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