LLM Paralegal Assistance and Document Automation: Contract, Litigation, and Compliance Processing

This workflow automates legal document analysis and paralegal assistance using OpenAI. It processes uploaded documents, classifies them, and provides specialized analysis for contracts, litigation, compliance, or research. Key nodes include Webhook for document uploads, Condition for security and input validation, Set for sanitization and metadata, Switch for document routing, Agent for AI analysis, and Webhook Response for results. To set up, install n8n by downloading from n8n.io for self-hosting or sign up at cloud.n8n.io. Obtain an OpenAI API key from platform.openai.com and add it under Credentials > Add Credential > OpenAI API. Import the workflow JSON via Workflows > Import. Configure the Webhook node with the path /paralegal-document-upload, setting HTTP Method to POST. Use ngrok for local testing to expose the webhook URL. Ensure the Webhook Response node includes CORS headers (Access-Control-Allow-Origin: *) for browser compatibility. No additional database credentials are required. Test by sending a POST request to the webhook with a JSON payload containing document content (e.g., contract text) and documentType (contract, litigation, compliance, or research). Verify the Condition nodes check for a valid API key and content size (<50MB). The Switch node should route to the appropriate Agent node (e.g., Contract Analyzer), and the Webhook Response should return JSON with analysis, metadata, and action items. Check for errors like missing API keys (401 response) or invalid documentType (400 response with 'INVALID_INPUT'). Deploy by saving and enabling the workflow, ensuring the webhook is active. Validate outputs in the Comprehensive Response Formatter for structured JSON with analysis, case metadata, and disclaimers. For errors, confirm the OpenAI API key in n8n’s Credentials section and ensure document content is non-empty and correctly formatted. Test the Chat Trigger (/paralegal-chat) for follow-up queries, verifying responses include legal citations and action items.