{"product_id":"extract-invoice-data-from-pdfs-with-claude-google-sheets","title":"Extract Invoice Data from PDFs with Claude + Google Sheets","description":"\u003ch3\u003eExtract Invoice Fields from PDFs in n8n using Claude + Google Sheets\u003c\/h3\u003e\n\u003cp\u003eUpload an invoice PDF, and this n8n workflow extracts key invoice data with the Anthropic Claude API—then automatically logs high-confidence results to Google Sheets while sending uncertain items to a separate review queue.\u003c\/p\u003e\n\n\u003ch3\u003eWhat this workflow does\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReceives invoice PDFs via an n8n Form trigger\u003c\/strong\u003e (file upload from your form).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConverts the PDF to raw text\u003c\/strong\u003e so the invoice content can be analyzed.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSends the extracted text to Claude (Anthropic Messages API)\u003c\/strong\u003e and requests \u003cem\u003estrict JSON\u003c\/em\u003e containing key invoice fields plus an overall \u003cstrong\u003econfidence score\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eParses and validates Claude’s JSON output\u003c\/strong\u003e, checking confidence against a threshold and flagging unknown or missing fields.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRoutes results by confidence:\u003c\/strong\u003e\n    \u003cul\u003e\n      \u003cli\u003eAppends trusted extractions to the \u003cstrong\u003e“Extracted”\u003c\/strong\u003e tab in Google Sheets.\u003c\/li\u003e\n      \u003cli\u003eAppends low-confidence or incomplete extractions to the \u003cstrong\u003e“Review Queue”\u003c\/strong\u003e tab for manual verification.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eInvoice processing for SaaS operators who need structured data from PDF invoices without building custom parsers.\u003c\/li\u003e\n  \u003cli\u003eAutomation engineers creating an extraction pipeline with human-in-the-loop review for edge cases and low-quality PDFs.\u003c\/li\u003e\n  \u003cli\u003eOperations teams centralizing invoice fields in Google Sheets while keeping uncertain records out of the “Extracted” sheet.\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:\u003c\/strong\u003e form trigger, HTTP request, code, if, and sticky note.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAnthropic (Claude) integration:\u003c\/strong\u003e HTTP request with \u003cstrong\u003ex-api-key\u003c\/strong\u003e using Anthropic’s required headers; prompts Claude to return \u003cstrong\u003estrict JSON\u003c\/strong\u003e with a \u003cstrong\u003econfidence score\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGoogle Sheets:\u003c\/strong\u003e two append steps targeting the spreadsheet tabs \u003cstrong\u003e“Extracted”\u003c\/strong\u003e and \u003cstrong\u003e“Review Queue”\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSetup requirements:\u003c\/strong\u003e add your Anthropic API key to HTTP header auth, replace \u003cem\u003eREPLACE_WITH_YOUR_SPREADSHEET_ID\u003c\/em\u003e, create the two tabs, and test with both clear and low-quality invoices.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45785632243891,"sku":"N8N-17919","price":58.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/GUrfPu_Dxl4HmLVB61n9E_wV19lgUq.png?v=1786180004","url":"https:\/\/buyflowscripts.com\/products\/extract-invoice-data-from-pdfs-with-claude-google-sheets","provider":"N8N Commerce","version":"1.0","type":"link"}