{"product_id":"invoice-pdf-generator-n8n-forms-apitemplate-io-drive-gmail-slack","title":"Invoice PDF Generator n8n: Forms → APITemplate.io, Drive, Gmail, Slack","description":"\u003ch3\u003eTurn n8n Form submissions into client-ready invoice PDFs—automatically\u003c\/h3\u003e\n\u003cp\u003eThis \u003cstrong\u003eInvoice PDF Generator\u003c\/strong\u003e n8n workflow takes an \u003cstrong\u003en8n Form\u003c\/strong\u003e invoice request, generates a polished \u003cstrong\u003einvoice PDF\u003c\/strong\u003e using \u003cstrong\u003eAPITemplate.io\u003c\/strong\u003e, uploads it to \u003cstrong\u003eGoogle Drive\u003c\/strong\u003e, emails the customer via \u003cstrong\u003eGmail\u003c\/strong\u003e, and posts an invoice summary with links to \u003cstrong\u003eSlack\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 invoice data\u003c\/strong\u003e from an \u003cstrong\u003en8n Form\u003c\/strong\u003e submission.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBuilds a single form_data object\u003c\/strong\u003e and verifies required fields are present (including \u003cstrong\u003ecustomer name\u003c\/strong\u003e, \u003cstrong\u003eemail\u003c\/strong\u003e, and \u003cstrong\u003einvoice number\u003c\/strong\u003e).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCreates an invoice payload\u003c\/strong\u003e by generating a document ID and adding a predefined list of invoice line items.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGenerates the PDF\u003c\/strong\u003e from an \u003cstrong\u003eAPITemplate.io\u003c\/strong\u003e PDF template by mapping form fields and items into the template properties.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfirms successful PDF generation\u003c\/strong\u003e and captures the resulting binary data for upload and email.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUploads to Google Drive\u003c\/strong\u003e into a specified destination folder.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEmails the invoice via Gmail\u003c\/strong\u003e with Drive and direct download links for the customer.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNotifies a Slack channel\u003c\/strong\u003e with the invoice details and links for internal visibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSaaS operators generating invoices when customers submit requests through an \u003cstrong\u003en8n Form\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eAutomation engineers standardizing invoice delivery with \u003cstrong\u003eAPITemplate.io\u003c\/strong\u003e, \u003cstrong\u003eGoogle Drive\u003c\/strong\u003e, and \u003cstrong\u003eGmail\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eTeams that need an audit trail and quick internal updates via \u003cstrong\u003eSlack\u003c\/strong\u003e every time an invoice is created.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAPITemplate.io\u003c\/strong\u003e: PDF template ID and placeholder mapping (e.g., fullName, invoice_no, items).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGoogle Drive\u003c\/strong\u003e: OAuth credentials + upload destination folder.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGmail\u003c\/strong\u003e: OAuth credentials to send the invoice email to the form submitter.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSlack\u003c\/strong\u003e: OAuth credentials + target channel for invoice notifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003en8n nodes used\u003c\/strong\u003e: \u003cem\u003eif\u003c\/em\u003e, \u003cem\u003eset\u003c\/em\u003e, \u003cem\u003egmail\u003c\/em\u003e, \u003cem\u003eslack\u003c\/em\u003e, \u003cem\u003esticky note\u003c\/em\u003e, \u003cem\u003eform trigger\u003c\/em\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"N8N Commerce","offers":[{"title":"Default Title","offer_id":45950245241011,"sku":"N8N-19127","price":8.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0749\/6279\/6723\/files\/4pITl19BGdFGzJbPJnExa_HMKZz8PQ.png?v=1788514165","url":"https:\/\/buyflowscripts.com\/products\/invoice-pdf-generator-n8n-forms-apitemplate-io-drive-gmail-slack","provider":"N8N Commerce","version":"1.0","type":"link"}