Send Stripe invoice reminders with GPT-4.1-mini, Google Sheets and Slack

by Hyrum Hurst ✓ · 297 views · created 2026-01-15 · Invoice Processing, AI Summarization

What this workflow does

This AI workflow has 13 nodes and runs on Stripe events. Along the way it connects Stripe, OpenAI Chat Model, Google Sheets and Slack and 1 more.

How it runs

Trigger: On Stripe events.

1. Workflow Configuration (Edit Fields (Set)): sets or maps fields
2. Normalize Invoice Data (Edit Fields (Set)): sets or maps fields
3. Generate Payment Reminder (AI Agent): runs an AI agent, with model: OpenAI Chat Model; output parser: Structured Output Parser
4. Route by Payment Status (Switch): routes items into branches
5. Log to Google Sheets (Google Sheets): uses Google Sheets
6. Notify Accountant on Slack (Slack): uses Slack
7. Send Reminder Email (Send Email): sends an email over SMTP
8. Generate Invoice PDF (Convert to File): converts data to a file
9. Schedule Follow-up (Google Calendar): uses Google Calendar
10. CRM Integration (HTTP Request): calls an HTTP API

Services it uses

StripeOpenAI Chat ModelGoogle SheetsSlackGoogle Calendar

Before you upgrade to n8n 3.0

Nodes used (12)

• Stripe Triggern8n-nodes-base.stripeTrigger
• Edit Fields (Set)n8n-nodes-base.set
• AI Agent@n8n/n8n-nodes-langchain.agent
• OpenAI Chat Model@n8n/n8n-nodes-langchain.lmChatOpenAi
• Structured Output Parser@n8n/n8n-nodes-langchain.outputParserStructured
• Switchn8n-nodes-base.switch
• Google Sheetsn8n-nodes-base.googleSheets
• Slackn8n-nodes-base.slack
• Send Emailn8n-nodes-base.emailSend
• Convert to Filen8n-nodes-base.convertToFile
• Google Calendarn8n-nodes-base.googleCalendar
• HTTP Requestn8n-nodes-base.httpRequest

From the author

Who this workflow is for Accounting and bookkeeping firms needing automated invoice creation and payment reminders. What this workflow does AI generates personalized emails for overdue invoices, logs invoice info in Google Sheets, notifies accountants via…

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