Analyze contract risk from PDFs with OpenAI, Supabase and Slack alerts

by ben daamer ✓ · 178 views · created 2026-03-04 · Document Extraction, AI Summarization

What this workflow does

This workflow has 23 nodes and runs when someone submits an n8n form (“Contract AI Analysis — Upload & Analyze”) (plus 2 other triggers). Along the way it connects Supabase, Slack and Gmail. It also calls api.openai.com over HTTP.

How it runs

Trigger: When someone submits an n8n form (“Contract AI Analysis — Upload & Analyze”) (plus 2 other triggers).

1. Config (Edit Fields (Set)): sets 7 fields: RISK_THRESHOLD, SLACK_CHANNEL, ADMIN_SLACK_CHANNEL…
2. Slack: create
3. Check Duplicate (HTTP Request): calls an HTTP API
4. Already Exists? (If): checks a condition and branches into true / false
5. Already Analyzed (n8n Form): shows the next form page
6. Has File? (If): checks a condition and branches into true / false
7. Extract PDF Text (Extract from File): extracts data from a file (pdf)
8. Sample Data (Edit Fields (Set)): sets 7 fields: contractText, filename, Contract Type…
9. Prepare Text (Code): runs custom JavaScript code
10. AI Pass 1 - Classify (HTTP Request): calls api.openai.com (POST)

…plus 10 more steps. See the full node list below.

Services it uses

SupabaseSlackGmail

HTTP calls to: api.openai.com

Before you upgrade to n8n 3.0

Nodes used (12)

• n8n Form Triggern8n-nodes-base.formTrigger
• Manual Triggern8n-nodes-base.manualTrigger
• Edit Fields (Set)n8n-nodes-base.set
• HTTP Requestn8n-nodes-base.httpRequest
• Ifn8n-nodes-base.if
• n8n Formn8n-nodes-base.form
• Extract from Filen8n-nodes-base.extractFromFile
• Coden8n-nodes-base.code
• Supabasen8n-nodes-base.supabase
• Error Triggern8n-nodes-base.errorTrigger
• Slackn8n-nodes-base.slack
• Gmailn8n-nodes-base.gmail

From the author

Who it's for Legal, Procurement, and Compliance teams at mid-size companies. ESN and agencies selling AI-powered contract review as a service. How it works Upload a contract PDF through a rich form (with metadata: contract type, counterparty, department,…

View the original on n8n.io → Check your own copy