Audit & Generate JSON-LD Schema Markup for SEO with GPT-4.1-mini + Gmail

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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.