{"product_id":"n8n-legal-proposal-automation-google-sheets-gpt-4o-gmail","title":"n8n Legal Proposal Automation: Google Sheets, GPT-4o \u0026 Gmail","description":"\u003ch3\u003eTurn project requests into ready-to-send legal proposals—automatically\u003c\/h3\u003e\n\u003cp\u003eThis n8n Legal Proposal Automation workflow takes a project intake via a POST webhook, looks up service pricing in \u003cstrong\u003eGoogle Sheets\u003c\/strong\u003e, uses \u003cstrong\u003eGPT-4o\u003c\/strong\u003e to analyze scope and generate a branded proposal, renders it to \u003cstrong\u003ePDF\u003c\/strong\u003e and \u003cstrong\u003eDOCX\u003c\/strong\u003e, and emails both attachments through \u003cstrong\u003eGmail\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceives requests via Webhook:\u003c\/strong\u003e Accepts project requirements through a POST webhook and immediately returns a JSON acknowledgment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePulls pricing from Google Sheets:\u003c\/strong\u003e Reads a service catalog and pricing table from Google Sheets and merges it with the submitted intake data.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnalyzes scope with OpenAI:\u003c\/strong\u003e Uses \u003cstrong\u003egpt-4o-mini\u003c\/strong\u003e to propose phases, identify required services, and flag any missing services from the pricing catalog.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFills gaps with SerpApi (optional):\u003c\/strong\u003e When pricing is missing, queries \u003cstrong\u003eSerpApi\u003c\/strong\u003e (Google search) and parses snippets to estimate market price ranges.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilds the full proposal output:\u003c\/strong\u003e Creates a cost breakdown, budget comparison, and timeline based on available pricing and the generated analysis.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenerates branded HTML + documents:\u003c\/strong\u003e Uses \u003cstrong\u003egpt-4o\u003c\/strong\u003e to generate proposal \u003cstrong\u003eHTML\u003c\/strong\u003e, applies branding, then renders to \u003cstrong\u003ePDF\u003c\/strong\u003e via \u003cstrong\u003eGotenberg\u003c\/strong\u003e and converts to \u003cstrong\u003eDOCX\u003c\/strong\u003e via a Pandoc-based HTTP endpoint.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSends via Gmail:\u003c\/strong\u003e Emails the HTML-derived PDF and DOCX as attachments using the \u003cstrong\u003eGmail\u003c\/strong\u003e integration.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSaaS operators or law-adjacent teams generating consistent proposals from form submissions.\u003c\/li\u003e\n  \u003cli\u003eAutomation engineers deploying an end-to-end proposal pipeline using n8n + Google Sheets pricing.\u003c\/li\u003e\n  \u003cli\u003eTeams that need fast turnarounds when requested services don’t exist in the pricing catalog.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003en8n nodes\/tools:\u003c\/strong\u003e webhook, if, code, merge, sticky note, gmail.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIntegrations:\u003c\/strong\u003e Google Sheets (service pricing), OpenAI (gpt-4o-mini and gpt-4o), SerpApi (optional pricing estimation).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDocument rendering:\u003c\/strong\u003e Gotenberg for PDF; Pandoc-based HTTP service for DOCX conversion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSEO keywords:\u003c\/strong\u003e n8n legal proposal automation, Google Sheets pricing, GPT-4o proposal generator, Gmail proposal email, PDF and DOCX rendering workflow.\u003c\/p\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45822092378291,"sku":"N8N-18078","price":18.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/6gjvaukT38T1FkgpQotz4_PZVfST1P.png?v=1786525784","url":"https:\/\/buyflowscripts.com\/products\/n8n-legal-proposal-automation-google-sheets-gpt-4o-gmail","provider":"N8N Commerce","version":"1.0","type":"link"}