open n8n, import the downloaded JSON, and review each node before activating the workflow.

  3. 3. Configure credentials and variables

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

  4. 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. 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.

Frequently asked questions

What does Audit & generate JSON-LD schema markup for SEO with GPT-4.1-mini + Gmail do?

Schema Markup Generator Automatically audit and optimize your site’s JSON LD structured data and email a step by step implementation guide. What It Does Collects a website URL & email via form Extr...

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 Market Research, Multimodal AI use case.