Audit & Generate JSON-LD Schema Markup for SEO with GPT-4.1-mini + Gmail
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Ari Nakos
Description
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
Gmail: Add OAuth2 credential → select in “Send Email” node
OpenRouter: Store API key → link in “Schema Markup Agent” node
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
This workflow was created by Ari Nakos and shared publicly on the n8n community template library. n8nFind indexes it for discovery — the workflow remains the property of its original creator.