Approve invoices with Claude vision, Google Drive, and Google Sheets

by SEVENEDGE ✓ · 17 views · created 2026-08-15 · Invoice Processing, AI Summarization

What this workflow does

This workflow has 28 nodes and runs on Google Drive events (file created) (plus 1 other trigger). Along the way it connects Google Drive and Google Sheets. It also calls api.anthropic.com over HTTP.

How it runs

Trigger: On Google Drive events (file created) (plus 1 other trigger).

1. Download Invoice from Drive (Google Drive): download
2. Set Configuration Parameters (Edit Fields (Set)): sets 7 fields: approvalThreshold, anthropicModel, notifyWebhookUrl…
3. Extract Base64 from Binary (Code): runs custom JavaScript code
4. Normalize Invoice Data (Code): runs custom JavaScript code
5. Prepare Vision API Request (Code): runs custom JavaScript code
6. Post to Anthropic Vision API (HTTP Request): calls api.anthropic.com (POST)
7. Parse Vision API Response (Code): runs custom JavaScript code
8. Perform Arithmetic Check (Code): runs custom JavaScript code
9. Read Sheets for Duplicates (Google Sheets): uses Google Sheets
10. Check for Invoice Duplicates (Code): runs custom JavaScript code

…plus 16 more steps. See the full node list below.

Services it uses

Google DriveGoogle Sheets

HTTP calls to: api.anthropic.com

Before you upgrade to n8n 3.0

Nodes used (9)

• Google Drive Triggern8n-nodes-base.googleDriveTrigger
• Manual Triggern8n-nodes-base.manualTrigger
• Edit Fields (Set)n8n-nodes-base.set
• Google Driven8n-nodes-base.googleDrive
• Coden8n-nodes-base.code
• HTTP Requestn8n-nodes-base.httpRequest
• Google Sheetsn8n-nodes-base.googleSheets
• Ifn8n-nodes-base.if
• Waitn8n-nodes-base.wait

From the author

Quick overview This workflow watches a Google Drive folder for new invoices, extracts invoice fields with Anthropic Claude vision, validates totals and checks for duplicates in Google Sheets, then auto-approves low-risk invoices or pauses for human approval…

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